GEOMAR  Somes, Christopher

Dr. Christopher Somes

 

Scientist at Research Unit Biogeochemical Modelling

photo

Office:
Room: 4.311
Tel.: +49 431 600-2053
E-Mail: csomes(at)geomar.de

Address:
GEOMAR Helmholtz Centre for Ocean Research Kiel
Wischhofstr. 1-3
24148 Kiel, Germany

Websites:
BlueSky (@SomesOcean.bsky.social)
ResearchGate
ORCID

CV download

Research Bio

I am a scientist interested in understanding how ocean biology and chemistry are affected by environmental change such as pollution and climate. I use global Earth system climate models to predict their response and associated feedbacks on the Earth’s climate system. My research focuses on analyzing and interpreting elemental isotopic ratios to gain insights and constraints on marine biogeochemical cycling and ecosystem dynamics in the modern ocean, as well as during past climate change events recorded in ocean sediments. This helps us to better understand the impacts of climate change on marine biology and chemistry, and thus improve our predictions of the future ocean and climate.

Research Interests

  • Climate change feedbacks associated with marine biogeochemistry in the past, present, and future ocean
  • Impact of anthropogenic nutrient pollutants on ocean deoxygenation and marine ecosystems
  • Nutrient co-limitation of marine phytoplankton growth
  • Isotopic constraints and insights on ocean biogeochemical cycling and marine ecosystem dynamics
  • Development of ocean biogeochemical, ecosystem, and Earth system models

Current Projects

ISOIRON (DFG page)

Isotopic constraints on global marine iron cycling, ocean productivity and deoxygenation

  • German Research Foundation (Deutsche Forschungsgemeinschaft)
  • Position: Principal Investigator
  • 2023-2026

ISODEG (DFG page)

Isotopic constraints on declining marine nutrient inventories weakening the soft-tissue biological carbon pump during the last deglaciation

  • German Research Foundation (Deutsche Forschungsgemeinschaft)
  • Position: Principal Investigator
  • 2021-2025

RETAKE II (project page)

CO2 removal by alkalinity enhancement: potential, benefits, and risks

  • Federal Ministry of Education and Research (BMBF)
  • Position: Associate Member
  • 2024-2027

Submitted Preprints / In Press Articles

  • De Sisto M., Somes, C.J., Landolfi A., MacDougall A.H., (in press), Projecting atmospheric N2O rise until the end of the 21st century: An Earth system model study, Environmental Research Letters, https://doi.org/10.1088/1748-9326/ad8c6c

  • Li N., Somes C.J., Landolfi A., Chien C.-T., Pahlow M., Oschlies A. (2024), Global impact of benthic denitrification on marine N2 fixation and primary production simulated by a variable stoichiometry Earth system model, Biogeosciences, 21, 4361-4380 https://doi.org/10.5194/bg-21-4361-2024

  • Wood R.A., Baker J.A., Beaugrand G., Boutin J., Conversi A., Donner R.V., Frenger I., Goberville E., Hayashida H., Koeve W., Kvale K., Landolfi A., Maslowski W., Oschlies A., Ramonaou A., Somes C.J., Stocker T.F., Swingedeouw D (in press), Opportunities for Earth observation to inform risk management for ocean tipping points, Surveys in Geophysics, https://doi.org/10.1007/s10712-024-09859-3

  • Hoogakker B. et al. (accepted), Review and syntheses: Review of proxies for low-oxygen paleoceanographic reconstructions, EGUsphere, https://doi.org/10.5194/egusphere-2023-2981

  • Heinze C. et al. (submitted preprint), Review and syntheses: Abrupt ocean biogeochemical change under human-made climatic forcing - warming, acidification, and deoxygenation, Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-182

Jump to: Articles in a Scientific Journal - peer-reviewed | Articles in a Scientific Journal - without review | Presentations | Conference posters | Theses - not published by a publisher | Committee
Number of items: 56.

