Devresse, Q. , Becker, K. W. and Engel, A. (2024) Distribution of polysaccharidic and proteinaceous gel−like particles in three cyclonic eddies in the Eastern Tropical North Atlantic. Frontiers in Marine Science, 11 . Art.Nr. 1357646. DOI 10.3389/fmars.2024.1357646.

Zhou, L., Liu, F., Achterberg, E. P. , Engel, A. , Campbell, P. G. C., Fortin, C., Huang, L. and Tan, Y. (2024) Promoting effects of aluminum addition on chlorophyll biosynthesis and growth of two cultured iron‐limited marine diatoms. Limnology and Oceanography . DOI 10.1002/lno.12558.

Massmig, M., Cisternas-Novoa, C. and Engel, A. (2024) Uncovering the role of oxygen on organic carbon cycling: Insights from a continuous culture study with a facultative anaerobic bacterioplankton species (Shewanella baltica). Frontiers in Marine Science, 11 . Art.Nr. 1328392. DOI 10.3389/fmars.2024.1328392.

Yuan, Z., Achterberg, E. P. , Engel, A. , Dai, M. and Browning, T. J. (2024) Switches between nitrogen limitation and nitrogen–phosphorus co‐limitation in the subtropical North Atlantic Ocean. Limnology and Oceanography . DOI 10.1002/lno.12541.

Wietz, M., Engel, A. , Ramondenc, S., Niwano, M., von Appen, W., Priest, T., von Jackowski, A. , Metfies, K., Bienhold, C. and Boetius, A. (2024) The Arctic summer microbiome across Fram Strait: Depth, longitude, and substrate concentrations structure microbial diversity in the euphotic zone. Environmental Microbiology, 26 (2). Art.Nr. e16568. DOI 10.1111/1462-2920.16568.

Engel, A. , Cisternas-Novoa, C., Hauss, H. , Kiko, R. and Le Moigne, F. A. C. (2023) Hypoxia-tolerant zooplankton may reduce biological carbon pump efficiency in the Humboldt current system off Peru. Communications Earth & Environment, 4 (1). Art.Nr. 458. DOI 10.1038/s43247-023-01140-6.

Chamba, G., Rissanen, M., Barthelmess, T., Saiz-Lopez, A., Rose, C., Iyer, S., Saint-Macary, A., Rocco, M., Safi, K., Deppeler, S., Barr, N., Harvey, M., Engel, A. , Dunne, E., Law, C. S. and Sellegri, K. (2023) Evidence of nitrate-based nighttime atmospheric nucleation driven by marine microorganisms in the South Pacific. PNAS Proceedings of the National Academy of Sciences of the United States of America, 120 (48). Art.Nr. e2308696120. DOI 10.1073/pnas.2308696120.

Sellegri, K., Barthelmess, T., Trueblood, J., Cristi, A., Freney, E., Rose, C., Barr, N., Harvey, M., Safi, K., Deppeler, S., Thompson, K., Dillon, W., Engel, A. and Law, C. (2023) Quantified effect of seawater biogeochemistry on the temperature dependence of sea spray aerosol fluxes. Atmospheric Chemistry and Physics, 23 (20). pp. 12949-12964. DOI 10.5194/acp-2022-790.

Krause, J., Zhu, X., Höfer, J., Achterberg, E. P. , Engel, A. , Meire, L., Stuart‐Lee, A. E. and Hopwood, M. J. (2023) Glacier‐Derived Particles as a Regional Control on Marine Dissolved Pb Concentrations. Journal of Geophysical Research: Biogeosciences, 128 (10). Art.Nr. e2023JG007514. DOI 10.1029/2023JG007514.

Tinel, L., Abbatt, J., Saltzman, E., Engel, A. , Fernandez, R., Li, Q., Mahajan, A. S., Nicewonger, M., Novak, G., Saiz-Lopez, A., Schneider, S. and Wang, S. (2023) Impacts of ocean biogeochemistry on atmospheric chemistry. Elementa: Science of the Anthropocene, 11 (1). Art.Nr. 00032.. DOI 10.1525/elementa.2023.00032.

Yuan, Z., Achterberg, E. P. , Engel, A. , Wen, Z., Zhou, L., Zhu, X., Dai, M. and Browning, T. J. (2023) Phytoplankton community response to episodic wet and dry aerosol deposition in the subtropical North Atlantic. Limnology and Oceanography, 68 (9). pp. 2126-2140. DOI 10.1002/lno.12410.

Browning, T. J. , Saito, M. A., Garaba, S. P., Wang, X., Achterberg, E. P. , Moore, C. M., Engel, A. , Mcllvin, M. R., Moran, D., Voss, D., Zielinski, O. and Tagliabue, A. (2023) Persistent equatorial Pacific iron limitation under ENSO forcing. Nature . DOI 10.1038/s41586-023-06439-0.

Devresse, Q. , Becker, K. W. , Dilmahamod, A. F., Ortega‐Retuerta, E. and Engel, A. (2023) Dissolved Organic Matter Fluorescence as a Tracer of Upwelling and Microbial Activities in Two Cyclonic Eddies in the Eastern Tropical North Atlantic. Journal of Geophysical Research: Oceans, 128 (8). Art.Nr. e2023JC019821. DOI 10.1029/2023JC019821.

Sun, C. C., Zhao, W. J., Yue, W. Z., Cheng, H., Sun, F. L., Wang, Y. T., Wu, M. L., Engel, A. and Wang, Y. S. (2023) Polymeric carbohydrates utilization separates microbiomes into niches: insights into the diversity of microbial carbohydrate-active enzymes in the inner shelf of the Pearl River Estuary, China. Frontiers in Microbiology, 14 . Art.Nr. 1180321. DOI 10.3389/fmicb.2023.1180321.

Stuart-Lee, A. E., Mortensen, J., Juul-Pedersen, T., Middelburg, J. J., Soetaert, K., Hopwood, M. J. , Engel, A. and Meire, L. (2023) Influence of glacier type on bloom phenology in two Southwest Greenland fjords. Estuarine, Coastal and Shelf Science, 284 . Art.Nr. 108271. DOI 10.1016/j.ecss.2023.108271.

Sellegri, K., Harvey, M., Peltola, M., Saint-Macary, A., Barthelmess, T., Rocco, M., Moore, K. A., Cristi, A., Peyrin, F., Barr, N., Labonnote, L., Marriner, A., McGregor, J., Safi, K., Deppeler, S., Archer, S., Dunne, E., Harnwell, J., Delanoe, J., Freney, E., Rose, C., Bazantay, C., Planche, C., Saiz-Lopez, A., Quintanilla-López, J. E., Lebrón-Aguilar, R., Rinaldi, M., Banson, S., Joseph, R., Lupascu, A., Jourdan, O., Mioche, G., Colomb, A., Olivares, G., Querel, R., McDonald, A., Plank, G., Bukosa, B., Dillon, W., Pelon, J., Baray, J. L., Tridon, F., Donnadieu, F., Szczap, F., Engel, A. , DeMott, P. J. and Law, C. S. (2023) Sea2Cloud: From Biogenic Emission Fluxes to Cloud Properties in the Southwest Pacific. Bulletin of the American Meteorological Society, 104 (5). E1017-E1043. DOI 10.1175/BAMS-D-21-0063.1.

Galgani, L., Hepach, H. , Becker, K. W. and Engel, A. (2023) Sediment Traps: A Renowned Tool in Oceanography Applied to New Marine Pollutants. Oceanography, 36 (Suppl. 1). pp. 52-54. DOI 10.5670/oceanog.2023.s1.16.

Perner, M. , Wallmann, K. , Adam-Beyer, N., Hepach, H. , Laufer-Meiser, K., Böhnke, S., Diercks, I., Bange, H. W. , Indenbirken, D., Nikeleit, V., Bryce, C., Kappler, A., Engel, A. and Scholz, F. (2022) Environmental changes affect the microbial release of hydrogen sulfide and methane from sediments at Boknis Eck (SW Baltic Sea). Frontiers in Microbiology, 13 . Art.Nr. 1096062. DOI 10.3389/fmicb.2022.1096062.

Yang, L., Zhang, J., Engel, A. and Yang, G. P. (2022) Spatio-temporal distribution, photoreactivity and environmental control of dissolved organic matter in the sea-surface microlayer of the eastern marginal seas of China. Biogeosciences, 19 (22). pp. 5251-5268. DOI 10.5194/bg-19-5251-2022.

Devresse, Q., Becker, K. W. , Bendinger, A., Hahn, J. and Engel, A. (2022) Eddy-enhanced primary production sustains heterotrophic microbial activities in the Eastern Tropical North Atlantic. Biogeosciences (BG), 19 . pp. 5199-5219. DOI 10.5194/bg-19-5199-2022.

Galgani, L., Goßmann, I., Scholz-Böttcher, B., Jiang, X., Liu, Z., Scheidemann, L., Schlundt, C. and Engel, A. (2022) Hitchhiking into the Deep: How Microplastic Particles are Exported through the Biological Carbon Pump in the North Atlantic Ocean. Environmental Science & Technology, 56 . pp. 15638-15649. DOI 10.1021/acs.est.2c04712.

Barthelmess, T. and Engel, A. (2022) How biogenic polymers control surfactant dynamics in the surface microlayer: Insights from a coastal Baltic Sea study. Biogeosciences (BG), 19 . pp. 4965-4992. DOI 10.5194/bg-19-4965-2022.

Scheidemann, L., Pontiller, B., Manna, V., Cisternas-Novoa, C., Celussi, M., Tsiola, A., Pitta, P., Magiopoulos, I. and Engel, A. (2022) Dynamics and enzymatic degradation of exopolymer particles under increasing concentrations of silver ions and nanoparticles during a marine mesocosm experiment. Frontiers in Marine Science, 9 . Art.Nr. 955488. DOI 10.3389/fmars.2022.955488.

Milinkovic, A., Penezic, A., Kusan, A. C., Gluscic, V., Zuzul, S., Skejic, S., Santic, D., Godec, R., Pehnec, G., Omanovic, D., Engel, A. and Frka, S. (2022) Variabilities of biochemical properties of the sea surface microlayer: Insights to the atmospheric deposition impacts. Science of the Total Environment, 838 . Art.Nr. 156440. DOI 10.1016/j.scitotenv.2022.156440.

