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Details of Dr. Johannes Karstensen   


Gender male
Job title Senior Scientist, GEOMAR | Helmholtz Centre for Ocean Research, Germany
Department Ocean Circulation & Climate Dynamics: Physical Oceanography
GEOMAR | Helmholtz Centre for Ocean Research Kiel (
Duesternbrooker Weg 20 Kiel 24105
GEOMAR | Helmholtz Centre for Ocean Research Kiel Duesternbrooker Weg 20
Nationality Germany
Tel +49 431 600 4156
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Website http://www.geomar.de/mitarbeiter/fb1/po/jkarstensen/
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Degree PhD
Job type Other
Research Area(s) Physical Oceanography , Physical Oceanography
Working languages German, English
Skills/Expertise My primary research is concerned with a better understanding of physical processes in the marine environment, including the interaction with biogeochemical, biological and meteorological processes - from large to local scale phenomena, from polar to tropical oceans, from open ocean to shelf seas. Scientifically and strategically, I have devoted some attention to the application of novel ocean observing techniques, the basis for innovative experimental based marine research.
PUBLICATIONS (as reported by Dr. Johannes KARSTENSEN)

1. Karstensen, J., Schütte, F., Pietri, A., Krahmann, G., Fiedler, B., Grundle, D., Hauss, H., Körtzinger, A., Löscher, C. R., Testor, P., Vieira, N., and Visbeck, M.: Upwelling and isolation in oxygen-depleted anticyclonic modewater eddies and implications for nitrate cycling, Biogeosciences Discuss., doi:10.5194/bg-2016-34, in review, 2016. 2. Schütte, F., Karstensen, J., Krahmann, G., Hauss, H., Fiedler, B., Brandt, P., Visbeck, M., and Körtzinger, A.: Characterization of ?dead-zone? eddies in the tropical Northeast Atlantic Ocean, Biogeosciences Discuss., doi:10.5194/bg-2016-33, in review, 2016. 3. Liblik, T., Karstensen, J., et al.; Potential for an underwater glider component as part of the Global Ocean Observing System, Methods in Oceanography, in revision, 2016. 4. Fiedler, B., Grundle, D., Schütte, F., Karstensen, J., Löscher, C. R., Hauss, H., Wagner, H., Loginova, A., Kiko, R., Silva, P., and Körtzinger, A.: Oxygen Utilization and Downward Carbon Flux in an Oxygen-Depleted Eddy in the Eastern Tropical North Atlantic, Biogeosciences Discuss., doi:10.5194/bg-2016-23, in review, 2016. 5. Fischer, G., Karstensen, J., Romero, O., Baumann, K.-H., Donner, B., Hefter, J., Mollenhauer, G., Iversen, M., Fiedler, B., Monteiro, I., and Körtzinger, A.: Bathypelagic particle flux signatures from a suboxic eddy in the oligotrophic tropical North Atlantic: production, sedimentation and preservation, Biogeosciences Discuss., 12, 18253-18313, doi:10.5194/bgd-12-18253-2015, 2015. 6. Cornejo, M., Bravo, L., Ramos, M., Pizarro, O., Karstensen, J., Gallegos, M., Correa-Ramirez, M., Silva, N., Farias, L., and Karp-Boss, L.: Biogeochemical characteristics of a long-lived anticyclonic eddy in the eastern South Pacific Ocean, Biogeosciences Discuss., 12, 14481-14506, doi:10.5194/bgd-12-14481-2015, 2015. 7. Schütte, F., Brandt, P., and Karstensen, J.: Occurrence and characteristics of mesoscale eddies in the tropical northeast Atlantic Ocean, Ocean Sci. Discuss., 12, 3043-3097, doi:10.5194/osd-12-3043-2015, 2015.