Articles in a Scientific Journal - peer-reviewed

[thumbnail of s10712-024-09859-3.pdf]

Wood, R. A., Baker, J. A., Beaugrand, G., Boutin, J., Conversi, A., Donner, R. V., Frenger, I. , Goberville, E., Hayashida, H., Koeve, W. , Kvale, K., Landolfi, A., Maslowski, W., Oschlies, A. , Romanou, A., Somes, C. J. , Stocker, T. F. and Swingedouw, D. (2025) Opportunities for Earth Observation to Inform Risk Management for Ocean Tipping Points. Open Access Surveys in Geophysics, 46 . pp. 443-502. DOI 10.1007/s10712-024-09859-3.

[thumbnail of bg-22-863-2025.pdf] [thumbnail of bg-22-863-2025-supplement.pdf]

Hoogakker, B. A. A., Davis, C., Wang, Y., Kusch, S., Nilsson-Kerr, K., Hardisty, D. S., Jacobel, A., Reyes Macaya, D., Glock, N., Ni, S., Sepúlveda, J., Ren, A., Auderset, A., Hess, A. V., Meissner, K. J., Cardich, J., Anderson, R., Barras, C., Basak, C., Bradbury, H. J., Brinkmann, I., Castillo, A., Cook, M., Costa, K., Choquel, C., Diz, P., Donnenfield, J., Elling, F. J., Erdem, Z., Filipsson, H. L., Garrido, S., Gottschalk, J., Govindankutty Menon, A., Groeneveld, J., Hallmann, C., Hendy, I., Hennekam, R., Lu, W., Lynch-Stieglitz, J., Matos, L., Martínez-García, A., Molina, G., Muñoz, P., Moretti, S., Morford, J., Nuber, S., Radionovskaya, S., Raven, M. R., Somes, C. J. , Studer, A. S., Tachikawa, K., Tapia, R., Tetard, M., Vollmer, T., Wang, X., Wu, S., Zhang, Y., Zheng, X. Y. and Zhou, Y. (2025) Reviews and syntheses: Review of proxies for low-oxygen paleoceanographic reconstructions. Open Access Biogeosciences (BG), 22 (4). pp. 863-957. DOI 10.5194/bg-22-863-2025.

[thumbnail of De_Sisto_2024_Environ._Res._Lett._19_124036.pdf]

De Sisto, M., Somes, C. J. , Landolfi, A. and MacDougall, A. H. (2024) Projecting atmospheric N 2 O rise until the end of the 21st century: an Earth System Model study. Open Access Environmental Research Letters, 19 (12). Art.Nr. 124036. DOI 10.1088/1748-9326/ad8c6c.

[thumbnail of bg-21-4361-2024.pdf]

Li, N., Somes, C. J. , Landolfi, A. , Chien, C. T. , Pahlow, M. and Oschlies, A. (2024) Global impact of benthic denitrification on marine N2 fixation and primary production simulated by a variable-stoichiometry Earth system model. Open Access Biogeosciences (BG), 21 (19). pp. 4361-4380. DOI 10.5194/bg-21-4361-2024.

[thumbnail of s12862-024-02274-7.pdf] [thumbnail of 12862_2024_2274_MOESM1_ESM.docx]

Golikov, A. V. , Xavier, J. C., Ceia, F. R., Queirós, J. P., Bustamante, P., Couperus, B., Guillou, G., Larionova, A. M., Sabirov, R. M., Somes, C. J. and Hoving, H. J. T. (2024) Insights on long-term ecosystem changes from stable isotopes in historical squid beaks. Open Access BMC Ecology and Evolution, 24 (1). Art.Nr. 90. DOI 10.1186/s12862-024-02274-7.

[thumbnail of Global Change Biology - 2024 - Frenger - Misconceptions of the marine biological carbon pump in a changing climate .pdf]

Frenger, I. , Landolfi, A. , Kvale, K. F. , Somes, C. J. , Oschlies, A. , Yao, W. and Koeve, W. (2024) Misconceptions of the marine biological carbon pump in a changing climate: Thinking outside the “export” box. Open Access Global Change Biology, 30 (1). Art.Nr. e17124. DOI 10.1111/gcb.17124.