Piontek, J., Meeske, C., Hassenrück, C., Engel, A. and Jürgens, K. (2022) Organic matter availability drives the spatial variation in the community composition and activity of Antarctic marine bacterioplankton. Environmental Microbiology, 24 (9). pp. 4030-4048. DOI 10.1111/1462-2920.16087.

von Jackowski, A., Becker, K. W., Wietz, M., Bienhold, C., Zäncker, B., Nöthig, E. and Engel, A. (2022) Variations of microbial communities and substrate regimes in the eastern Fram Strait between summer and fall. Environmental Microbiology, 24 (9). pp. 4124-4136. DOI 10.1111/1462-2920.16036.

van Pinxteren, M., Robinson, T. B., Zeppenfeld, S., Gong, X., Bahlmann, E., Fomba, K. W., Triesch, N., Stratmann, F., Wurl, O., Engel, A. , Wex, H. and Herrmann, H. (2022) High number concentrations of transparent exopolymer particles in ambient aerosol particles and cloud water - a case study at the tropical Atlantic Ocean. Atmospheric Chemistry and Physics, 22 (8). pp. 5725-5742. DOI 10.5194/acp-22-5725-2022.

Santana-Casiano, J. M., González-Santana, D., Devresse, Q., Hepach, H. , Santana-González, C., Quack, B., Engel, A. and González-Dávila, M. (2022) Exploring the Effects of Organic Matter Characteristics on Fe(II) Oxidation Kinetics in Coastal Seawater. Environmental Science & Technology, 56 (4). pp. 2718-2728. DOI 10.1021/acs.est.1c04512.

Engel, A. , Kiko, R. and Dengler, M. (2022) Organic Matter Supply and Utilization in Oxygen Minimum Zones. Annual Review of Marine Science, 14 (1). pp. 355-378. DOI 10.1146/annurev-marine-041921-090849.

Zamanillo, M., Ortega-Retuerta, E., Cisternas-Novoa, C., Marrasé, C., Pelejero, C., Pascual, J., Gasol, J. M., Engel, A. and Simó, R. (2021) Uncoupled seasonal variability of transparent exopolymer and Coomassie stainable particles in coastal Mediterranean waters. Elementa: Science of the Anthropocene, 9 (1). Art.Nr. 00165. DOI 10.1525/elementa.2020.00165.

Barthelmess, T., Schütte, F. and Engel, A. (2021) Variability of the Sea Surface Microlayer Across a Filament’s Edge and Potential Influences on Gas Exchange. Frontiers in Marine Science, 8 . Art.Nr. 718384. DOI 10.3389/fmars.2021.718384.

Van Wambeke, F., Taillandier, V., Desboeufs, K., Pulido-Villena, E. , Dinasquet, J. , Engel, A. , Marañón, E. , Ridame, C. and Guieu, C. (2021) Influence of atmospheric deposition on biogeochemical cycles in an oligotrophic ocean system. Biogeosciences (BG), 18 (20). pp. 5699-5717. DOI 10.5194/bg-18-5699-2021.

Martin, M. A. , Sendra, O. A., Bastos, A., Bauer, N., Bertram, C., Blenckner, T., Bowen, K., Brando, P. M., Rudolph, T. B., Büchs, M., Bustamante, M., Chen, D. , Cleugh, H., Dasgupta, P., Denton, F., Donges, J. F., Donkor, F. K., Duan, H., Duarte, C. M., Ebi, K. L., Edwards, C. M. , Engel, A. , Fisher, E., Fuss, S. , Gaertner, J., Gettelman, A., Girardin, C. A. J., Golledge, N. R., Green, J. F., Grose, M. R., Hashizume, M., Hebden, S., Hepach, H., Hirota, M., Hsu, H. H., Kojima, S., Lele, S., Lorek, S., Lotze, H. K., Matthews, H. D., McCauley, D., Mebratu, D., Mengis, N. , Nolan, R. H. , Pihl, E. , Rahmstorf, S., Redman, A. , Reid, C. E., Rockström, J., Rogelj, J., Saunois, M., Sayer, L., Schlosser, P., Sioen, G. B., Spangenberg, J. H., Stammer, D., Sterner, T. N. S., Stevens, N., Thonicke, K., Tian, H., Winkelmann, R. and Woodcock, J. (2021) Ten new insights in climate science 2021 – a horizon scan. Global Sustainability, 4 (e25). DOI 10.1017/sus.2021.25.

Gazeau, F., Van Wambeke, F., Marañón, E. , Pérez-Lorenzo, M., Alliouane, S., Stolpe, C., Blasco, T., Leblond, N., Zäncker, B., Engel, A. , Marie, B. , Dinasquet, J. and Guieu, C. (2021) Impact of dust addition on the metabolism of Mediterranean plankton communities and carbon export under present and future conditions of pH and temperature. Biogeosciences (BG), 18 (19). pp. 5423-5446. DOI 10.5194/bg-18-5423-2021.

Pitcher, G. C., Aguirre-Velarde, A., Breitburg, D., Cardich, J., Carstensen, J., Conley, D. J., Dewitte, B., Engel, A. , Espinoza-Morriberón, D., Flores, G., Garçon, V., Graco, M., Grégoire, M., Gutiérrez, D., Martin Hernandez-Ayon, J., May Huang, H. H., Isensee, K., Elena Jacinto, M., Levin, L., Lorenzo, A., Machu, E., Merma, L., Montes, I., SWA, N., Paulmier, A., Roman, M., Rose, K., Hood, R., Rabalais, N. N., Gro V. Salvanves, A., Salvatteci, R., Sánchez, S., Sifeddine, A., Wahab Tall, A., van der Plas, A. K., Yasuhara, M., Zhang, J. and Zhu, Z. (2021) System controls of coastal and open ocean oxygen depletion. Progress in Oceanography, 197 . Art.Nr. 102613. DOI 10.1016/j.pocean.2021.102613.

Krahmann, G. , Arevalo-Martinez, D. L. , Dale, A. W. , Dengler, M. , Engel, A. , Glock, N., Grasse, P. , Hahn, J. , Hauss, H. , Hopwood, M. J. , Kiko, R. , Loginova, A. N. , Löscher, C. R. , Maßmig, M., Roy, A. S., Salvatteci, R., Sommer, S., Tanhua, T. and Mehrtens, H. (2021) Climate-Biogeochemistry Interactions in the Tropical Ocean: Data collection and legacy. Frontiers in Marine Science, 8 . Art.Nr. 723304. DOI 10.3389/fmars.2021.723304.

Freney, E., Sellegri, K., Nicosia, A., Williams, L. R., Rinaldi, M., Trueblood, J. T., Prévôt, A. S. H., Thyssen, M., Grégori, G., Haëntjens, N., Dinasquet, J., Obernosterer, I., Van Wambeke, F., Engel, A. , Zäncker, B., Desboeufs, K., Asmi, E., Timonen, H. and Guieu, C. (2021) Mediterranean nascent sea spray organic aerosol and relationships with seawater biogeochemistry. Atmospheric Chemistry and Physics, 21 (13). pp. 10625-10641. DOI 10.5194/acp-21-10625-2021.

Grosse, J. , Nöthig, E. M., Torres-Valdés, S. and Engel, A. (2021) Summertime Amino Acid and Carbohydrate Patterns in Particulate and Dissolved Organic Carbon Across Fram Strait. Frontiers in Marine Science, 8 . Art.Nr. 684675. DOI 10.3389/fmars.2021.684675.

Fadeev, E. , Wietz, M. , von Appen, W., Iversen, M. H., Nöthig, E., Engel, A. , Grosse, J. , Graeve, M. and Boetius, A. (2021) Submesoscale physicochemical dynamics directly shape bacterioplankton community structure in space and time. Limnology and Oceanography, 66 (7). pp. 2901-2913. DOI 10.1002/lno.11799.

Zhu, K., Hopwood, M. J. , Groenenberg, J. E., Engel, A. , Achterberg, E. P. and Gledhill, M. (2021) Influence of pH and Dissolved Organic Matter on Iron Speciation and Apparent Iron Solubility in the Peruvian Shelf and Slope Region. Environmental Science & Technology, 55 (13). pp. 9372-9383. DOI 10.1021/acs.est.1c02477.

Maßmig, M. and Engel, A. (2021) Dissolved Organic Matter in the Upwelling System off Peru: Imprints of Bacterial Activity and Water Mass Characteristics. Journal of Geophysical Research: Biogeosciences, 126 (6). Art.Nr. e2020JG006048. DOI 10.1029/2020JG006048.

Van Wambeke, F., Pulido, E. , Catala, P., Dinasquet, J. , Djaoudi, K., Engel, A. , Garel, M., Guasco, S., Marie, B. , Nunige, S., Taillandier, V. , Zäncker, B. and Tamburini, C. (2021) Spatial patterns of ectoenzymatic kinetics in relation to biogeochemical properties in the Mediterranean Sea and the concentration of the fluorogenic substrate used. Biogeosciences (BG), 18 (7). pp. 2301-2323. DOI 10.5194/bg-18-2301-2021.

Browning, T. J. , Al-Hashem, A. A., Hopwood, M. J. , Engel, A. , Belkin, I. M., Wakefield, E. D., Fischer, T. and Achterberg, E. P. (2021) Iron regulation of North Atlantic eddy phytoplankton productivity. Geophysical Research Letters, 48 (6). e2020GL091403. DOI 10.1029/2020GL091403.

Trueblood, J. V., Nicosia, A., Engel, A. , Zäncker, B., Rinaldi, M. , Freney, E. , Thyssen, M., Obernosterer, I., Dinasquet, J., Belosi, F. , Tovar-Sánchez, A. , Rodriguez-Romero, A. , Santachiara, G., Guieu, C. and Sellegri, K. (2021) A two-component parameterization of marine ice-nucleating particles based on seawater biology and sea spray aerosol measurements in the Mediterranean Sea. Atmospheric Chemistry and Physics, 21 (6). pp. 4659-4676. DOI 10.5194/acp-21-4659-2021.

Zäncker, B., Cunliffe, M. and Engel, A. (2021) Eukaryotic community composition in the sea surface microlayer across an east-west transect in the Mediterranean Sea. Biogeosciences (BG), 18 . pp. 2107-2021. DOI 10.5194/bg-18-2107-2021.

Maranon, E., Van Wambeke, F., Uitz, J., Boss, E. S., Dimier, C., Dinasquet, J., Engel, A. , Haëntjens, N., Perez-Lorenzo, M., Taillandier, V. and Zäncker, B. (2021) Deep maxima of phytoplankton biomass, primary production and bacterial production in the Mediterranean Sea. Biogeosciences (BG), 18 (5). pp. 1749-1767. DOI 10.5194/bg-18-1749-2021.

