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Reiner Steinfeldt

Reiner Steinfeldt
Reiner Steinfeldt
  • Tel: +49 (0)421 218-62151
  • Email: rsteinf [at] physik.uni-bremen.de

Research Interests

  • spreading of North Atlantic Deep Water (time scales, variability)
  • determination of ages / transit time distributions from tracer data (CFCs)
  • estimation of the Atlantic Ocean inventory of anthropogenic carbon
  • calculation of vertical velocity in upwelling regions (Peru, Mauritania, equatorial Atlantic)
Curriculum Vitae  
seit 10/2001 research scientist (postdoc), Institute of Environmental Physics (IUP), University of Bremen
09/2001 Ph.D. in Physics, University of Bremen
05/1998 - 09/2001 research scientist, Institute of Environmental Physics (IUP), University of Bremen
05/1997 - 04/1998 scholarship holder, Institute of Environmental Physics (IUP), University of Bremen
01/1997 diploma in physics, University of Bremen
1990 - 1997 studies of physics, University of Hannover
Projects  
BMBF-Verbundvorhaben RACE II Regional Atlantic Circulation and Global Change,
Project Management
BMBF-Verbundvorhaben SOPRAN IIITeilprojekt 1.11 Surface Ocean Processes in the Anthropocene
Estimation of upwelling velocities from the helium isotope disequilibrium
CARBOCHANGE Changes in carbon uptake and emissions by oceans in a changing climate
DFG-AtlanticTracer Changes in the anthropogenic CO2 inventory and formation rates of deep and intermediate waters, derived from large scale transient tracer distributions in the Atlantic
BMBF-Verbundvorhaben SOPRAN IITeilprojekt 3.6 Surface Ocean Processes in the Anthropocene
Upwelling at the Mauritanian coast and at the equator
CARBOOCEAN IP estimation of the marine carbon sources and sinks in the Atlantic and Southern Ocean at a time interval of -/+200 years from now
Publications
Steinfeldt, R., M. Rhein, and D. Kieke, (2024), Anthropogenic carbon storage and its decadal changes in the Atlantic between 1990–2020, Biogeosciences, 21, 3839–3867, doi:10.5194/bg-21-3839-2024.
Chouksey, M., A. Griesel, C. Eden, and R. Steinfeldt (2022), Transit Time Distributions and ventilation pathways using CFCs and Lagrangian backtracking in the South Atlantic of an eddying ocean model. J. Phys. Oceanogr., 52(7), 1531-1548, 2022, doi:10.1175/JPO-D-21-0070.1.
Lauvset, S.K., N. Lange, T. Tanhua, H.C. Bittig, A. Olsen, A. Kozyr, S. Alin, M. Álvarez, K. Azetsu-Scott, P.J. Brown, B.R. Carter, L.C. da Cunha, M. Hoppema, M. P. Humphreys, M. Ishii, E. Jeansson, A. Murata, J.D. Müller, F.F. Pérez, C. Schirnick, R. Steinfeldt, T. Suzuki, A. Ulfsbo, A. Velo, and R.J. Woosley, (2024), The annual update GLODAPv2.2023: the global interior ocean biogeochemical data product, Earth Syst. Sci. Data, 16, 2047–2072, doi: 10.5194/essd-16-2047-2024.
Kieke, D., K. Bulsiewicz, C. Gapp, Y. Hinse, O. Huhn, B. Holanda, A. Hunkemöller, S. Kinne, M. Köllner, L. Krisztian, O. Krüger, I. Leimann, M. Pöhlker, A. Schneehorst, A. Smirnov, R. Steinfeldt, M. Stelzner, J. Stiehler, T. Svensson, S. Wett, and K. N. Wiegand (2021), AMOC Components at 47°N, Cruise No. M164 (GPF-19-1-105), June 23 - July 31, 2020, Emden (Germany) - Emden (Germany), METEOR-Berichte, Gutachterpanel Forschungsschiffe, doi:10.48433/cr_m164.
Stendardo, I., M. Rhein, and R. Steinfeldt (2020), The North Atlantic Current and its volume and freshwater transports in the subpolar North Atlantic, time period 1993-2016, J. Geophys. Res, 125,9, e2020JC016065, doi:10.1029/2020JC016065.
Olsen, A., N. Lange, R. M. Key, T. Tanhua, H. C. Bittig, A. Kozyr, M. Álvarez, K. Azetsu-Scott, S. Becker, P. J. Brown, B. R. Carter, L. C. da Cunha, R. A. Feely ,S. van Heuven, M. Hoppema, M. Ishii, E. Jeansson, S. Jutterström, C. S. Landa, S. K. Lauvset, P. Michaelis, A. Murata, F. F. Pérez, B. Pfeil, C. Schirnick, R. Steinfeldt, T. Suzuki, B. Tilbrook, A. Velo, R. Wanninkhof, and R. J. Woosley (2020), An updated version of the global interior ocean biogeochemical data product, GLODAPv2.2020. Earth Syst. Sci. Data, 12, 3653–3678, 2020, doi:10.5194/essd-12-3653-2020.
