All Publications of Johannes Hahn

Number of items: 48.

Articles in a Scientific Journal - peer-reviewed

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Foltz, G. R., Brandt, P. , Richter, I., Rodríguez-Fonseca, B., Hernandez, F., Dengler, M. , Rodrigues, R. R., Schmidt, J. O., Yu, L., Lefevre, N., Da Cunha, L. C., McPhaden, M. J., Araujo, M., Karstensen, J. , Hahn, J. , Martín-Rey, M., Patricola, C. M., Poli, P., Zuidema, P., Hummels, R., Perez, R. C., Hatje, V., Lübbecke, J. F. , Polo, I., Lumpkin, R., Bourlès, B., Asuquo, F. E., Lehodey, P., Conchon, A., Chang, P., Dandin, P., Schmid, C., Sutton, A., Giordani, H., Xue, Y., Illig, S., Losada, T., Grodsky, S. A., Gasparin, F., Lee, T., Mohino, E., Nobre, P., Wanninkhof, R., Keenlyside, N., Garcon, V., Sánchez-Gómez, E., Nnamchi, H., Drévillon, M., Storto, A., Remy, E., Lazar, A., Speich, S., Goes, M., Dorrington, T., Johns, W. E., Moum, J. N., Robinson, C., Perruche, C., de Souza, R. B., Gaye, A. T., López-Parages, J., Monerie, P. A., Castellanos, P., Benson, N. U., Hounkonnou, M. N., Duhá, J. T., Laxenaire, R. and Reul, N. (2019) The Tropical Atlantic Observing System. Open Access Frontiers in Marine Science, 6 (206). DOI 10.3389/fmars.2019.00206.

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Bourlès, B. , Araujo, M. , McPhaden, M. J. , Brandt, P. , Foltz, G. R. , Lumpkin, R. , Giordani, H. , Hernandez, F. , Lefèvre, N. , Nobre, P. , Campos, E. , Saravanan, R. , Trotte‐Duhà, J., Dengler, M. , Hahn, J. , Hummels, R., Lübbecke, J. F. , Rouault, M. , Cotrim, L. , Sutton, A. , Jochum, M. and Perez, R. C. (2019) PIRATA: A Sustained Observing System for Tropical Atlantic Climate Research and Forecasting. Open Access Earth and Space Science, 6 (4). pp. 577-616. DOI 10.1029/2018EA000428.

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Bittig, H. C., Körtzinger, A. , Neill, C., van Ooijen, E., Plant, J. N., Hahn, J. , Johnson, K. S., Yang, B. and Emerson, S. R. (2018) Oxygen Optode Sensors: Principle, Characterization, Calibration, and Application in the Ocean. Open Access Frontiers in Marine Science, 4 . Art.No. 429. DOI 10.3389/fmars.2017.00429.

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Hahn, J. , Brandt, P. , Schmidtko, S. and Krahmann, G. (2017) Decadal oxygen change in the eastern tropical North Atlantic. Open Access Ocean Science, 13 (4). pp. 551-576. DOI 10.5194/os-13-551-2017.

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Karstensen, J. , Fiedler, B., Schütte, F., Brandt, P. , Körtzinger, A. , Fischer, G., Zantopp, R. J. , Hahn, J. , Visbeck, M. and Wallace, D. W. R. (2015) Open ocean dead zones in the tropical North Atlantic Ocean. Open Access Biogeosciences (BG), 12 . pp. 2597-2605. DOI 10.5194/bg-12-2597-2015.

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Brandt, P. , Bange, H. W. , Banyte, D., Dengler, M. , Didwischus, S. H., Fischer, T. , Greatbatch, R. J. , Hahn, J. , Kanzow, T., Karstensen, J. , Körtzinger, A. , Krahmann, G. , Schmidtko, S. , Stramma, L. , Tanhua, T. and Visbeck, M. (2015) On the role of circulation and mixing in the ventilation of oxygen minimum zones with a focus on the eastern tropical North Atlantic. Open Access Biogeosciences (BG), 12 . pp. 489-512. DOI 10.5194/bg-12-489-2015.