Bart, M. C. , Mueller, B. , Rombouts, T., Ven, C., Tompkins, G. J., Osinga, R., Brussaard, C. P. D., MacDonald, B., Engel, A. , Rapp, H. T. and Goeij, J. M. (2021) Dissolved organic carbon (DOC) is essential to balance the metabolic demands of four dominant North‐Atlantic deep‐sea sponges. Limnology and Oceanography, 66 . pp. 925-938. DOI 10.1002/lno.11652.

Browning, T. J. , Achterberg, E. P. , Engel, A. and Mawji , E. (2021) Manganese co-limitation of phytoplankton growth and major nutrient drawdown in the Southern Ocean. Nature Communications, 12 . Art.Nr. 884. DOI 10.1038/s41467-021-21122-6.

Piontek, J., Galgani, L. , Nöthig, E., Peeken, I. and Engel, A. (2021) Organic matter composition and heterotrophic bacterial activity at declining summer sea ice in the central Arctic Ocean. Limnology and Oceanography, 66 (S1). S343-S362. DOI 10.1002/lno.11639.

Sellegri, K., Nicosia, A., Freney, E., Uitz, J., Thyssen, M., Gregori, G., Engel, A. , Zäncker, B., Haëntjens, N., Mas, S., Picard, D., Saint-Macary, A., Peltola, M., Rose, C., Trueblood, J., Lefevre, D., D’Anna, B., Desboeufs, K., Meskhidze, N., Guieu, C. and Law, C. S. (2021) Surface ocean microbiota determine cloud precursors. Scientific Reports, 11 (1). Art.Nr. 281. DOI 10.1038/s41598-020-78097-5.

Triesch, N., van Pinxteren, M., Engel, A. and Herrmann, H. (2021) Concerted measurements of free amino acids at the Cabo Verde islands: high enrichments in submicron sea spray aerosol particles and cloud droplets. Atmospheric Chemistry and Physics, 21 (1). pp. 163-181. DOI 10.5194/acp-21-163-2021.

Grosse, J. , Endres, S. and Engel, A. (2020) Ocean acidification modifies biomolecule composition in organic matter through complex interactions. Scientific Reports, 10 (1). Art.Nr. 20599. DOI 10.1038/s41598-020-77645-3.

Loginova, A. N. , Dale, A. W. , Le Moigne, F. A. C. , Thomsen, S. , Sommer, S., Wallmann, K. and Engel, A. (2020) Sediment release of dissolved organic matter to the oxygen minimum zone off Peru. Biogeosciences (BG), 17 . pp. 4663-4679. DOI 10.5194/bg-17-4663-2020.

von Jackowski, A. , Grosse, J. , Nöthig, E. M. and Engel, A. (2020) Dynamics of organic matter and bacterial activity in the Fram Strait during summer and autumn. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 378 (2181). Art.Nr. 20190366. DOI 10.1098/rsta.2019.0366.

Zeppenfeld, S., van Pinxteren, M., Engel, A. and Herrmann, H. (2020) A protocol for quantifying mono- and polysaccharides in seawater and related saline matrices by electro-dialysis (ED) – combined with HPAEC-PAD. Ocean Science, 16 . pp. 817-830. DOI 10.5194/os-16-817-2020.

Franke, A., Blenckner, T., Duarte, C. M., Ott, K., Fleming, L. E., Antia, A., Reusch, T. B. H. , Bertram, C., Hein, J., Kronfeld-Goharani, U., Dierking, J. , Kuhn, A., Sato, C., van Doorn, E., Wall, M., Schartau, M. , Karez, R., Crowder, L., Keller, D. P. , Engel, A. , Hentschel, U. and Prigge, E. (2020) Operationalizing Ocean Health: Toward Integrated Research on Ocean Health and Recovery to Achieve Ocean Sustainability. One Earth, 2 (6). pp. 557-565. DOI 10.1016/j.oneear.2020.05.013.

Engel, A. , Endres, S. , Galgani, L. and Schartau, M. (2020) Marvelous Marine Microgels: On the Distribution and Impact of Gel-Like Particles in the Oceanic Water-Column. Frontiers in Marine Science, 7 . Art.Nr. 405. DOI 10.3389/fmars.2020.00405.

Browning, T. J. , Al-Hashem, A. A., Hopwood, M. J. , Engel, A. , Wakefield, E. D. and Achterberg, E. P. (2020) Nutrient regulation of late spring phytoplankton blooms in the midlatitude North Atlantic. Limnology and Oceanography, 65 (6). pp. 1136-1148. DOI 10.1002/lno.11376.

Laurenceau‐Cornec, E. C. , Le Moigne, F. A. C. , Gallinari, M., Moriceau, B., Toullec, J., Iversen, M. H., Engel, A. and De La Rocha, C. L. (2020) New guidelines for the application of Stokes' models to the sinking velocity of marine aggregates. Limnology and Oceanography, 65 (6). pp. 1264-1285. DOI 10.1002/lno.11388.

Wagner, S., Schubotz, F., Kaiser, K., Hallmann, C., Waska, H., Rossel, P. E., Hansman, R., Elvert, M., Middelburg, J. J., Engel, A. , Blattmann, T. M., Catalá, T. S., Lennartz, S. T., Gomez-Saez, G. V., Pantoja-Gutiérrez, S., Bao, R. and Galy, V. (2020) Soothsaying DOM: A Current Perspective on the Future of Oceanic Dissolved Organic Carbon. Frontiers in Marine Science, 7 . ARt.Nr. 341. DOI 10.3389/fmars.2020.00341.

Tovar-Sánchez, A., Rodríguez-Romero, A., Engel, A. , Zäncker, B., Fu, F., Marañón, E., Pérez-Lorenzo, M., Bressac, M., Wagener, T., Triquet, S., Siour, G., Desboeufs, K. and Guieu, C. (2020) Characterizing the surface microlayer in the Mediterranean Sea: trace metal concentrations and microbial plankton abundance. Biogeosciences (BG), 17 (8). pp. 2349-2364. DOI 10.5194/bg-17-2349-2020.

Stolle, C., Ribas-Ribas, M., Badewien, T. H., Barnes, J., Carpenter, L. J., Chance, R., Damgaard, L. R., Durán Quesada, A. M., Engel, A. , Frka, S., Galgani, L., Gašparović, B., Gerriets, M., Mustaffa, N. I. H., Herrmann, H., Kallajoki, L., Pereira, R., Radach, F., Revsbech, N. P., Rickard, P., Saint, A., Salter, M., Striebel, M., Triesch, N., Uher, G., Upstill-Goddard, R. C., van Pinxteren, M., Zäncker, B., Zieger, P. and Wurl, O. (2020) The MILAN campaign: Studying diel light effects on the air-sea interface. Bulletin of the American Meteorological Society, 101 (2). pp. 146-166. DOI 10.1175/BAMS-D-17-0329.1.

Maßmig, M., Lüdke, J. , Krahmann, G. and Engel, A. (2020) Bacterial degradation activity in the eastern tropical South Pacific oxygen minimum zone. Biogeosciences (BG), 17 . pp. 215-230. DOI 10.5194/bg-17-215-2020.

Zäncker, B., Engel, A. and Cunliffe, M. (2019) Bacterial communities associated with individual transparent exopolymer particles (TEP). Journal of Plankton Research, 41 (4). pp. 561-565. DOI 10.1093/plankt/fbz022.

Piontek, J., Endres, S. , Le Moigne, F. A. C. , Schartau, M. and Engel, A. (2019) Relevance of Nutrient-Limited Phytoplankton Production and Its Bacterial Remineralization for Carbon and Oxygen Fluxes in the Baltic Sea. Frontiers in Marine Science, 6 . Art.Nr. 581. DOI 10.3389/fmars.2019.00581.

Maßmig, M., Piontek, J., Le Moigne, F. A. C. , Cisternas-Novoa, C. and Engel, A. (2019) Potential role of oxygen and inorganic nutrients on microbial carbon turnover in the Baltic Sea. Aquatic Microbial Ecology, 83 . pp. 95-108. DOI 10.3354/ame01902.

Loginova, A. N. , Thomsen, S. , Dengler, M. , Lüdke, J. and Engel, A. (2019) Diapycnal dissolved organic matter supply into the upper Peruvian oxycline. Biogeosciences (BG), 16 (9). pp. 2033-2047. DOI 10.5194/bg-16-2033-2019.

Engel, A. , Bracher, A., Dinter, T., Endres, S. , Grosse, J. , Metfies, K., Peeken, I., Piontek, J., Salter, I. and Nöthig, E. M. (2019) Inter-Annual Variability of Organic Carbon Concentration in the Eastern Fram Strait During Summer (2009–2017). Frontiers in Marine Science, 6 . Art.Nr. 187. DOI 10.3389/fmars.2019.00187.

Thomsen, S. , Karstensen, J. , Kiko, R. , Krahmann, G. , Dengler, M. and Engel, A. (2019) Remote and local drivers of oxygen and nitrate variability in the shallow oxygen minimum zone off Mauritania in June 2014. Biogeosciences (BG), 16 (5). pp. 979-998. DOI 10.5194/bg-16-979-2019.

Cisternas-Novoa, C., Le Moigne, F. A. C. and Engel, A. (2019) Composition and Vertical Flux of Particulate Organic Matter to the Oxygen Minimum Zone of the Central Baltic Sea: Impact of a sporadic North Sea inflow. Biogeosciences (BG), 16 . pp. 927-947. DOI 10.5194/bg-16-927-2019.

Cisternas-Novoa, C., Lee, C., Tang, T., de Jesus, R. and Engel, A. (2019) Effects of Higher CO2 and Temperature on Exopolymer Particle Content and Physical Properties of Marine Aggregates. Frontiers in Marine Science, 5 . Art.Nr. 500. DOI 10.3389/fmars.2018.00500.

Fadeev, E., Salter, I., Schourup-Kristensen, V., Nöthig, E. M., Metfies, K., Engel, A. , Piontek, J., Boetius, A. and Bienhold, C. (2018) Microbial Communities in the East and West Fram Strait During Sea Ice Melting Season. Frontiers in Marine Science, 5 . Art.Nr. 429. DOI 10.3389/fmars.2018.00429.

Zäncker, B., Cunliffe, M. and Engel, A. (2018) Bacterial Community Composition in the Sea Surface Microlayer Off the Peruvian Coast. Frontiers in Microbiology, 9 . Art.Nr. 2699. DOI 10.3389/fmicb.2018.02699.