Kieke, D., K. Bulsiewicz, I. Deschepper, O. Huhn, M. Kastens, A. Kersting, M. Köllner, L. Krisztian, I. Leimann, B. Mirau, M. Moritz, N. Rohlfs, A. Schneehorst, R. Steinfeldt, I. Stendardo, J. Stiehler, and R. Tao (2020), Long-term observations of the Atlantic Meridional Overturning Circulation, Cruise No. MSM83, May 17 - June 15, 2019, Las Palmas (Spain) - St. John's (Canada). MARIA S. MERIAN-Berichte, doi:10.2312/cr_msm83.
Kieke, D, R. Arruda Monteiro da Silva, K. Bulsiewicz, K. Azetsu-Scott, N. Binnemann, A. Buinyi, C. Feucher, O. Huhn, M. Köllner, H. Nowitzki, J. Oelsmann, A. Röhler, N. Rohlfs, A. Schneehorst, R. Steinfeldt, H.-H. Uhde, K. Wiegand, and F. Wischnewski (2019), Subpolar Gyre Variability, Cruise No. MSM73, April 06 - May 22, 2018, Cadiz (Spain) - St. John's (Canada). MARIA S. MERIAN-Berichte, doi:10.2312/cr_msm73.
Kieke, D, K. Altona, A. Buinyi, C. dos Santos Ferreira, L. Frahm, Y. Garcia Quintana, J. Gerken, A. Gerriets, A. Herland, S. Kinne, M. Köllner, S. Küper, G. Martinez-Mendez, B. Mirau, H. Nowitzki, C. Pennelly, M. Retsch, A. Roessler, A. Schneehorst, R. Steinfeldt, G. Stokland, P. Sültenfuß, H.-H. Uhde, and F. Wischnewski (2019), Transport Measurements across 47°N in the North Atlantic, Cruise No. MSM64, May 27 - June 23, 2017, Southampton (Germany) - Galway (Ireland) - St. John's (Canada). MARIA S. MERIAN-Berichte, doi:10.2312/cr_msm64.
Müller, V., D. Kieke, P.G. Myers, C. Pennelly, R. Steinfeldt, and I. Stendardo (2019), Heat and freshwater transport by mesoscale eddies in the southern subpolar North Atlantic. J. Geophys. Res.: Oceans, 124, doi:10.1029/2018JC014697.
Olsen, A., N. Lange, R.M. Key, T. Tanhua, M. Álvarez, S. Becker, H.C. Bittig, B.R. Carter, L.C. da Cunha, R.A. Feely ,S. van Heuven, M. Hoppema, M. Ishii, E. Jeansson, S.D. Jones, S. Jutterström, M.K. Karlsen, A. Kozyr, S.K. Lauvset, C. Lo Monaco, A. Murata, F.F. Pérez, B. Pfeil, C. Schirnick, R. Steinfeldt, T. Suzuki, M. Telszewski, B. Tilbrook, A. Velo, and R. Wanninkhof (2019), GLODAPv2.2019 – an update of GLODAPv2. Earth Syst. Sci. Data, 11, 1437–1461, doi:10.5194/essd-11-1437-2019.
Deng, F., G.M. Henderson, M. Castrillejo, F.F. Perez, and R. Steinfeldt (2018), Evolutioin of 231Pa and 230Th in overflow waters of the North Atlantic. Biogeosciences, 15, 7299-7313, doi:10.5194/bg-15-7299-2018.
Kieke, D, W. Böke, S. Büttner, K. Bulsiewicz, C. Danek, T. Hempel, D. Khordakova, B. Mirau, A. Rochner, A. Roessler, N. Rohlfs, A. Schneehorst, R. Steinfeldt, P. Sültenfuß, H.-H. Uhde, S. Wett, K. Wiegand, F. Wischnewski (2018), Subpolar Gyre Variability, Cruise No. MSM53, March 31 - May 09, 2016, Kiel (Germany) - St. John's (Canada). MARIA S. MERIAN-Berichte, DFG-Senatskommission für Ozeanographie, doi:10.2312/cr_msm53.
Rhein, M., R. Steinfeldt, O. Huhn, J. Sültenfuß, and T. Breckenfelder (2018), Greenland subarine melt water observed in the Labrador and Irminger Sea, Geophys. Res. Lett., 45, 10.570-10.578, doi:10.1029/2018GL079110.