1. Hauss, H., Christiansen, S., Schütte, F., Kiko, R., Edvam Lima, M., Rodrigues, E., Karstensen, J., Löscher, C. R., Körtzinger, A., and Fiedler, B.: Dead zone or oasis in the open ocean? Zooplankton distribution and migration in low-oxygen modewater eddies, Biogeosciences, accepted, 2016. 2. Löscher, C. R., Fischer, M. A., Neulinger, S. C., Fiedler, B., Philippi, M., Schütte, F., Singh, A., Hauss, H., Karstensen, J., Körtzinger, A., Künzel, S., and Schmitz, R. A.: Hidden biosphere in an oxygen-deficient Atlantic open-ocean eddy: future implications of ocean deoxygenation on primary production in the eastern tropical North Atlantic, Biogeosciences, 12, 7467-7482, doi:10.5194/bg-12-7467-2015, 2015 3. Karstensen, J., Fiedler, B., Schütte, F., Brandt, P., Körtzinger, A., Fischer, G., Zantopp, R., Hahn, J., Visbeck, M., and Wallace, D.: Open ocean dead zones in the tropical North Atlantic Ocean, Biogeosciences, 12, 2597-2605, doi:10.5194/bg-12-2597-2015, 2015 4. Brandt, P., 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., On the role of circulation and mixing in the ventilation of oxygen minimum zones with a focus on the eastern tropical North Atlantic Biogeosciences 12, 489-512, doi:10.5194/bg-12-489-2015, 2015 5. Schlundt, M., P. Brandt, M. Dengler, R. Hummels, T. Fischer, K. Bumke, G. Krahmann, and J. Karstensen, Mixed layer heat and salinity budgets during the onset of the 2011 Atlantic cold tongue, J. Geophys. Res. Oceans, 119, 7882?7910, doi:10.1002/2014JC010021., 2014 6. Karstensen, J., Liblik, T., Fischer, J., Bumke, K. and Krahmann, G. Summer upwelling at the Boknis Eck time series station (1982 to 2012) - a combined glider and wind data analysi,s Biogeosciences (BG), 11 . pp. 3603-3617. DOI 10.5194/bg-11-3603-2014., 2014 7. Fischer, J., Karstensen, J., Zantopp, R. J., Visbeck, M., Biastoch, A., Behrens, E., Böning, C. W., Quadfasel, D., Jochumsen, K., Valdimarsson, H., Jónsson, S., Bacon, S., Holliday, N. P., Dye, S., Rhein, M. and Mertens, C.,Intra-seasonal variability of the DWBC in the western subpolar North Atlantic Progress in Oceanography . DOI 10.1016/j.pocean.2014.04.002, 2014 8. Llanillo, P. J., Karstensen, J., Pelegrí, J. L., and Stramma, L., Physical and biogeochemical forcing of oxygen and nitrate changes during El Niño/El Viejo and La Niña/La Vieja upper-ocean phases in the tropical eastern South Pacific along 86° W, Biogeosciences, 10, 6339-6355, doi:10.5194/bg-10-6339-2013., 2013 9. Banyte, D., Visbeck, M., Tanhua, T., Fischer, T., Krahmann, G. and Karstensen, J., Lateral diffusivity from tracer release experiments in the tropical North Atlantic thermocline Journal of Geophysical Research - Oceans, 118 (4). pp. 1-15. DOI 10.1002/jgrc.20211. , 2013 10. Send, U., Fowler, G., Siddall, G., Beanlands, B., Pittman, M., Waldmann, C., Karstensen, J. and Lampitt, R., SeaCycler: A moored open-ocean profiling system for the upper ocean in extended self-contained deployments Journal of Atmospheric and Oceanic Technology, 30 (7). pp. 1555-1565. DOI 10.1175/JTECH-D-11-00168.1., 2013 11. Fan, X., Send, U., Testor, P., Karstensen, J. and Lherminier, P., Observations of Irminger Sea Anticyclonic Eddies Journal of Physical Oceanography, 43 (4). pp. 805-823. DOI 10.1175/JPO-D-11-0155.1., 2013 12. Banyte, D., T. Tanhua, M. Visbeck, D. W.R. Wallace, J. Karstensen, G. Krahmann, A. Schneider, L. Stramma, and M. Dengler, Diapycnal diffusivity at the upper boundary of the tropical North Atlantic oxygen minimum zone, J. Geophys. Res., doi:10.1029/2011JC007762, 2012 13. Czeschel, R., Stramma, L., Schwarzkopf, F., Giese, B. S., Funk, A. , Karstensen, J., Middepth circulation of the eastern tropical South Pacific and its link to the oxygen minimum zone, Journal of Geophysical Research, 116, C01015., 2011. 