Galgani, L., Engel, A. , Rossi, C., Donati, A. and Loiselle, S. A. (2018) Polystyrene microplastics increase microbial release of marine Chromophoric Dissolved Organic Matter in microcosm experiments. Scientific Reports, 8 (1). Art.Nr. 14635. DOI 10.1038/s41598-018-32805-4.

Michels, J., Stippkugel, A., Lenz, M., Wirtz, K. and Engel, A. (2018) Rapid aggregation of biofilm-covered microplastics with marine biogenic particles. Proceedings of the Royal Society B: Biological Sciences, 285 (1885). p. 20181203. DOI 10.1098/rspb.2018.1203.

Sun, C. C., Sperling, M. and Engel, A. (2018) Effect of wind speed on the size distribution of gel particles in the sea surface microlayer: insights from a wind–wave channel experiment. Biogeosciences (BG), 15 . pp. 3577-3589. DOI 10.5194/bg-15-3577-2018.

Yue, W. z., Sun, C. c., Shi, P., Engel, A. , Wang, Y. s. and He, W. H. (2018) Effect of temperature on the accumulation of marine biogenic gels in the surface microlayer near the outlet of nuclear power plants and adjacent areas in the Daya Bay, China. PLoS ONE, 13 (6). e0198735. DOI 10.1371/journal.pone.0198735.

Engel, A. , Sperling, M., Sun, C., Grosse, J. and Friedrichs, G. (2018) Organic Matter in the Surface Microlayer: Insights From a Wind Wave Channel Experiment. Frontiers in Marine Science, 5 . Art.Nr. 182. DOI 10.3389/fmars.2018.00182.

Browning, T. J. , Achterberg, E. P. , Rapp, I., Engel, A. , Bertrand, E. M., Tagliabue, A. and Moore, C. M. (2017) Nutrient co-limitation at the boundary of an oceanic gyre. Nature, 551 (7679). pp. 242-246. DOI 10.1038/nature24063.

Dreshchinskii, A. and Engel, A. (2017) Seasonal variations of the sea surface microlayer at the Boknis Eck Times Series Station (Baltic Sea). Journal of Plankton Research, 39 (6). pp. 943-961. DOI 10.1093/plankt/fbx055.

Engel, A. , Piontek, J., Metfies, K., Endres, S. , Sprong, P., Peeken, I., Gäbler-Schwarz, S. and Nöthig, E. M. (2017) Inter-annual variability of transparent exopolymer particles in the Arctic Ocean reveals high sensitivity to ecosystem changes. Scientific Reports, 7 (1). Art.Nr. 4129. DOI 10.1038/s41598-017-04106-9.

Busch, K., Endres, S. , Iversen, M. H., Michels, J., Nöthig, E. M. and Engel, A. (2017) Bacterial Colonization and Vertical Distribution of Marine Gel Particles (TEP and CSP) in the Arctic Fram Strait. Frontiers in Marine Science, 4 (Art.No. 166). DOI 10.3389/fmars.2017.00166.

Engel, A. , Bange, H. W. , Cunliffe, M., Burrows, S. M., Friedrichs, G., Galgani, L., Herrmann, H., Hertkorn, N., Johnson, M., Liss, P. S., Quinn, P. K., Schartau, M. , Soloviev, A., Stolle, C., Upstill-Goddard, R. C., van Pinxteren, M. and Zäncker, B. (2017) The Ocean's Vital Skin: Toward an Integrated Understanding of the Sea Surface Microlayer. Frontiers in Marine Science, 4 . Art.Nr. 165. DOI 10.3389/fmars.2017.00165.

Browning, T. , Achterberg, E. P. , Yong, J. C., Rapp, I., Utermann, C., Engel, A. and Moore, C. M. (2017) Iron limitation of microbial phosphorus acquisition in the tropical North Atlantic. Nature Communications, 8 (15465). DOI 10.1038/ncomms15465.

Engel, A. , Wagner, H., Le Moigne, F. A. C. and Wilson, S. T. (2017) Particle export fluxes to the oxygen minimum zone of the Eastern Tropical North Atlantic. Biogeosciences (BG), 14 (7). pp. 1825-1838. DOI 10.5194/bg-14-1825-2017.

Schulz, K. G., Bach, L. T. , Bellerby, R. G. J., Bermudez, R., Büdenbender, J., Boxhammer, T. , Czerny, J., Engel, A. , Ludwig, A., Meyerhöfer, M., Larsen, A., Paul, A. J., Sswat, M. and Riebesell, U. (2017) Phytoplankton Blooms at Increasing Levels of Atmospheric Carbon Dioxide: Experimental Evidence for Negative Effects on Prymnesiophytes and Positive on Small Picoeukaryotes. Frontiers in Marine Science, 4 . Art.Nr. 64. DOI 10.3389/fmars.2017.00064.

Sperling, M., Piontek, J., Engel, A. , Wiltshire, K. H., Niggemann, J., Gerdts, G. and Wichels, A. (2017) Combined Carbohydrates Support Rich Communities of Particle-Associated Marine Bacterioplankton. Frontiers in Microbiology, 8 . Art.Nr. 65. DOI 10.3389/fmicb.2017.00065.

Le Moigne, F. A. C. , Cisternas-Novoa, C., Piontek, J., Massmig, M. and Engel, A. (2017) On the effect of low oxygen concentrations on bacterial degradation of sinking particles. Scientific Reports, 7 (1). Art. No. 16722. DOI 10.1038/s41598-017-16903-3.

Zäncker, B., Bracher, A., Röttgers, R. and Engel, A. (2017) Variations of the Organic Matter Composition in the Sea Surface Microlayer: A Comparison between Open Ocean, Coastal, and Upwelling Sites Off the Peruvian Coast. Frontiers in Microbiology, 8 . Art.No. 2369. DOI 10.3389/fmicb.2017.02369.

Bergen, B., Endres, S. , Engel, A. , Zark, M., Dittmar, T., Sommer, U. and Jürgens, K. (2016) Acidification and warming affect prominent bacteria in two seasonal phytoplankton bloom mesocosms. Environmental Microbiology, 18 (12). pp. 4579-4595. DOI 10.1111/1462-2920.13549.

Loginova, A. N. , Thomsen, S. and Engel, A. (2016) Chromophoric and fluorescent dissolved organic matter in and above the oxygen minimum zone off Peru. Journal of Geophysical Research: Oceans, 121 (11). pp. 7973-7990. DOI 10.1002/2016JC011906.

Hepach, H. , Quack, B., Tegtmeier, S., Engel, A. , Bracher, A., Fuhlbrügge, S., Galgani, L., Atlas, E., Lampel, J., Frieß, U. and Krüger, K. (2016) Biogenic halocarbons from the Peruvian upwelling region as tropospheric halogen source. Atmospheric Chemistry and Physics, 16 . pp. 12219-12237. DOI 10.5194/acp-16-12219-2016.

Thomsen, S. , Kanzow, T., Colas, F., Echevin, V., Krahmann, G. and Engel, A. (2016) Do submesoscale frontal processes ventilate the oxygen minimum zone off Peru?. Geophysical Research Letters, 43 (15). S367-S386. DOI 10.1002/2016GL070548.

Galgani, L., Piontek, J. and Engel, A. (2016) Biopolymers form a gelatinous microlayer at the air-sea interface when Arctic sea ice melts. Scientific Reports, 6 (Article nr. 29465). DOI 10.1038/srep29465.

Löscher, C., Bange, H. W. , Schmitz, R. A., Callbeck, C. M., Engel, A. , Hauss, H. , Kanzow, T., Kiko, R. , Lavik, G., Loginova, A. N. , Melzner, F., Meyer, J., Neulinger, S. C., Pahlow, M., Riebesell, U. , Schunck, H., Thomsen, S. and Wagner, H. (2016) Water column biogeochemistry of oxygen minimum zones in the eastern tropical North Atlantic and eastern tropical South Pacific Oceans. Biogeosciences (BG), 13 . pp. 3585-3606. DOI 10.5194/bg-13-3585-2016.

Galgani, L. and Engel, A. (2016) Changes in optical characteristics of surface microlayers hint to photochemically and microbially mediated DOM turnover in the upwelling region off the coast of Peru. Biogeosciences (BG), 13 . pp. 2453-2473. DOI 10.5194/bg-13-2453-2016.

Engel, A. and Galgani, L. (2016) The organic sea-surface microlayer in the upwelling region off the coast of Peru and potential implications for air–sea exchange processes. Biogeosciences (BG), 13 (4). pp. 989-1007. DOI 10.5194/bg-13-989-2016.

Nöthig, E. M., Bracher, A., Engel, A. , Metfies, K., Niehoff, B., Peeken, I., Bauerfeind, E., Cherkasheva, A., Gäbler-Schwarz, S., Hardge, K., Kilias, E., Kraft, A., Mebrahtom Kidane, Y., Lalande, C., Piontek, J., Thomisch, K. and Wurst, M. (2015) Summertime plankton ecology in Fram Strait - a compilation of long- and short-term observations. Polar Research, 34 (23349). DOI 10.3402/polar.v34.23349.

Loginova, A. N. , Borchard, C., Meyer, J., Hauss, H. , Kiko, R. and Engel, A. (2015) Effects of nitrate and phosphate supply on chromophoric and fluorescent dissolved organic matter in the Eastern Tropical North Atlantic: a mesocosm study. Biogeosciences (BG), 12 . pp. 6897-6914. DOI 10.5194/bg-12-6897-2015.

Chow, J. S., Lee, C. and Engel, A. (2015) The influence of extracellular polysaccharides, growth rate, and free coccoliths on the coagulation efficiency of Emiliania huxleyi. Marine Chemistry, 175 . pp. 5-17. DOI 10.1016/j.marchem.2015.04.010.

Cisternas-Novoa, C., Lee, C. and Engel, A. (2015) Transparent exopolymer particles (TEP) and Coomassie stainable particles (CSP): Differences between their origin and vertical distributions in the ocean. Marine Chemistry, 175 . pp. 56-71. DOI 10.1016/j.marchem.2015.03.009.

Engel, A. , Borchard, C., Loginova, A. N. , Meyer, J., Hauss, H. and Kiko, R. (2015) Effects of varied nitrate and phosphate supply on polysaccharidic and proteinaceous gel particles production during tropical phytoplankton bloom experiments. Biogeosciences (BG), 12 . pp. 5647-5665. DOI 10.5194/bg-12-5647-2015.

Piontek, J., Sperling, M., Nöthig, E. M. and Engel, A. (2015) Multiple environmental changes induce interactive effects on bacterial degradation activity in the Arctic Ocean. Limnology and Oceanography, 60 (4). pp. 1392-1410. DOI 10.1002/lno.10112.