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Hahn, J. , Brandt, P. , Greatbatch, R. J. , Krahmann, G. and Körtzinger, A. (2014) Oxygen variance and meridional oxygen supply in the Tropical North East Atlantic oxygen minimum zone. Climate Dynamics, 43 (11). pp. 2999-3024. DOI 10.1007/s00382-014-2065-0.

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Brandt, P. , Greatbatch, R. J. , Claus, M. , Didwischus, S. H., Hormann, V., Funk, A., Hahn, J. , Krahmann, G. , Fischer, J. and Körtzinger, A. (2012) Ventilation of the equatorial Atlantic by the equatorial deep jets. Open Access Journal of Geophysical Research: Oceans, 117 (C12). C12015. DOI 10.1029/2012JC008118.

Presentations


Hahn, J. , Schütte, F., Brandt, P. and Frenger, I. (2019) Oxygen depleted eddies at low latitudes in the eastern tropical North Atlantic. [Invited talk] In: ETH Zürich: UP group seminar. , 08.03.2019, Zürich, Switzerland .

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Brandt, P. , Hahn, J. and Schmidtko, S. (2018) Drivers and mechanisms of thermocline oxygen changes in the eastern tropical North Atlantic. Open Access [Invited talk] In: Ocean Deoxygenation Conference 2018. , 03.-07.09.2018, Kiel, Germany .

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Brandt, P. , Hahn, J. , Schmidtko, S. and Oschlies, A. (2018) Changes in the tropical Atlantic oxygen minimum zone in perspective of global ocean deoxygenation. Open Access [Invited talk] In: THEMES 2018 - Oceanic and atmospheric variability, from long-term trends to abrupt shifts. , 28.-30.11.2018, Venice, Italy .

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Brandt, P. , Schmidtko, S. and Hahn, J. (2018) Oxygen changes in the tropical North Atlantic in connection to meridional overturning circulation and subtropical cell variability. Open Access [Talk] In: PIRATA 23 Meeting. , 22.10.-26.10.2018, Marseille, France .


Hahn, J. (2018) Jagd auf gigantische Wasserwirbel in der Todeszone. [Public Lecture] In: Geht dem Ozean die Luft aus?. , 05.09.2018, Kiel, Germany .


Hahn, J. and Hummels, R. (2018) Aquadopp applications in physical oceanography at GEOMAR. [Talk] In: Nortek Seminar. , 18.06.2018, Rud (Oslo), Norway .

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Hahn, J. , Brandt, P. and Kemme, J. (2018) Eddy-driven oxygen supply to the eastern tropical North Atlantic oxygen minimum zone. [Talk] In: PIRATA 23 Meeting. , 22.10.-26.10.2018, Marseille, France .


Hahn, J. , Brandt, P. , Roth, C., Schwarzkopf, F. U. , Duteil, O. , Karstensen, J. , Schütte, F., Krahmann, G. and Körtzinger, A. (2018) Time scales of oxygen variability in the eastern tropical North Atlantic. [Talk] In: Ocean Deoxygenation: Drivers and Consequences - Past/Present/Future. International Conference. , 03.-07.09.2018, Kiel, Germany .

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Hahn, J. , Brandt, P. , Schmidtko, S. and Krahmann, G. (2016) Interplay of oxygen and hydrography in the eastern tropical North Atlantic on decadal to multi-decadal time scales. [Talk] In: EGU General Assembly 2016. , 17.-22.04.2016, Vienna, Austria .

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Brandt, P. , Hahn, J. , Schütte, F., Fischer, T. , Karstensen, J. , Greatbatch, R. J. , Dengler, M. , Körtzinger, A. , Krahmann, G. , Schmidtko, S. , Stramma, L. , Tanhua, T. and Visbeck, M. (2016) Oxygen variability in the eastern tropical North Atlantic oxygen minimum zone. [Talk] In: Lamont Doherty Earth Observatory at Columbia University. , 11.03.2016, Palisades, NY, USA .