14. Ruhl, H. A., Andre, M., Beranzoli, L., Cagatay, M. N., Colao, A., Cannat, M., Danobeitia, J. J., Favali, P., Geli, L., Gillooly, M., Greinert, J., Hall, P. O. J., Huber, R., Karstensen, J., Lampitt, R. S., Larkin, K. E., Lykousis, V., Mienert, J., Miranda, J. M., Person, R., Priede, I. G., Puillat, I., Thomsen, L., Waldmann, C., Societal need for improved understanding of climate change, anthropogenic impacts, and geohazard warning drive development of ocean observatories in European Seas, Progress In Oceanography, DOI 10.1016/j.pocean.2011.05.001., 2011. 15. Karstensen, J. and Lorbacher, K., A practical indicator for surface ocean heat and freshwater buoyancy fluxes and its application to the NCEP reanalysis data Tellus Se- ries A: Dynamic meteorology and oceanography, 63, pp. 338-347. DOI 10.1111/j.1600- 0870.2011.00510.x., 2011. 16. Müller, C., Y. Iinuma, J. Karstensen, D. van Pinxteren, S. Lehmann, T. Gnauk, H. Herrmann, Seasonal variation of aliphatic amines in marine sub-micrometer particles at the Cape Verde islands, Atmos. Chem. Phys., 9, 9587-9597, 2009. 17. Karstensen, J., Stramma, L., and Visbeck, M., Oxygen minimum zones in the eastern tropical Atlantic and Pacific oceans. Progress in Oceanography, 77 (4), 2008. 18. Bork, K., Karstensen, J., Visbeck, M., Zimmermann, A., The Legal Regulation of Floats and Gliders - in Quest of a New Regime? Ocean Development and International Law, 39 (3), 298-328, 2008. 19. Körtzinger, A., Send, U., Lampitt, R., Hartman, S., Wallace, D.W.R., Karstensen, J., Villagarcia, M.G., Llinas, O., DeGrandpre, M., The seasonal pCO2 cycle at 49°N/ 16.5°W in the northeast Atlantic Ocean and what it tells us about biological productivity, Journal of Geophysical Research, 113, C04020, 2008. 20. Körtzinger, A., Send, Wallace, D.W.R., Karstensen, J., DeGrandpre, M., The seasonal cycle of O2 and pCO2 in the central Labrador Sea: Atmospheric, biological and physical implications, Global Biogeochemical Cycles, 22, GB1014, 2008. 21. Avsic, T., Karstensen, J., Send, U., and Fischer, J., Interannual variability of newly formed Labrador Sea Water from 1994 to 2005, Geophysical Research Letters, 33, L21S02, doi:10.1029/ 2006GL026913, 2006. 22. Karstensen, J., Avsic, T., Fischer, J., Send, U., Subsurface temperature maxima in the Labrador Sea and the subpolar North Atlantic, Geophysical Research Letters, 33, L21S05, 10.1029/2006GL026613, 2006. 23. Karstensen, J., P. Schlosser, D. Wallace, J. Bullister, J. Blindheim, Water mass transformation in the Greenland Sea during the 1990?s, Journal of Geophysical Research, 110, C07022, doi:10.1029/2004JC002510, 2005. 24. Schneider, B., Karstensen, J., Oschlies, A. , Schlitzer, R., Model-based evaluation of methods to determine C:N and N:P regeneration ratios from dissolved nutrients, Global Biogeochemical Cycles, 19, GB2009, doi:10.1029/2004GB002256, 2005. 25. Karstensen, J., The formation of the South Pacific Shallow Salinity Minimum: A Southern Ocean pathway to the tropical Pacific, Journal of Physical Oceanography, 34 (11), 2398- 2412, 2004. 26. Karstensen, J., D. Quadfasel, Formation of Southern Hemisphere Thermocline waters: Water mass Conversion and Subduction, Journal of Physical Oceanography, 32, 3020-3038, 2002. 27. Karstensen, J., D. Quadfasel, Subduction rates and volumes for the southern Indian Ocean thermocline. Deep-Sea Research, 49 (II), 1441-1457, 2002. 28. Hupe, A., Karstensen, J., Redfield stoichiometry in Arabian Sea subsurface waters, Global Biogeochemical Cycles, 14(1), 357-372, 2000. 29. Karstensen, J., Tomczak, M., Age determination of mixed water masses using CFC and oxygen data, Journal of Geophysical Research, 103(C9), 18599-18610, 1998. 30. Karstensen, J., Tomczak, M., Ventilation processes and water mass ages in the thermocline of the southeast Indian Ocean, Geophysical Research Letters, 24, 2777-2780, 1997.

Group(s): GOOS , GOOS Physics Panel (OOPC) , JCOMM , Observations Programme Area (OPA) , Data Buoy Cooperation Panel (DBCP) , OCEAN Sustained Interdisciplinary Timeseries Environment observation System (OceanSITES) , OceanSITES Steering Team , OceanSITES Data Management Team , DBCP Action Groups , OceanSITES Executive Committee , GCOS/GOOS/WCRP Ocean Observations Panel for Climate
Created: 2004-10-01 Last Updated: 2017-03-06 by Johannes KARSTENSEN