Kreus, M., Schartau, M. , Engel, A. , Nausch, M. and Voss, M. (2015) Variations in the elemental ratio of organic matter in the central Baltic Sea: Part I—Linking primary production to remineralization. Continental Shelf Research, 100 . pp. 25-45. DOI 10.1016/j.csr.2014.06.015.

Biermann, A., Lewandowska, A. M., Engel, A. and Riebesell, U. (2015) Organic matter partitioning and stoichiometry in response to rising water temperature and copepod grazing. Marine Ecology Progress Series, 522 . pp. 49-65. DOI 10.3354/meps11148.

Borchard, C. and Engel, A. (2015) Size-fractionated dissolved primary production and carbohydrate composition of the coccolithophore Emiliania huxleyi. Biogeosciences (BG), 12 . pp. 1271-1284. DOI 10.5194/bg-12-1271-2015.

Galgani, L., Stolle, C., Endres, S. , Schulz, K. G. and Engel, A. (2014) Effects of ocean acidification on the biogenic composition of the sea-surface microlayer: Results from a mesocosm study. Journal of Geophysical Research: Oceans, 119 (11). pp. 7911-7924. DOI 10.1002/2014JC010188.

Cisternas-Novoa, C., Lee, C. and Engel, A. (2014) A semi-quantitative spectrophotometric, dye-binding assay for determination of Coomassie Blue stainable particles. Limnology and Oceanography: Methods, 12 . pp. 604-616. DOI 10.4319/lom.2014.12.604.

Engel, A. , Cisternas Novoa, C., Wurst, M., Endres, S. , Tang, T., Schartau, M. and Lee, C. (2014) No detectable effect of CO2 on elemental stoichiometry of Emiliania huxleyi in nutrient-limited, acclimated continuous cultures. Marine Ecology Progress Series, 507 . pp. 15-30. DOI 10.3354/meps10824.

Pavlov, A. K., Silyakova, A., Granskog, M. A., Bellerby, R. G. J., Engel, A. , Schulz, K. G. and Brussaard, C. P. D. (2014) Marine CDOM accumulation during a coastal Arctic mesocosm experiment: No response to elevated pCO2levels. Journal of Geophysical Research: Biogeosciences, 119 (6). pp. 1216-1230. DOI 10.1002/2013JG002587.

Endres, S. , Galgani, L., Riebesell, U. , Schulz, K. G. and Engel, A. (2014) Stimulated Bacterial Growth under Elevated p Co2: Results from an Off-Shore Mesocosm Study. PLoS ONE, 9 (6). e99228. DOI 10.1371/journal.pone.0099228.

Engel, A. , Piontek, J., Grossart, H. P., Riebesell, U. , Schulz, K. G. and Sperling, M. (2014) Impact of CO2 enrichment on organic matter dynamics during nutrient induced coastal phytoplankton blooms. Journal of Plankton Research, 36 (3). pp. 641-657. DOI 10.1093/plankt/fbt125.

Krause, S., Aloisi, G., Engel, A. , Liebetrau, V. and Treude, T. (2014) Enhanced calcite dissolution in the presence of the Aerobic Methanotroph Methylosinus trichosporium. Geomicrobiology Journal, 31 (4). pp. 325-337. DOI 10.1080/01490451.2013.834007.

Piontek, J., Sperling, M., Nöthig, E. M. and Engel, A. (2014) Regulation of bacterioplankton activity in Fram Strait (Arctic Ocean) during early summer: The role of organic matter supply and temperature. Journal of Marine Systems, 132 . pp. 83-94. DOI 10.1016/j.jmarsys.2014.01.003.

Biermann, A., Engel, A. and Riebesell, U. (2014) Changes in organic matter cycling in a plankton community exposed to warming under different light intensities. Journal of Plankton Research, 36 (3). pp. 658-671. DOI 10.1093/plankt/fbu005.

Archer, S. D., Kimmance, S. A., Stephens, J. A., Hopkins, F. E., Bellerby, R. G. J., Schulz, K. G., Piontek, J. and Engel, A. (2013) Contrasting responses of DMS and DMSP to ocean acidification in Arctic waters. Biogeosciences (BG), 10 . pp. 1893-1908. DOI 10.5194/bg-10-1893-2013.

Assmy, P., Ehn, J. K., Fernández-Méndez, M., Hop, H., Katlein, C., Sundfjord, A., Bluhm, K., Daase, M., Engel, A. , Fransson, A., Granskog, M. A., Hudson, S. R., Kristiansen, S., Nicolaus, M., Peeken, I., Renner, A. H. H., Spreen, G., Tatarek, A. and Wiktor, J. (2013) Floating Ice-Algal Aggregates below Melting Arctic Sea Ice. PLoS ONE, 8 (10). e76599. DOI 10.1371/journal.pone.0076599.

Cunliffe, M., Engel, A. , Frka, S., Gašparović, B., Guitart, C., Murrell, J. C., Salter, M., Stolle, C., Upstill-Goddard, R. and Wurl, O. (2013) Sea surface microlayers: A unified physicochemical and biological perspective of the air–ocean interface. Progress in Oceanography, 109 . pp. 104-116. DOI 10.1016/j.pocean.2012.08.004.

Czerny, J., Schulz, K. G., Boxhammer, T. , Bellerby, R. G. J., Büdenbender, J., Engel, A. , Krug, S., Ludwig, A., Nachtigall, K., Nondal, G., Niehoff, B., Silyakova, A. and Riebesell, U. (2013) Implications of elevated CO2 on pelagic carbon fluxes in an Arctic mesocosm study – an elemental mass balance approach. Biogeosciences (BG), 10 (5). pp. 3109-3125. DOI 10.5194/bg-10-3109-2013.

Endres, S. , Unger, J., Wannicke, N., Nausch, M., Voss, M. and Engel, A. (2013) Response of Nodularia spumigena to pCO2 – Part 2: Exudation and extracellular enzyme activities. Biogeosciences (BG), 10 . pp. 567-582. DOI 10.5194/bg-10-567-2013.

Engel, A. , Borchard, C., Piontek, J., Schulz, K. G., Riebesell, U. and Bellerby, R. (2013) CO2 increases 14C-primary production in an Arctic plankton community. Biogeosciences (BG), 10 (3). pp. 1291-1308. DOI 10.5194/bg-10-1291-2013.

Galgani, L. and Engel, A. (2013) Accumulation of Gel Particles in the Sea-Surface Microlayer during an Experimental Study with the Diatom Thalassiosira weissflogii. International Journal of Geosciences, 04 (01). pp. 129-145. DOI 10.4236/ijg.2013.41013.

Piontek, J., Borchard, C., Sperling, M., Schulz, K. G., Riebesell, U. and Engel, A. (2013) Response of bacterioplankton activity in an Arctic fjord system to elevated pCO2: results from a mesocosm perturbation study. Biogeosciences (BG), 10 . pp. 297-314. DOI 10.5194/bg-10-297-2013.

Schulz, K. G., Bellerby, R. G. J., Brussaard, C. P. D., Büdenbender, J., Czerny, J., Engel, A. , Fischer, M., Koch-Klavsen, S., Krug, S., Lischka, S. , Ludwig, A., Meyerhöfer, M., Nondal, G., Silyakova, A., Stuhr, A. and Riebesell, U. (2013) Temporal biomass dynamics of an Arctic plankton bloom in response to increasing levels of atmospheric carbon dioxide. Biogeosciences (BG), 10 . pp. 161-180. DOI 10.5194/bg-10-161-2013.

Silyakova, A., Bellerby, R. G. J., Schulz, K. G., Czerny, J., Tanaka, T., Nondal, G., Riebesell, U. , Engel, A. , De Lange, T. and Ludwig, A. (2013) Pelagic community production and carbon-nutrient stoichiometry under variable ocean acidification in an Arctic fjord. Biogeosciences (BG), 10 . pp. 4847-4859. DOI 10.5194/bg-10-4847-2013.

Sperling, M., Piontek, J., Gerdts, G., Wichels, A., Schunck, H., Roy, A. S., LaRoche, J., Gilbert, J., Bittner, L., Romac, S., Riebesell, U. and Engel, A. (2013) Effect of elevated CO2 on the dynamics of particle attached and free living bacterioplankton communities in an Arctic fjord. Biogeosciences (BG), 10 . pp. 181-191. DOI 10.5194/bg-10-181-2013.

Unger, J., Endres, S. , Wannicke, N., Engel, A. , Voss, M., Nausch, G. and Nausch, M. (2013) Response of Nodularia spumigena to pCO2 - Part 3: Turnover of phosphorus compounds. Biogeosciences (BG), 10 . pp. 1483-1499. DOI 10.5194/bg-10-1483-2013.

Borchard, C. and Engel, A. (2012) Organic matter exudation by Emiliania huxleyi under simulated future ocean conditions. Biogeosciences (BG), 9 (8). pp. 3405-3423. DOI 10.5194/bg-9-3405-2012.

Engel, A. , Harlay, J., Piontek, J. and Chou, L. (2012) Contribution of combined carbohydrates to dissolved and particulate organic carbon after the spring bloom in the northern Bay of Biscay (North-Eastern Atlantic Ocean). Continental Shelf Research, 45 . pp. 42-53. DOI 10.1016/j.csr.2012.05.016.

Wannicke, N., Endres, S. , Engel, A. , Grossart, H. P., Nausch, M., Unger, J. and Voss, M. (2012) Response of Nodularia spumigena to pCO2 – Part 1: Growth, production and nitrogen cycling. Biogeosciences (BG), 9 (8). pp. 2973-2988. DOI 10.5194/bg-9-2973-2012.

Wohlers-Zöllner, J., Biermann, A., Engel, A. , Dörge, P., Lewandowska, A. M., Scheibner, M. and Riebesell, U. (2012) Effects of rising temperature on pelagic biogeochemistry in mesocosm systems: a comparative analysis of the AQUASHIFT Kiel experiments. Marine Biology, 159 . pp. 2503-2518. DOI 10.1007/s00227-012-1958-x.

Borchard, C., Borges, A., Händel, N. and Engel, A. (2011) Biogeochemical response of Emiliania huxleyi (PML B92/11) to elevated CO2 and temperature under phosphorous limitation: a chemostat study. Journal of Experimental Marine Biology and Ecology, 410 . pp. 61-71. DOI 10.1016/j.jembe.2011.10.004.

Engel, A. and Händel, N. (2011) A novel protocol for determining the concentration and composition of sugars in particulate and in high molecular weight dissolved organic matter (HMW-DOM) in seawater. Marine Chemistry, 127 . pp. 180-191. DOI 10.1016/j.marchem.2011.09.004.