[thumbnail of gmd-16-6609-2023.pdf]

Pelz, M. T., Schartau, M. , Somes, C. J. , Lampe, V. and Slawig, T. (2023) A diffusion-based kernel density estimator (diffKDE, version 1) with optimal bandwidth approximation for the analysis of data in geoscience and ecological research. Open Access Geoscientific Model Development, 16 (22). pp. 6609-6634. DOI 10.5194/gmd-16-6609-2023.

[thumbnail of derville-et-al-2023-long-term-stability-in-the-circumpolar-foraging-range-of-a-southern-ocean-predator-between-the-eras.pdf]

Derville, S., Torres, L. G., Newsome, S. D., Somes, C. J. , Valenzuela, L. O., Vander Zanden, H. B., Baker, C. S., Bérubé, M., Busquets-Vass, G., Carlyon, K., Childerhouse, S. J., Constantine, R., Dunshea, G., Flores, P. A. C., Goldsworthy, S. D., Graham, B., Groch, K., Gröcke, D. R., Harcourt, R., Hindell, M. A., Hulva, P., Jackson, J. A., Kennedy, A. S., Lundquist, D., Mackay, A. I., Neveceralova, P., Oliveira, L., Ott, P. H., Palsbøll, P. J., Patenaude, N. J., Rowntree, V., Sironi, M., Vermeuelen, E., Watson, M., Zerbini, A. N. and Carroll, E. L. (2023) Long-term stability in the circumpolar foraging range of a Southern Ocean predator between the eras of whaling and rapid climate change. PNAS Proceedings of the National Academy of Sciences of the United States of America, 120 (10). Art.Nr. e2214035120. DOI 10.1073/pnas.2214035120.

[thumbnail of Wallmann2022_Article_BiogeochemicalFeedbacksMayAmpl.pdf] [thumbnail of 10533_2022_908_MOESM1_ESM.docx]

Wallmann, K. , Jose, Y. S. , Hopwood, M. J. , Somes, C. J. , Dale, A. W. , Scholz, F., Achterberg, E. P. and Oschlies, A. (2022) Biogeochemical feedbacks may amplify ongoing and future ocean deoxygenation: a case study from the Peruvian oxygen minimum zone. Open Access Biogeochemistry, 159 . pp. 45-67. DOI 10.1007/s10533-022-00908-w.

[thumbnail of fmars-08-678404.pdf]

Verwega, M. T. , Trahms, C., Antia, A. N., Dickhaus, T., Prigge, E. , Prinzler, M. H. U., Renz, M., Schartau, M. , Slawig, T., Somes, C. J. and Biastoch, A. (2021) Perspectives on Marine Data Science as a Blueprint for Emerging Data Science Disciplines. Open Access Frontiers in Marine Science, 8 . Art.Nr. 678404. DOI 10.3389/fmars.2021.678404.

[thumbnail of gmd-14-7255-2021.pdf]

Kvale, K. F. , Keller, D. P. , Koeve, W. , Meissner, K. J., Somes, C. J. , Yao, W. and Oschlies, A. (2021) Explicit silicate cycling in the Kiel Marine Biogeochemistry Model version 3 (KMBM3) embedded in the UVic ESCM version 2.9. Open Access Geoscientific Model Development, 14 (12). pp. 7255-7285. DOI 10.5194/gmd-14-7255-2021.

[thumbnail of essd-13-4861-2021.pdf]

Verwega, M. T. , Somes, C. J. , Schartau, M. , Tuerena, R. E., Lorrain, A., Oschlies, A. and Slawig, T. (2021) Description of a global marine particulate organic carbon-13 isotope data set. Open Access Earth System Science Data, 13 . pp. 4861-4880. DOI 10.5194/essd-13-4861-2021.