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Brandt, P. , Dengler, M. , Didwischus, S. H., Fischer, T. , Greatbatch, R. J. , Hahn, J. , Karstensen, J. , Körtzinger, A. , Krahmann, G. , Schmidtko, S. , Stramma, L. , Tanhua, T. and Visbeck, M. (2015) On the role of circulation and mixing in the ventilation of the oxygen minimum zone of the eastern tropical North Atlantic. [Talk] In: RSMAS. , 09.03.2015, Miami, Fla., USA .

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Hahn, J. , Bittig, H. C., Krahmann, G. , Karstensen, J. , Brandt, P. and Körtzinger, A. (2014) In situ calibration procedure for Aanderaa optodes with a focus on glider oxygen measurements. [Talk] In: 6. EGO Meeting and Final Symposium of the COST Action ES0904. , 16.-17.06.2014, Kiel, Germany .

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Hahn, J. , Brandt, P. , Greatbatch, R. J. , Krahmann, G. and Körtzinger, A. (2014) Oxygen Variance and Meridional Oxygen Supply in the Tropical North East Atlantic Oxygen Minimum Zone. [Talk] In: Ocean Sciences Meeting 2014. , 23.-28.02.2014, Honululu, Hawaii, USA .

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Brandt, P. , Bange, H. W. , Banyte, D., Dengler, M. , Didwischus, S. H., Fischer, T. , Greatbatch, R. J. , Hahn, J. , Kanzow, T., Karstensen, J. , Körtzinger, A. , Krahmann, G. , Schmidtko, S. , Stramma, L. , Tanhua, T. and Visbeck, M. (2014) On the role of circulation and mixing in the ventilation of the oxygen minimum zone of the eastern tropical North Atlantic. [Talk] In: 1. International Conference AWA “Ecosystem approach to the management of fisheries and the marine environment in West African Waters”. , 11.12.2014, Dakar, Senegal .

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Hahn, J. , Fischer, T. , Brandt, P. , Greatbatch, R. J. , Körtzinger, A. , Tanhua, T. , Visbeck, M. , Banyte, D., Dengler, M. and Krahmann, G. (2014) Oxygen Supply to the Tropical North East Atlantic Oxygen Minimum Zone. [Talk] In: SFB754 Colloquium. , 08.01.2014, Kiel, Germany .

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Fischer, T. , Hahn, J. , Brandt, P. , Greatbatch, R. J. , Körtzinger, A. , Tanhua, T. , Visbeck, M. , Banyte, D., Dengler, M. and Krahmann, G. (2013) Oxygen Supply to the Tropical North East Atlantic Oxygen Minimum Zone. [Invited talk] In: IOW Colloquium. , 18.11.2013, Rostock, Germany .

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Hahn, J. , Brandt, P. , Greatbatch, R. J. , Krahmann, G. and Körtzinger, A. (2013) Current and Oxygen Variability in the Tropical North East Atlantic. [Talk] In: Tropical Atlantic Variability Meeting / PIRATA-18 Meeting . , 22. - 25.10.2013, Venice, Italy .

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Brandt, P. , Greatbatch, R. J. , Claus, M. , Didwischus, S. H. and Hahn, J. (2013) Ventilation of the equatorial Atlantic. [Talk] In: EGU General Assembly 2013. , 07.-12.04.2013, Vienna, Austria .

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Brandt, P. , Greatbatch, R. J. , Claus, M. , Didwischus, S. H. and Hahn, J. (2013) Ventilation of the equatorial Atlantic. [Talk] In: 3. Sino-German Symposium "Multidisciplinary Processes in Deep Oceans and Impacts on Climate and Coastal Environment". , 03.-06.09.2013, Qingdao, China .

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Brandt, P. , Greatbatch, R. J. , Claus, M. , Didwischus, S. H. and Hahn, J. (2013) Ventilation of the equatorial Atlantic. [Talk] In: CLIVAR TAV-PIRATA Meeting. , 24.10.2013, Venice, Italy .