Engel, A. , Händel, N., Wohlers, J., Lunau, M., Grossart, H. P., Sommer, U. and Riebesell, U. (2011) Effects of sea surface warming on the production and composition of dissolved organic matter during phytoplankton blooms: results from a mesocosm study. Journal of Plankton Research, 33 (3). pp. 357-372. DOI 10.1093/plankt/fbq122.

Harlay, J., Chou, L., De Bodt, C., Van Oostende, N., Piontek, J., Suykens, K., Engel, A. , Sabbe, K., Groom, S., Delille, B. and Borges, A. V. (2011) Biogeochemistry and carbon mass balance of a coccolithophore bloom in the northern Bay of Biscay (June 2006). Deep Sea Research Part I: Oceanographic Research Papers, 58 (2). pp. 111-127. DOI 10.1016/j.dsr.2010.11.005.

Kim, J. M., Lee, K., Shin, K., Yang, E. J., Engel, A. , Karl, D. M. and Kim, H. C. (2011) Shifts in biogenic carbon flow from particulate to dissolved forms under high carbon dioxide and warm ocean conditions. Geophysical Research Letters, 38 (8). DOI 10.1029/2011GL047346.

Piontek, J., Handel, N., de Bodt, C., Harlay, J., Chou, L. and Engel, A. (2011) The utilization of polysaccharides by heterotrophic bacterioplankton in the Bay of Biscay (North Atlantic Ocean). Journal of Plankton Research, 33 (11). pp. 1719-1735. DOI 10.1093/plankt/fbr069.

Biermann, A. and Engel, A. (2010) Effect of CO2 on the properties and sinking velocity of aggregates of the coccolithophore Emiliania huxleyi. Biogeosciences (BG), 7 (3). pp. 1017-1029. DOI 10.5194/bg-7-1017-2010.

Levin, I., Naegler, T., Heinz, R., Osusko, D., Cuevas, E., Engel, A. , Ilmberger, J., Langenfelds, R. L., Neininger, B., Rohden, C. v., Steele, L. P., Weller, R., Worthy, D. E. and Zimov, S. A. (2010) The global SF6 source inferred from long-term high precision atmospheric measurements and its comparison with emission inventories. Atmospheric Chemistry and Physics, 10 (6). pp. 2655-2662. DOI 10.5194/acp-10-2655-2010.

Piontek, J., Lunau, M., Händel, N., Borchard, C., Wurst, M. and Engel, A. (2010) Acidification increases microbial polysaccharide degradation in the ocean. Biogeosciences (BG), 7 (5). pp. 1615-1624. DOI 10.5194/bg-7-1615-2010.

Egge, J., Thingstad, T., Larsen, A., Engel, A. , Wohlers, J., Bellerby, R. G. J. and Riebesell, U. (2009) Primary production during nutrient-induced blooms at elevated CO2 concentrations. Biogeosciences (BG), 6 . pp. 877-885.

Engel, A. , Abramson, L., Szlosek, J., Liu, Z., Stewart, G., Hirschberg, D. and Lee, C. (2009) Investigating the effect of ballasting by CaCO3 in Emiliania huxleyi, II: Decomposition of particulate organic matter. Deep-Sea Research Part II-Topical Studies in Oceanography, 56 (18). pp. 1408-1419. DOI 10.1016/j.dsr2.2008.11.028.

Engel, A. , Szlosek, J., Abramson, L., Liu, Z. and Lee, C. (2009) Investigating the effect of ballasting by CaCO3 in Emiliania huxleyi: I. Formation, settling velocities and physical properties of aggregates. Deep-Sea Research Part II-Topical Studies in Oceanography, 56 (18). pp. 1396-1407. DOI 10.1016/j.dsr2.2008.11.027.

Harlay, J., De Bodt, C., Engel, A. , Jansen, S., d’Hoop, Q., Piontek, J., Van Oostende, N., Groom, S., Sabbe, K. and Chou, L. (2009) Abundance and size distribution of transparent exopolymer particles (TEP) in a coccolithophorid bloom in the northern Bay of Biscay. Deep-Sea Research Part I-Oceanographic Research Papers, 56 (8). pp. 1251-1265. DOI 10.1016/j.dsr.2009.01.014.

Lee, C., Armstrong, R. A., Cochran, J. K., Engel, A. , Fowler, S. W., Goutx, M., Masqué, P., Miquel, J. C., Peterson, M. and Tamburini, C. (2009) MedFlux: Investigations of particle flux in the Twilight Zone. Deep-Sea Research Part II-Topical Studies in Oceanography, 56 (18). pp. 1363-1368. DOI 10.1016/j.dsr2.2008.12.003.

Payan, S., Camy-Peyret, C., Oelhaf, H., Wetzel, G., Maucher, G., Keim, C., Pirre, M., Huret, N., Engel, A. , Volk, M. C., Kuellmann, H., Kuttippurath, J., Cortesi, U., Bianchini, G., Mencaraglia, F., Raspollini, P., Redaelli, G., Vigouroux, C., De Mazière, M., Mikuteit, S., Blumenstock, T., Velazco, V., Notholt, J., Mahieu, E., Duchatelet, P., Smale, D., Wood, S., Jones, N., Piccolo, C., Payne, V., Bracher, A., Glatthor, N., Stiller, G., Grunow, K., Jeseck, P., Te, Y. and Butz, A. (2009) Validation of version-4.61 methane and nitrous oxide observed by MIPAS. Atmospheric Chemistry and Physics, 9 (2). pp. 413-442. DOI 10.5194/acp-9-413-2009.

Piontek, J., Händel, N., Langer, G., Wohlers, J., Riebesell, U. and Engel, A. (2009) Effects of rising temperature on the formation and microbial degradation of marine diatom aggregates. Aquatic Microbial Ecology, 54 . pp. 305-318. DOI 10.3354/ame01273.

Wohlers, J., Engel, A. , Zöllner, E., Breithaupt, P., Jürgens, K., Hoppe, H. G., Sommer, U. and Riebesell, U. (2009) Changes in biogenic carbon flow in response to sea surface warming. PNAS Proceedings of the National Academy of Sciences of the United States of America, 106 (17). pp. 7067-7072. DOI 10.1073/pnas.0812743106.

Engel, A. , Schulz, K. G., Riebesell, U. , Bellerby, R. G. J., Delille, B. and Schartau, M. (2008) Effects of CO2 on particle size distribution and phytoplankton abundance during a mesocosm bloom experiment (PeECE II). Biogeosciences (BG), 5 (2). pp. 509-521. DOI 10.5194/bg-5-509-2008.

Riebesell, U. , Bellerby, R., Engel, A. , Fabry, V. J., Hutchins, D. A., Reusch, T. B. H. , Schulz, K. G. and Morel, F. M. M. (2008) Comment on "Phytoplankton Calcification in a High-CO2 World". Science, 322 (1466b). DOI 10.1126/science.1161096.

Benthien, A., Zondervan, I., Engel, A. , Hefter, J., Terbrüggen, A. and Riebesell, U. (2007) Carbon isotopic fractionation during a mesocosm bloom experiment dominated by Emiliania huxleyi: Effects of CO2 concentration and primary production. Geochimica et Cosmochimica Acta, 71 . pp. 1528-1541. DOI 10.1016/j.gca.2006.12.015.

Grossart, H., Engel, A. , Arnosti, C., De La Rocha, C. L., Murray, A. E. and Passow, U. (2007) Microbial dynamics in autotrophic and heterotrophic seawater mesocosms. III. Organic matter fluxes. Aquatic Microbial Ecology, 49 . pp. 143-156. DOI 10.3354/ame01140.

Passow, U., De La Rocha, C. L., Arnosti, C., Grossart, H., Murray, A. E. and Engel, A. (2007) Microbial dynamics in autotrophic and heterotrophic seawater mesocosms. I. Effect of phytoplankton on the microbial loop. Aquatic Microbial Ecology, 49 . pp. 109-121. DOI 10.3354/ame01138.

Schartau, M. , Engel, A. , Schröter, J., Thoms, S., Völker, C. and Wolf-Gladrow, D. (2007) Modelling carbon overconsumption and the formation of extracellular particulate organic carbon. Biogeosciences (BG), 4 (4). pp. 433-454. DOI 10.5194/bg-4-433-2007.

Sommer, U., Aberle, N., Engel, A. , Hansen, T., Lengfellner, K., Sandow, M., Wohlers, J., Zöllner, E. and Riebesell, U. (2007) An indoor mesocosm system to study the effect of climate change on the late winter and spring succession of Baltic Sea phyto- and zooplankton. Oecologia, 150 (4). pp. 655-667. DOI 10.1007/s00442-006-0539-4.

Engel, A. , Zondervan, I., Aerts, K., Beaufort, L., Benthien, A., Chou, L., Delille, B., Gattuso, J. P., Harley, J., Heemann, C., Hoffmann, L., Jacquet, S., Nejstgaard, J., Pizay, M. D., Rochelle-Newall, E., Schneider, U., Terbrüggen, A. and Riebesell, U. (2005) Testing the direct effect of CO2 concentration on a bloom of the coccolithophorid Emiliania huxleyi in mesocosm experiments. Limnology and Oceanography, 50 . pp. 493-504. DOI 10.4319/lo.2005.50.2.0493.

Engel, A. (2004) Distribution of transparent exopolymer particles (TEP) in the northeast Atlantic Ocean and their potential significance for aggregation processes. Deep Sea Research Part I: Oceanographic Research Papers, 51 (1). pp. 83-92. DOI 10.1016/j.dsr.2003.09.001.

Engel, A. , Delille, B., Jacquet, S., Riebesell, U. , Rochelle-Newall, E., Terbrüggen, A. and Zondervan, I. (2004) Transparent exopolymer particles and dissolved organic carbon production by Emiliania huxleyi exposed to different CO2 concentrations: a mesocosm experiment. Aquatic Microbial Ecology, 34 (1). pp. 93-104. DOI 10.3354/ame034093.

Engel, A. , Thoms, S., Riebesell, U. , Rochelle-Newall, E. and Zondervan, I. (2004) Polysaccharide aggregation as a potential sink of marine dissolved organic carbon. Nature, 428 . pp. 929-932. DOI 10.1038/nature02453.

Schneider, B., Engel, A. and Schlitzer, R. (2004) Effects of depth- and CO2-dependent C:N ratios of particulate organic matter (POM) on the marine carbon cycle. Global Biogeochemical Cycles, 18 (2). GB2015. DOI 10.1029/2003GB002184.