[thumbnail of 2020GB006901.pdf]

St John Glew, K., Espinasse, B. , Hunt, B. P. V. , Pakhomov, E. A., Bury, S. J., Pinkerton, M., Nodder, S. D., Gutiérrez‐Rodríguez, A. , Safi, K., Brown, J. C. S., Graham, L. , Dunbar, R. B. , Mucciarone, D. A., Magozzi, S., Somes, C. J. and Trueman, C. N. (2021) Isoscape Models of the Southern Ocean: Predicting Spatial and Temporal Variability in Carbon and Nitrogen Isotope Compositions of Particulate Organic Matter. Open Access Global Biogeochemical Cycles, 35 (9). Art.Nr. e2020GB006901. DOI 10.1029/2020GB006901.

[thumbnail of fmicb-12-690200.pdf] [thumbnail of Data_Sheet_1_Can Top-Down Controls Expand the Ecological Niche of Marine N2 Fixers .pdf]

Landolfi, A. , Prowe, A. E. F. , Pahlow, M., Somes, C. J. , Chien, C. T. , Schartau, M. , Koeve, W. and Oschlies, A. (2021) Can top-down controls expand the ecological niche of marine N2 fixers?. Open Access Frontiers in Microbiology, 12 . Art.Nr. 690200. DOI 10.3389/fmicb.2021.690200.

[thumbnail of Supporting information] [thumbnail of 2021GB006948(1).pdf]

Somes, C. J. , Dale, A. W. , Wallmann, K. , Scholz, F., Yao, W., Oschlies, A. , Muglia, J., Schmittner, A. and Achterberg, E. P. (2021) Constraining global marine iron sources and ligand-mediated scavenging fluxes with GEOTRACES dissolved iron measurements in an ocean biogeochemical model. Open Access Global Biogeochemical Cycles, 35 (8). e2021GB006948. DOI 10.1029/2021GB006948.

[thumbnail of 2020GB006775.pdf]

Farmer, J. R. , Hertzberg, J. E. , Cardinal, D. , Fietz, S., Hendry, K. , Jaccard, S. L. , Paytan, A. , Rafter, P. A. , Ren, H., Somes, C. J. and Sutton, J. N. (2021) Assessment of C, N, and Si Isotopes as Tracers of Past Ocean Nutrient and Carbon Cycling. Open Access Global Biogeochemical Cycles, 35 (7). Art.Nr. e2020GB006775. DOI 10.1029/2020GB006775.

Bodin, N. , Pethybridge, H. , Duffy, L. M. , Lorrain, A. , Allain, V., Logan, J. M. , Ménard, F., Graham, B., Choy, C. A. , Somes, C. J. , Olson, R. J. and Young, J. W. (2021) Global data set for nitrogen and carbon stable isotopes of tunas. Open Access Ecology, 102 (3). Art.Nr. e03265. DOI 10.1002/ecy.3265.

[thumbnail of Médieu_2021_Chemosphere.pdf] [thumbnail of 77845.pdf]

Médieu, A., Point, D., Receveur, A., Gauthier, O., Allain, V., Pethybridge, H., Menkes, C. E., Gillikin, D. P., Revill, A. T., Somes, C. J. , Collin, J. and Lorrain, A. (2021) Stable mercury concentrations of tropical tuna in the south western Pacific ocean: An 18-year monitoring study. Open Access Chemosphere, 263 . Art.Nr. 128024. DOI 10.1016/j.chemosphere.2020.128024.

[thumbnail of 72787.pdf]

Dhurmeea, Z. , Pethybridge, H., Langlais, C. , Somes, C. J. , Nikolic, N., Bourjea, J., Appadoo, C. and Bodin, N. (2020) Spatial variation in stable isotopes and fatty acid trophic markers in albacore tuna (Thunnus alalunga) from the western Indian Ocean. Open Access Deep Sea Research Part I: Oceanographic Research Papers, 161 . p. 103286. DOI 10.1016/j.dsr.2020.103286.