Fiedler, B., Fietzek, P., Bittig, H. C., Hahn, J. , Steinhoff, T., Karstensen, J. and Körtzinger, A. (2013) Recent Development on Sensors and Calibrations Approaches at GEOMAR. [Invited talk] In: VITALS Workshop. , 17.-18.10.2013, Halifax, Canada .

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Hahn, J. , Brandt, P. , Greatbatch, R. J. , Krahmann, G. and Körtzinger, A. (2012) O2 variance and meridional O2 supply in the Tropical North East Atlantic. [Talk] In: Tropical Atlantic Variability Meeting, PIRATA-17 Meeting . , 10.09.-15.09.2012, Kiel .

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Brandt, P. , Greatbatch, R. J. , Didwischus, S. H., Claus, M. , Funk, A., Hormann, V., Hahn, J. , Fu, Y., Dengler, M. and Toole, J. M. (2012) Ventilation of the Tropical Atlantic by Equatorial Deep Jets. [Talk] In: Ocean Sciences Meeting 2012. , 20.-24.02.2012, Salt Lake City, USA .

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Brandt, P. , Greatbatch, R. J. , Didwischus, S. H., Claus, M. , Hahn, J. , Hormann, V., Funk, A., Fu, Y. and Dengler, M. (2012) Equatorial deep jets in the Atlantic Ocean. [Talk] In: EGU General Assembly 2012. , 22.-27.04.2012, Vienna, Austria .

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Karstensen, J. , Czeschel, R., Hahn, J. , Schlundt, M. and Krahmann, G. (2011) In-situ calibration of Oxygen Optodes in the Southeast Pacific Oxygen Minimum Zone. [Talk] In: EGO 2011 - 5th EGO Meeting and Glider School. , 14.-18.03.2011, Las Palmas, Gran Canary .


Karstensen, J. , Czeschel, R., Hahn, J. , Stramma, L. and Krahmann, G. (2011) In-situ calibration of oxygen optodes on gliders and floats: An example from the Southeast Pacific oxygen minimum zone. [Talk] In: ARGO Oxygen Meeting. , 25.-27.05.2011, Brest, France .

Conference posters


Hahn, J. , Schütte, F., Brandt, P. and Frenger, I. (2019) Oxygen depleted eddies at low latitudes in the eastern tropical North Atlantic. [Poster] In: EGU General Assembly 2019. , 08.-12.04.2019, Vienna, Austria .


Hahn, J. , Brandt, P. , Karstensen, J. and Körtzinger, A. (2018) Time scales of oxygen variability in the eastern tropical North Atlantic. [Poster] In: EGU General Assembly 2018. , 08.-13.04.2018, Vienna, Austria .

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Hahn, J. , Brandt, P. , Karstensen, J. and Körtzinger, A. (2017) Observations of oxygen variability in the eastern tropical North Atlantic. [Poster] In: PIRATA 22 - PREFACE - TAV Meeting. , 05.-10.11.2017, Fortaleza, Brasil .

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Hahn, J. , Brandt, P. and Krahmann, G. (2015) Meso- to submesoscale O2 variability in the oxygen minimum zone of the eastern tropical North Atlantic. [Poster] In: EGU General Assembly 2015. , 12.–17.04.2015 , Vienna, Austria .

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Hahn, J. , Brandt, P. , Greatbatch, R. J. , Krahmann, G. and Körtzinger, A. (2013) O2 variability and Meridional Oxygen Supply in the Tropical North East Atlantic Oxygen Minimum Zone. [Poster] In: EGU General Assembly 2013. , 07.-12.04.2013, Vienna, Austria .

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Hahn, J. , Brandt, P. , Greatbatch, R. J. , Körtzinger, A. , Krahmann, G. and Funk, A. (2012) O2 variance at intermediate depth in the central tropical Atlantic along 23°W. [Poster] In: EGU General Assembly 2012. , 22.-27.04.2012, Vienna, Austria .