Passow, U., Engel, A. and Ploug, H. (2003) The role of aggregation for the dissolution of diatom frustules. FEMS Microbiology Ecology, 46 (3). pp. 247-255. DOI 10.1016/S0168-6496(03)00199-5.

Engel, A. (2002) Direct relationship between CO2 uptake and transparent exopolymer particles production in natural phytoplankton. Journal of Plankton Research, 24 (1). pp. 49-53. DOI 10.1093/plankt/24.1.49.

Engel, A. , Goldthwait, S., Passow, U. and Alldredge, A. (2002) Temporal decoupling of carbon and nitrogen dynamics in a mesocosm diatom bloom. Limnology and Oceanography, 47 (3). pp. 753-761. DOI 10.4319/lo.2002.47.3.0753.

Engel, A. , Meyerhöfer, M. and von Bröckel, K. (2002) Chemical and biological composition of suspended particles and aggregates in the Baltic Sea in summer (1999).. Estuarine, Coastal and Shelf Science, 55 . pp. 729-741. DOI 10.1006/ecss.2001.0927.

Engel, A. and Passow, U. (2001) Carbon and nitrogen content of transparent exopolymer particles (TEP) in relation to their Alcian Blue adsorption. Marine Ecology Progress Series, 219 . pp. 1-10. DOI 10.3354/meps219001.

Krembs, C. and Engel, A. (2001) Abundance and variability of microorganisms and transparent exopolymer particles across the ice-water interface of melting first-year sea ice in the Laptev Sea (Arctic). Marine Biology, 138 (1). pp. 173-185. DOI 10.1007/s002270000396.

Engel, A. (2000) The role of transparent exopolymer particles (TEP) in the increase in apparent particle stickiness (alpha) during the decline of a diatom bloom. Journal of Plankton Research, 22 (3). pp. 485-497. DOI 10.1093/plankt/22.3.485.

Engel, A. and Schartau, M. (1999) Influence of transparent expolymer particles (TEP) on sinking velocity of Nitzschia closterum aggregates. Marine Ecology Progress Series, 182 . pp. 69-76. DOI 10.3354/meps182069.

Galgani, L. and Engel, A. (2012) The ocean has a gel-like skin made of proteins. SOLAS News, 14 . pp. 7-8.

Engel, A. and Nöthig, E. M. (2009) Future carbon cycling in the Arctic Ocean. iLEAPS Newsletter, 8 . pp. 24-27.

Engel, A. (2023) Ozeane im Wandel. In: Heidelberger Standards der Klimamedizin. , ed. by Nikendei, C., Bugaj, T. J., Cranz, A., Herrmann, A. and Tabatabai, J.. HeiCuMed, Heidelberg, Germany, pp. 26-31.

Niehoff, B., Bauerfeind, E., Knüppel, N., Wiegmann, S., Busch, K., Endres, S. , Ramirez Perez, M., Weinisch, L., Bracher, A., Metfies, K., Nöthig, E. M., Peeken, I., Engel, A. and Stoeck, T. (2015) Plankton Ecology and Biogeochemistry in a Changing Arctic Ocean (PEBCAO). In: The Expedition PS93.2 of the Research Vessel POLARSTERN to the Fram Strait in 2015. , ed. by Bornemann, H.. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 693 . Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany, pp. 38-42. DOI 10.2312/BzPM_0693_2015.

Engel, A. , Laß, K., Wurl, O. and Latif, M. T. (2014) Descriptive indicators for surface conditions. In: Guide to best practices to study the ocean's surface. , ed. by Cunliffe, M. and Wurl, O.. Occasional Publications of the Marine Biological Association of the United Kingdom . Marine Biological Association of the United Kingdom, Plymouth, UK, pp. 96-101.

Galgani, L., Roa, J. and Engel, A. (2013) Sea-surface microlayer. In: Surface Ocean – Lower Atmosphere Study (SOLAS) in the upwelling region off Peru - Cruise No. M91 – December 01 – December 26, 2012 – Callao (Peru) – Callao (Peru). , ed. by Bange, H. W.. Meteor-Berichte, M91 . DFG Senatskommision für Ozeanographie, Bremen, Germany, pp. 36-37, 69 pp. DOI 10.2312/cr_m91.

Lalande, C., Xiao, X., Oetjen, K., Peeken, I., Fernandez-Mendez, M., David, C., Flores, H., Piontek, J., Galgani, L., Nöthig, E., Niehoff, B., Metfies, K. and Engel, A. (2013) Plankton Ecology. In: The Expedition of the Research Vessel "Polarstern" to the Arctic in 2012 (ARK XXVII/3). , ed. by Boetius, A.. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 663 . Alfred-Wegener-Institut Helmholtz-Zentrum für Polarund Meeresforschung, Bremerhaven, Germany, pp. 47-51, 166 pp.

Voß, M., Baker, A., Bange, H. W. , Conley, D., Deutsch, B., Engel, A. , Heiskanen, A. S., Jickells, T., Lancelot, C., McQuatters-Gollop, A., Middelburg, J., Schiedek, D. and Slomp, C. (2011) Nitrogen processes in coastal and marine ecosystems. In: The European Nitrogen Assessment: Sources, Effects and Policy Perspectives. , ed. by Sutton, M.. Cambridge University Press, New York, USA, pp. 147-176. ISBN 978-1-107-00612-6

Engel, A. , Barcelos e Ramos, J., Geider, R., Hutchins, D. A., Lee, C., Rost, B., Röttgers, R. and Thingstad, F. (2010) Production and export of organic matter. In: Guide to Best Practices for Ocean Acidification Research and Data Reporting. ; Chapter 3 , ed. by Riebesell, U., Fabry, V. J., Hansson, L. and Gattuso, J. P.. Publications Office of the European Union, Luxembourg, pp. 181-200.

Engel, A. (2010) Determination of Marine Gel Particles. In: Practical Guidelines for the Analysis of Seawater. . CRC-Press, Boca Raton, USA, pp. 125-142. ISBN 978-1-4200-7306-5 DOI 10.1201/9781420073072.ch7.

LaRoche, J., Rost, B. and Engel, A. (2010) Bioassays, batch culture and chemostat experimentation, Approaches and tools to manipulate the carbonate chemistry. In: Guide to Best Practices for Ocean Acidification Research and Data Reporting. , ed. by Riebesell, U., Fabry, V. J., Hansson, L. and Gattuso, J. P.. Publications Office of the European Union, Luxembourg, pp. 81-94.

Endres, S. , Hepach, H. , Marandino, C., Quack, B. and Engel, A. (2015) Mikrobielle Kontrolle organischer Bromverbindungen im oberen Ozean. [Paper] In: Statusseminar Meeresforschung mit FS SONNE 2015. , 12.-13.02.2015, Bremen . Tagungsband Statusseminar Meeresforschung mit FS SONNE 2015. ; p. 245 .

Schartau, M. , Engel, A. and Colijn, F. (2010) Transformation of dissolved organic matter and its diverse effect on higher trophic level. [Paper] In: ICES Annual Science Conference. , 22.-26.09.2008, Halifax, Canada . ICES Council Meeting Papers, 2008 (A:03).

Engel, A. (2023) Exopolymeric Substances and Their Potential Role in Marine Biogeochemical Cycling and Feedback Processes. [Talk] In: RTG2530 Seminar. , 24.01.2023, Hamburg, Germany .

Engel, A. (2023) Extracellular polymeric substances and their potential role in air-sea exchange processes. [Invited talk] In: Leipziger Meteorologisches Kolloquium, TROPOS. , 31.01.2023, Leipzig, Germany .

Engel, A. (2023) Lost at Sea: Tracing the Fate of Ocean Plastics. [Talk] In: Changing Waters Event. , 22.11.2023, Consulate General of India, Kohlhöfen 21, Hamburg .

Engel, A. (2023) New insights into measurements of the distribution of gel-like particles and their carbon content in the surface ocean. [Talk] In: Workshop on Pelagic Particle Dynamics. , 04.-06.10.2023, Brüssel .

Engel, A. (2022) Exopolymeric Substances and Their Potential Role in Marine Biogeochemical Cycling and Feedback Processes. [Invited talk] In: Gordon Research Conference "Organic Geochemistry". , 31.07.-05.08.2022, Holderness, USA .

Engel, A. (2019) Colloidal OM and marine gels from the microlayer to the deep sea. [Invited talk] In: HWK Workshop-Marine Organic Biogeochemistry. , 27.-30.04.2019, Delmenhorst, Germany .

Engel, A. (2019) Marvelous Marine Microgels. [Talk] In: ASU School of Life Sciences Seminar, Arizona State University. , 11.10.2019, Tempe, USA .

Loginova, A. N. , Dale, A. W. , Le Moigne, F. A. C. , Thomsen, S. , Sommer, S., Wallmann, K. J. G. and Engel, A. (2019) Sediment release of dissolved organic matter in the oxygen minimum zone off Peru. [Talk] In: EGU General Assembly 2019. , 08.-13.04.2019, Vienna, Austria . Geophysical Research Abstracts, 21 (EGU2019-18835-1, 2019).

Engel, A. (2017) The organic matter composition of the sea surface microlayer in response to increasing wind speed and potential implications for air-sea exchange processes. [Invited talk] In: New Frontiers in Ocean-Atmosphere Exchange. , 14.-19.05.2017, Cargese, France .

Engel, A. (2017) Supply of organic matter to oxygen minimum zones in eastern boundary upwelling systems. [Invited talk] In: 3. Xiamen Symposium on Marine Environmental Sciences. , 09.-11-01.2017, Xiamen, China .

Bergen, B., Endres, S. , Engel, A. , Sommer, U. and Jürgens, K. (2015) Effect of acidification and warming on planktonic bacterial communities during two seasonal phytoplankton bloom mesocosms. [Talk] In: ASLO Aquatic Sciences Meeting 2015. , 22.-27.02.2015, Granada, Spain .

Cisternas-Novoa, C., Lee, C. and Engel, A. (2015) Transparent exopolymer particles (TEP) and coomassie stainable particles (CSP): comparing their origin and behavior using flowcam visualization and imaging. [Talk] In: ASLO Aquatic Sciences Meeting 2015. , 22.-27.02.2015, Granada, Spain .

Endres, S. , Unger, J., Wannicke, N., Nausch, M., Voss, M. and Engel, A. (2015) Response of the filamentous cyanobacterium Nodularia spumigena to pCO2 - Exudation and extracellular enzymes. [Talk] In: International Workshop „Marine research and management“. , 12.06.2015, University of Riga, Latvia .