[thumbnail of 71964.pdf]

Logan, J. M., Pethybridge, H., Lorrain, A., Somes, C. J. , Allain, V., Bodin, N., Choy, C. A., Duffy, L., Goñi, N., Graham, B., Langlais, C., Ménard, F., Olson, R. and Young, J. (2020) Global patterns and inferences of tuna movements and trophodynamics from stable isotope analysis. Open Access Deep Sea Research Part II: Topical Studies in Oceanography, 175 . Art.Nr. 104775. DOI 10.1016/j.dsr2.2020.104775.

Lorrain, A. , Pethybridge, H. , Cassar, N. , Receveur, A. , Allain, V. , Bodin, N. , Bopp, L. , Choy, C. A. , Duffy, L., Fry, B., Goñi, N., Graham, B. S., Hobday, A. J. , Logan, J. M. , Ménard, F. , Menkes, C. E. , Olson, R. J., Pagendam, D. E. , Point, D. , Revill, A. T. , Somes, C. J. and Young, J. W. (2020) Trends in tuna carbon isotopes suggest global changes in pelagic phytoplankton communities. Open Access Global Change Biology, 26 (2). pp. 458-470. DOI 10.1111/gcb.14858.

[thumbnail of 10.1111_geb.12763.pdf]

Pethybridge, H., Choy, C. A., Logan, J. M., Allain, V., Lorrain, A., Bodin, N., Somes, C. J. , Young, J., Ménard, F., Langlais, C., Duffy, L., Hobday, A. J., Kuhnert, P., Fry, B., Menkes, C. and Olson, R. J. (2018) A global meta-analysis of marine predator nitrogen stable isotopes: Relationships between trophic structure and environmental conditions. Global Ecology and Biogeography, 27 (9). pp. 1043-1055. DOI 10.1111/geb.12763.

[thumbnail of s41467-018-03647-5.pdf] [thumbnail of 41467_2018_3647_MOESM1_ESM.pdf]

Glock, N., Erdem, Z., Wallmann, K. , Somes, C. J. , Liebetrau, V., Schönfeld, J., Gorb, S. and Eisenhauer, A. (2018) Coupling of oceanic carbon and nitrogen facilitates spatially resolved quantitative reconstruction of nitrate inventories. Open Access Nature Communications, 9 (Article number 1217). DOI 10.1038/s41467-018-03647-5.

[thumbnail of Muglia_et_al-2017-Paleoceanography.pdf]

Muglia, J. , Somes, C. J. , Nickelsen, L. and Schmittner, A. (2017) Combined Effects of Atmospheric and Seafloor Iron Fluxes to the Glacial Ocean. Open Access Paleoceanography, 32 (11). pp. 1204-1218. DOI 10.1002/2016PA003077.

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Landolfi, A. , Somes, C. J. , Koeve, W. , Zamora, L. M. and Oschlies, A. (2017) Oceanic nitrogen cycling and N2 O flux perturbations in the Anthropocene. Open Access Global Biogeochemical Cycles, 31 (8). pp. 1236-1255. DOI 10.1002/2017GB005633.

Somes, C. J. , Schmittner, A., Muglia, J. and Oschlies, A. (2017) A Three-Dimensional Model of the Marine Nitrogen Cycle during the Last Glacial Maximum Constrained by Sedimentary Isotopes. Open Access Frontiers in Marine Science, 4 . Art.Nr. 108. DOI 10.3389/fmars.2017.00108.

[thumbnail of Schmittner&Somes_2016_Paleoceanography.pdf]

Schmittner-Boesch, A. and Somes, C. J. (2016) Complementary constraints from carbon (13C) and nitrogen (15N) isotopes on the glacial ocean's soft-tissue biological pump. Open Access Paleoceanography, 31 (6). pp. 669-693. DOI 10.1002/2015PA002905.

[thumbnail of grl54338.pdf]

Somes, C. J. , Landolfi, A. , Koeve, W. and Oschlies, A. (2016) Limited impact of atmospheric nitrogen deposition on marine productivity due to biogeochemical feedbacks in a global ocean model. Open Access Geophysical Research Letters, 43 (9). pp. 4500-4509. DOI 10.1002/2016GL068335.