Bittig, H. C., Fiedler, B., Steinhoff, T., Hahn, J. , Boebel, O. and Körtzinger, A. (2012) Oxygen sensor characterization and calibration – Providing the Argo-O2 essentials. [Poster] In: 4. Argo Science Workshop. , 27.-29.09.2012, Venice, Italy .


Karstensen, J. , Fiedler, B., Brandt, P. , Körtzinger, A. , Zantopp, R. J. , Wallace, D. W. R., Krahmann, G. , Visbeck, M. and Hahn, J. (2012) Severe dead-zone eddies in the open North Atlantic Ocean. [Poster] In: EGU General Assembly 2012. , 22.-27.04.2012, Vienna, Austria .


Hahn, J. , Brandt, P. , Körtzinger, A. , Krahmann, G. , Karstensen, J. , Schlundt, M. and Funk, A. (2011) Mesoscale and finescale oxygen variability at the southern edge of the tropical north east Atlantic Ocean oxygen minimum zone. [Poster] In: EUR-OCEANS Conference - Ocean deoxygenation and implications for marine biogeochemical cycles and ecosystems. , 24.-26.10.2011, Toulouse, France .

Theses - not published by a publisher

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Hahn, J. (2013) Oxygen Variability and Eddy-driven Meridional Oxygen Supply in the Tropical North East Atlantic Oxygen Minimum Zone. (PhD/ Doctoral thesis), Christian-Albrechts-Universität Kiel, Kiel, Germany, 129 pp.

Reports - Cruise Reports

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Brandt, P. , Alevara Martinez, D., Dengler, M. , Didwischus, S. H., Funk, A., Hahn, J. , Hogue, B., Kemena, T., Kock, A. , Krahmann, G. , Martens, W., Martogli, N., Müller, M., Niehus, G., Papenburg, U., Pinck, A., Rother, K., Schlundt, M., Schütte, F., Tippenhauer, S., Vogt, M. and Zantopp, R. J. (2012) Physical and Biogeochemical Studies in the Subtropical and Tropical Atlantic. . Maria S. Merian-Berichte . DFG Senatskommission für Ozeanographie, Hamburg, Germany, 41 pp.

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Brandt, P. , Brownell, D., Dengler, M. , Didwischus, S. H., Fehsenfeld, S., Fessler, S., Fischer, J. , Funk, A., Großkopf, T., Hahn, J. , Halm, H., Hormann, V., Koy, U., Krahmann, G. , Krupke, A., Melo, V., Müller, M., Niehus, G., Papenburg, U., Pinck, A., Schneider, A., Steinhoff, T., Stöven, T., Truscheit, T., Viera, N., von Neuhoff, H., Wagener, T., Wuttig, K. and Zantopp, R. J. (2011) Circulation and Oxygen Distribution in the Tropical Atlantic Cruise No. 80, Leg 1; October 26 to November 23, 2009 Mindelo (Cape Verde) to Mindelo (Cape Verde). Open Access . Meteor-Berichte, M80/1 . Leitstelle Deutsche Forschungsschiffe, Inst. f. Meereskunde, Hamburg, Germany, 49 pp. DOI 10.2312/cr_m80_1.

Reports - other reports

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Berx, B., Cunningham, S., von Appen, W. J., Atamanchuk, D., Brown, P., Fraser, N., Hahn, J. , Jochumsen, K., Johnson, C., de Jong, F., Karstensen, J. , King, B., Lankhorst, M., Larsen, K. M. H., McDonagh, E., Moritz, M. and Yashayaev, I. (2019) Report on the observational potential of the TMAs. Open Access . AtlantOS Deliverable, D3.18 . AtlantOS, 35 pp. DOI 10.3289/atlantos_d3.18.

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Bourles, B., Brandt, P. , Lefevre, N. and Hahn, J. (2018) PIRATA data system upgrade Report. Open Access . AtlantOS Deliverable, D3.9 . AtlantOS, 7 pp. DOI 10.3289/AtlantOS_D3.9.

This list was generated on Tue Sep 17 19:32:30 2019 CEST.