Engel, A. (2015) Impacts of anthropogenic perturbations on organic matter cycling in the surface ocean. [Invited talk] In: Marine research and management. , 06.06.2015, University of Latvia, Riga, Lativa .

Engel, A. , Sun, C. and Sperling, M. (2015) Influence of wind speed on the accumulation of organic matter in the surface microlayer during the Aeolotron experiment (2014). [Invited talk] In: The Ocean Surface Microlayer and Biogeochemical Feedbacks in the Earth System workshop, Ocean Interfaces semester topic Future Ocean. , 01.-03.07.2015, Kiel, Germany .

Hepach, H. , Quack, B., Fuhlbruegge, S., Raimund, S., Atlas, E. L., Engel, A. , Bracher, A., Flöter, S. and Krüger, K. (2015) Halocarbons from the Peruvian upwelling system. [Talk] In: SOPRAN Annual Meeting 2015. , 17.-18.03.2015, Mainz, Germany .

Endres, S. , Galgani, L., Riebesell, U. , Schulz, K. G. and Engel, A. (2014) Do bacteria thrive when the ocean acidifies? Results from an off-­shore mesocosm study. [Talk] In: IMBER Open Science Conference FUTURE OCEAN. , 23.-27.06.2014, Bergen, Norway .

Endres, S. , Galgani, L., Riebesell, U. , Schulz, K. G. and Engel, A. (2014) Stimulated Bacterial Growth under Elevated pCO2: Results from an Off-Shore Mesocosm Study. [Talk] In: BIOACID Annual Meeting 2014. , 10-11.09.2014, Kiel, Germany .

Engel, A. (2014) Dynamics of extracellular organic matter in a changing ocean. [Invited talk] In: SOLAS Symposium Day on Biological, Chemical and Physical processes at the ocean-atmosphere interface. , 19.06.2014, Weizmann Institute of Science, Rehovot, Israel .

Engel, A. (2014) The marine surface microlayer: A unique link between the ocean and the atmosphere. [Invited talk] In: International SCOR Sea Surface Microlayer (SML) Working Group Workshop. , 12.-18.10.2014, Qingdao, China .

Engel, A. (2014) Pelagic ecosystems in a high CO2 world: Can we predict what the future may bring?. [Invited talk] In: Swedish Marine Sciences Conference. , 10.-12.11.2014, Umea, Sweden .

Engel, A. (2014) Rückkopplungsprozesse zwischen Ozean und Atmosphäre in Zeiten des Klimawandels. [Invited talk] In: Naturwissenschaftlicher Verein Schleswig-Holsteins. , 19.02.2014, Kiel, Germany .

Galgani, L., Piontek, J. and Engel, A. (2014) The Gel-like nature of the sea-surface microlayer during the 2012 arctic sea-ice minimum. [Talk] In: Ocean Sciences Meeting 2014. , 23.-28.02.2014, Honululu, Hawaii, USA .

Engel, A. (2013) Dynamics of extracellular organic matter in a changing ocean. [Invited talk] In: ZMT-Kolloquium. , 06.03.2013, Bremen, Germany .

Engel, A. , Borchard, C., Piontek, J., Sperling, M., Riebesell, U. , Schulz, K. G. and Bellerby, R. (2013) Responses of marine microorganisms to ocean acidification during a mesocosm study in the Arctic (Svalbard). [Talk] In: EGU General Assembly 2013. , 07.-12.04.2013, Vienna, Austria .

Metfies, K., Noethig, E. M., Bracher, A., Engel, A. , Niehoff, B., Peeken, I., Bauerfeind, E., Cherkasheva, A., Gaebler-Schwarz, S., Hardge, K., Kilias, E., Kraft, A., Lalande, C., Piontek, J. , Thomisch, K. and Wurst, M. (2013) Phytoplankton Ecology and Biogeochemistry in a Changing Arctic Ocean - Molecular Genetics meets Biological Oceanography. [Talk] In: When Genetics Meets Oceanography, Observatoire Oceanologique Université Pierre et Marie Curie & Centre national de la recherche Scientifique. , 14.-16.10.2013, Banyuls sur Mer, France .

Engel, A. (2012) Biological processes responsible for gel precursor production. [Invited talk] In: SOLAS-IGAC Workshop: Marine gels and their impact on atmospheric aerosol and cloud. , 12.-14.10.2012, Kiel, Germany .

Engel, A. , Szlosek-Chow, J., Biermann, A. and Lee, C. (2012) The role of calcification and transparent exopolymer particles on aggregate formation of Emiliania huxleyi. [Invited talk] In: 2. International Workshop on Marine Aggregates from Molecular Principles to Biogeochemical Impacts. , 15.-17.08.2012, Bremen, Germany .

Endres, S. , Unger, J., Wannicke, N. and Engel, A. (2011) Effect of ocean acidification on microbial degradation of organic matter derived from a Thalassiosira weissflogii chemostat culture. [Talk] In: 4. International conference Enzymes in the Environment: Activity, Ecology and Application. , 17.-21.07.2011, Bad Nauheim, Germany .

Endres, S. , Unger, J., Wannicke, N., Nausch, M., Voss, M. and Engel, A. (2011) Effect of ocean acidification on microbial degradation of organic matter derived from a Thalassiosira weissflogii chemostat culture . [Talk] In: YOUMARES 2.0 - Ocean amidst science, innovation and society. , 07.-09.09.2011, Bremerhaven, Germany .

Endres, S. , Unger, J., Wannicke, N., Nausch, M., Voss, M. and Engel, A. (2011) Microbial degradation of organic matter produced by Thalassiosira weissflogii during a combined chemostat and batch experiment under different pCO2 levels. [Talk] In: SAME12 - 12. Symposium on Aquatic Microbial Ecology. , 28.08.-02.09.2011, Rostock/Warnemünde, Germany .

Endres, S., Unger, J., Wannicke, N., Nausch, M., Voss, M. and Engel, A. (2011) Impact of ocean acidification on microbial degradation of organic matter. [Talk] In: BIOACID Annual Meeting 2011. , 26.-30.09.2011, Bremen, Germany .

Engel, A. (2011) Crossing borders: Dynamics of extracellular organic matter in marine systems. [Invited talk] In: COST Action 735 Meeting: Sub-WG 2&3 meeting 'What is the sea surface microlayer? Towards a unified physical, chemical and biological definition of the air-ocean interface'. , 25.-26.01.2011, Plymouth, UK .

Engel, A. , Borchard, C., Bellerby, R., Klavsen, S., Piontek, J., Riebesell, U. and Schulz, K. (2011) Sensitivity of DOC production to pCO2 in arctic pelagic communities: Insights from the 2010 Svalbard mesocosm study. [Invited talk] In: EPOCA Third Annual Meeting, Royal Academy of Belgium for Science and the Arts. , 09.-13.05.2011, Brussels, Belgium .

Galgani, L., Endres, S. and Engel, A. (2011) The C-cycle on ocean’s surface. Insights to the composition of the sea surface microlayer. [Talk] In: SOPRAN Annual Meeting 2011. , 22.-23.03.2011, Heidelberg, Germany .

Kanzow, T. and Engel, A. (2011) Near-coastal supply of oxygen and dissolved organic matter to the oxygen minimum zone. [Talk] In: SFB754 Retreat Climate-biogeochemistry interactions in the tropical ocean. , 22.02.2011, Lübeck, Germany .

Schulz, K., Bellerby, R., Engel, A. , Gattuso, J. P., Hessen, D., Klavsen, S., Krug, S., Nondal, G., Silyakova, A., Sswat, M. and Riebesell, U. (2011) Organic matter dynamics and CO2 responses of the 2010 Svalbard mesocosm experiment. [Talk] In: EGU General Assembly 2011. , 03.-08.04.2011, Vienna, Austria .

Unger, J., Wannicke, N., Voss, M., Endres, S. , Engel, A. , Nausch, G. and Nausch, M. (2011) Impact of pCO2 on P-pool changes under varying phytoplankton/bacteria ratios. [Talk] In: BIOACID Annual Meeting 2011. , 26.-30.09.2011, Bremen, Germany .

Wannicke, N., Endres, S. , Unger, J., Engel, A. , Grossart, H. P., Nausch, M. and Voss, M. (2011) Growth and production of Nodularia spumigena under elevated CO2 concentrations. [Talk] In: Limnology & Oceanography in a Changing World: 2011 ASLO Aquatic Sciences Meeting. , 13.-18.02.2011, San Juan, Puerto Rico .

Wannicke, N., Unger, J., Endres, S. , Nausch, M., Salka, I., Engel, A. , Grossart, H. P. and Voss, M. (2011) Oceans turning sour - will it directly affect growth and production of heterotrophic bacteria? - What we have learned so far from laboratory to mesocosm experiments. [Talk] In: 2. Annual Meeting of BIOACID. , 26.-30.09.2011, Bremen, Germany .

Wurst, M., Kilias, E., Giebel, H., Nöthig, E., Metfies, K. and Engel, A. (2011) Microbial activities, dynamics and diversity in a changing Arctic Ocean (Fram Strait). [Talk] In: SAME12 - 12. Symposium on Aquatic Microbial Ecology. , 28.08.-02.09.2011, Rostock/Warnemünde, Germany .

Biermann, A., Engel, A. , Sommer, U. and Riebesell, U. (2010) Effect of a ‚sunny week‘ on biomass composition in a marine plankton community (Why copepods may not like sunny weeks in winter). [Talk] In: Life in warming waters: Aquashift Conference. , 07.09.2010, Kiel, Germany .

Engel, A. (2010) How will biogeochemical processes in the ocean respond to sea surface warming?. [Invited talk] In: Darwin Days. , 21.-22.04.2010, Darwin Center for Biogeosciences, NH Koningshof, Veldhoven, Netherlands .

Engel, A. (2010) Microbial Control of Dissolved Organic Matter in Changing Seas. [Invited talk] In: IFM-GEOMAR Colloquium. , 06.05.2010, Kiel, Germany .

Engel, A. (2010) Why marine organics matter when climate changes. [Invited talk] In: Colloquium University Hamburg. , 2010, Hamburg, Germany .

Harlay, J., Borges, A. V., Delille, B., Suykens, K., de Bodt, C., Sabbe, K., van Oostende, N., Engel, A. , Piontek, J. and Chou, L. (2010) Towards a comprehensive C-budgeting approach of a coccolithophorid bloom in the northern Bay of Biscay: results from PEACE project. [Talk] In: XII International Symposium on Oceanography of the Bay of Biscay. , 03.-06.05.2010, Brest, France .