[thumbnail of Somes et.al.pdf]

Somes, C. J. and Oschlies, A. (2015) On the influence of “non-Redfield” dissolved organic nutrient dynamics on the spatial distribution of N2fixation and the size of the marine fixed nitrogen inventory. Open Access Global Biogeochemical Cycles, 29 (7). pp. 973-993. DOI 10.1002/2014GB005050.

[thumbnail of Young.pdf]

Young, J. W., Olson, R. J., Ménard, F., Kuhnert, P. M., Duffy, L. M., Allain, V., Logan, J. M., Lorrain, A., Somes, C. J. , Graham, B., Goñi, N., Pethybridge, H., Simier, M., Potier, M., Romanov, E., Pagendam, D., Hannides, C. and Choy, C. A. (2015) Setting the stage for a global-scale trophic analysis of marine top predators: a multi-workshop review. Reviews in Fish Biology and Fisheries, 25 (1). pp. 261-272. DOI 10.1007/s11160-014-9368-4.

[thumbnail of jgrc20761.pdf] [thumbnail of Moore et.al.pdf]

Moore, R. M., Kienast, M., Fraser, M., Cullen, J. J., Deutsch, C., Dutkiewicz, S., Follows, M. J. and Somes, C. J. (2014) Extensive hydrogen supersaturations in the western South Atlantic Ocean suggest substantial underestimation of nitrogen fixation. Open Access Journal of Geophysical Research: Oceans, 119 (7). pp. 4340-4350. DOI 10.1002/2014JC010017.

Navarro, J., Coll, M., Somes, C. J. and Olson, R. J. (2013) Trophic niche of squids: Insights from isotopic data in marine systems worldwide. Deep Sea Research Part II: Topical Studies in Oceanography, 95 . pp. 93-102. DOI 10.1016/j.dsr2.2013.01.031.

[thumbnail of bg-10-5889-2013.pdf]

Somes, C. J. , Oschlies, A. and Schmittner, A. (2013) Isotopic constraints on the pre-industrial oceanic nitrogen budget. Open Access Biogeosciences (BG), 10 (9). pp. 5889-5910. DOI 10.5194/bg-10-5889-2013.

[thumbnail of ngeo1832.pdf] [thumbnail of ngeo1832-s1.pdf]

Galbraith, E. D., Kienast, M., Galbraith, E. D., Kienast, M., Albuquerque, A. L., Altabet, M. A., Batista, F., Bianchi, D., Calvert, S. E., Contreras, S., Crosta, X., De Pol-Holz, R., Dubois, N., Etourneau, J., Francois, R., Hsu, T. C., Ivanochko, T., Jaccard, S. L., Kao, S. J., Kiefer, T., Kienast, S., Lehmann, M. F., Martinez, P., McCarthy, M., Meckler, A. N., Mix, A., Möbius, J., Pedersen, T. F., Pichevin, L., Quan, T. M., Robinson, R. S., Ryabenko, E., Schmittner-Boesch, A., Schneider, R., Schneider-Mor, A., Shigemitsu, M., Sinclair, D., Somes, C. J. , Studer, A. S., Tesdal, J. E., Thunell, R. and Terence Yang, J. Y. (2013) The acceleration of oceanic denitrification during deglacial warming. Nature Geoscience, 6 (7). pp. 579-584. DOI 10.1038/ngeo1832.

[thumbnail of 2012PA002321.pdf]

Robinson, R. S., Kienast, M., Luiza Albuquerque, A., Altabet, M., Contreras, S., De Pol Holz, R., Dubois, N., Francois, R., Galbraith, E., Hsu, T. C., Ivanochko, T., Jaccard, S., Kao, S. J., Kiefer, T., Kienast, S., Lehmann, M., Martinez, P., McCarthy, M., Möbius, J., Pedersen, T., Quan, T. M., Ryabenko, E., Schmittner, A., Schneider, R., Schneider-Mor, A., Shigemitsu, M., Sinclair, D., Somes, C. J. , Studer, A., Thunell, R. and Yang, J. Y. (2012) A review of nitrogen isotopic alteration in marine sediments. Open Access Paleoceanography, 27 (4). PA4203. DOI 10.1029/2012PA002321.

[thumbnail of 2010GL044537.pdf]

Somes, C. J. , Schmittner, A. and Altabet, M. A. (2010) Nitrogen isotope simulations show the importance of atmospheric iron deposition for nitrogen fixation across the Pacific Ocean. Open Access Geophysical Research Letters, 37 (23). L23605. DOI 10.1029/2010GL044537.

[thumbnail of 2009GB003767.pdf]

Somes, C. J. , Schmittner, A., Galbraith, E. D., Lehmann, M. F., Altabet, M. A., Montoya, J. P., Letelier, R. M., Mix, A. C., Bourbonnais, A. and Eby, M. (2010) Simulating the global distribution of nitrogen isotopes in the ocean. Open Access Global Biogeochemical Cycles, 24 (4). DOI 10.1029/2009gb003767.

Articles in a Scientific Journal - without review

[thumbnail of egusphere-2025-4907.pdf] [thumbnail of egusphere-2025-4907-supplement.pdf]

Chien, C. T. , Pahlow, M. , Somes, C. J. , Schartau, M. and Oschlies, A. (Submitted) Ensemble simulation of the Last Glacial Maximum marine biogeochemistry and atmospheric pCO 2 drawdown due to the soft-tissue biological carbon pump. EGUsphere . DOI 10.5194/egusphere-2025-4907.

[thumbnail of egusphere-2025-1846.pdf]

Siedlecki, S., Nmor, S., Lessin, G., Kearney, K., Rakshit, S., Petrik, C., Luo, J., Schultz, C., Sasaki, D., Gillen, K., Pham, A., Somes, C. J. , Brady, D., Testa, J., Rabouille, C., Elegbede, I. and Sulpis, O. (Submitted) Sediment Biogeochemistry Model Intercomparison Project (SedBGC_MIP): motivation and guidance for its experimental design. Open Access EGUsphere . DOI 10.5194/egusphere-2025-1846.

Presentations


Oschlies, A. , Koeve, W. , Landolfi, A. , Getzlaff, J., Somes, C. J. and Kriest, I. (2016) Patterns of deoxygenation – natural and anthropogenic drivers. [Talk] In: Ocean Sciences Meeting 2016. , 21.-26.02.2016, New Orleans, USA .


Somes, C. J. , Landolfi, A. , Koeve, W. and Oschlies, A. (2016) Ocean biogeochemical feedbacks limit the impact of atmospheric nitrogen depositions on marine productivity. [Talk] In: Ocean Sciences Meeting 2016. , 21.-26.02.2016, New Orleans, USA .


Oschlies, A. , Landolfi, A. , Kriest, I. , Somes, C. J. , Dietze, H. and Koeve, W. (2015) A modeler's perspective on environmental controls of N2 fixation. [Talk] In: ASLO Aquatic Sciences Meeting 2015. , 22.-27.02.2015, Granada, Spain .


Oschlies, A. , Landolfi, A. , Rabouille, S., Koeve, W. , Pahlow, M. and Somes, C. J. (2015) Phosphorus Controls on Marine N2 Fixation. [Talk] In: Goldschmidt Conference 2015. , 16.-21.08.2015, Prague, Czech Republic. .


Somes, C. J. , Oschlies, A. and Schmittner-Boesch, A. (2012) Constraining rates of N2 fixation and denitrification in the ocean using NO3:PO4 ratios. [Talk] In: Ocean Sciences Meeting 2012. , 20.-24.02.2012, Salt Lake City, USA .


Somes, C. J. (2011) Balancing the fixed nitrogen budget in the global ocean. [Talk] In: 43th International Liège Colloquium on Ocean Dynamics Tracers of physical and biogeochemical processes, past changes and ongoing anthropogenic impacts. , 02.-06.05.2011, Liege, Belgium .


Somes, C. J. (2011) Using nitrogen isotopes and xsP to constrain the fixed-N budget in the past and present ocean. [Talk] In: NICOPP Meeting: Sedimentary d15N - data synthesis, analysis and model­ing. , 08.-10.07.2011, Halifax, Canada .


Somes, C. J. (2011) Using nitrogen isotopes and xsP to constrain the fixed-N budget in the past and present ocean. [Talk] In: Institute of Technology Zurich Seminar. , 18.07.2011, Zurich, Switzerland .


Somes, C. J. (2010) Modeling the distribution of nitrogen isotopes in the global ocean. [Talk] In: FB2 Seminar, Leibniz-Institute of Marine Sciences (IFM-GEOMAR). , 29.11.2010, Kiel, Germany .

Conference posters


Landolfi, A. , Somes, C. J. , Zamora, L., Koeve, W. and Oschlies, A. (2015) Marine N inventory sensitivity to atmospheric N deposition. [Poster] In: EGU General Assembly 2015. , 12.–17.04.2015 , Vienna, Austria . Geophysical Research Abstracts, 17 (EGU2015-12648).


Somes, C. J. , Schmittner-Boesch, A. and Oschlies, A. (2013) Isotopic constrains on the fixed nitrogen budget in the modern and glacial ocean. [Poster] In: International Conference of Paleoceanography. , 01.-06.09.2013, Sitges, Spain .


Somes, C. J. , Oschlies, A. and Schmittner-Boesch, A. (2012) Isotopic constraints on the pre-industrial fixed nitrogen budget. [Poster] In: AGU Fall Meeting 2012. , 03.-07.12.2012, San Francisco, USA .


Somes, C. J. , Schmittner-Boesch, A. and Oschlies, A. (2012) Isotopic constrains on the fixed nitrogen budget in the modern and glacial ocean. [Poster] In: International Conference on Earth System Modelling. , 17.-21.09.2012, Hamburg, Germany .


Somes, C. J. (2011) Changes in the nitrogen cycle in the modern and glacial ocean. [Poster] In: XVIII INQUA-Congress Quaternary sciences – the view from the mountains : XVIII International Union for Quaternary Research (INQUA)-Congress. , 21.-27.07.2011, Bern, Switzerland .

Theses - not published by a publisher

[thumbnail of somes_dissertation.pdf]

Somes, C. J. (2013) Nitrogen Isotopes in the Global Ocean. (PhD/ Doctoral thesis), Christian-Albrechts-Universität Kiel, Kiel, Germany, 141 pp.

[thumbnail of somes_thesis.pdf]

Somes, C. J. (2009) Nitrogen isotopes in a global ocean biogeochemical model : constraints on the coupling between denitrification and nitrogen fixation. Open Access (Master thesis), Oregon State University, Corvallis, Oregon, USA, 72 pp.

Committee


Somes, C. J. (2024) Past Ocean Oxygenation / Co-lead. 02.2024- [Committee]

This list was generated on Fri Dec 5 04:03:32 2025 CET.

Theses

  • Somes, C. J. (2013). Nitrogen Isotopes in the Global Ocean. Doctoral (PhD) dissertation, Christian-Albrechts-University of Kiel, Kiel, Germany, 141 pp. (url)
  • Somes, C. J. (2009). Nitrogen isotopes in a global ocean biogeochemical model : constraints on the coupling between denitrification and nitrogen fixation. Master's thesis, Oregon State University, Corvallis, Oregon, USA, 72 pp., (url)

Education

  • Ph.D, Oceanography, GEOMAR Helmholtz Centre for Ocean Research/Kiel University, dissertation: "Nitrogen Isotopes in the Global Ocean", 2013
  • M.Sc., Oceanography, College of Oceanic and Atmospheric Sciences, Oregon State University, thesis: "Nitrogen Isotopes in a Global Ocean Biogeochemical Model", 2010
  • B.Sc., Physics (Geophysics option), Oregon State University, thesis: "Modeling instabilities of the global thermohaline circulation and its effect on the Pacific Ocean oxygen minimum zone", 2006
  • A.Eng., Software Engineering Technology, Oregon Institute of Technology, 2003