Tjiputra, J. F., N. Goris, S.K. Lauvset, C. Heinze, A. Olsen, J. Schwinger, and R. Steinfeldt (2018), Mechanisms and detections of multi-decadal oxygen changes in the interior subpolar North Atlantic, Geophys. Res. Lett., 45, 4218-4229, doi:10.1029/2018GL077096.
Rhein, M., R. Steinfeldt, D. Kieke, I. Stendardo and I. Yashayaev (2017), Ventilation variability of Labrador Sea Water and its impact on oxygen and anthropogenic carbon, Phil. Trans. R. Soc. A, 375(2102), doi:10.1098/rsta.2016.0321.
Mertens, C., W. Böke, K. Bulsiewicz, L. Castro del Guardia, A. Christodoulou, R. Cordts, L. Kappertz, J. Köhler, R. Nü, A. Roessler, A. Schneehorst, I. Sonntag, M. Spanknebel, J. Stake, R. Steinfeldt, H.-H. Uhde, T. Wegehaupt, and M. Zeiss (2017), Water Circulation in the Subpolar North Atlantic - Cruise No. MSM43 - May 25 - June 27, 2015 - St. John's (Canada)- Nuuk (Greenland). MARIA S. MERIAN-Berichte, DFG-Senatskommission für Ozeanographie, doi:10.2312/cr_msm43.
de la Paz, M., M. I. Garcia-Ibanez, R. Steinfeldt, A. F. Rios, und F. F. Perez (2017), Ventilation versus biology: What is the controlling mechanism of nitrous oxide distribution in the North Atlantic? Global Biogeochem. Cycles, 31, 745-760, doi:10.1002/2016GB005507.
Lambelet, M., T. van de Flierdt, K. Crocket, M. Rehkämper, K. Kreissig, B. Coles, M. J. Rijkenberg, L. J. Gerringa, H. J. de Baar, and R. Steinfeldt (2016), Neodymium isotopic composition and concentration in the western North Atlantic Ocean: results from the GEOTRACES GA02 section, Geochim. Cosmochim Acta, 1-29, doi:10.1016/j.gca.2015.12.019.
Lauvset, S. K., R. M. Key, A. Olsen, S. van Heuven, A. Velo, X. Lin, C. Schirnick, A. Kozyr, T. Tanhua, M. Hoppema, S. Jutterström, R. Steinfeldt, E. Jeansson, M. Ishii, F. F. Perez, T. Suzuki und S. Watelet (2016), A new global interior ocean mapped climatology: the 1 x1 GLODAP version 2, Earth Syst. Sci. Data, doi:10.5194/essd-8-297-2016, 8, 325-340.
Olsen, A., R. M. Key, S. van Heuven, S. K. Lauvset, A. Velo, X. Lin, C. Schirnick, A. Kozyr, T. Tanhua, M. Hoppema, S. Jutterström, R. Steinfeldt, E. Jeansson, M. Ishii, F. F. Perez, und T. Suzuki (2016), An internally consistent data product for the world ocean: the Global Ocean Data Analysis Project, version 2 (GLODAPv2), Earth Syst. Sci. Data, 8, 297-323, doi:10.5194/essd-8-297-2016.
Steinfeldt, R., J. Sültenfuß, M. Dengler, T. Fischer, und M. Rhein (2015), Coastal upwelling off Peru and Mauritania inferred from helium isotope disequilibrium, Biogeosci., 12, 7519-7533, doi:10.5194/bg-12-7519-2015.
Kieke, D., T. Breckenfelder, M. Büsing, T. Diekmann, J. Gerken, D. Hauck, M. Horn, M. Hüsener, M. Leiner, D. Papp, M. Raschke, A. Roessler, A. Schneehorst, R. Steinfeldt, L. Schneider, I. Stendardo, D. Thewes, H.-H. Uhde, and J. Winkel (2015), NA-LINK I (Linking Past and Present in the North Atlantic) - Cruise No. MSM38, May 07 - June 05, 2014 Cadiz (Spain) - St. John's (Canada). MARIA S. MERIAN-Berichte, DFG-Senatskommission für Ozeanographie, doi:10.2312/cr_msm38, 50 pgs.
Rios, A.F., L. Resplandy, M.I. Garcia-Ibanez, N.M. Fajar, A. Velo, X. A. Padin, R. Wanninkhof, R. Steinfeldt, G. Roson, and F. F. Perez (2015), Decadal acidification in the water masses of the Atlantic Ocean, PNAS, 112(32), 9950-9955, doi:10.1073/pnas.1504613112.
Schneider, L., D. Kieke, K. Jochumsen, E. Colbourne, I. Yashayaev, R. Steinfeldt, E. Varotsou, N. Serra, und M. Rhein (2015), Variability of Labrador Sea Water exported through Flemish Pass during 1993 - 2013, J. Geophys. Res., doi:10.1002/2015JC010939.
Heinze, C., S. Meyer, N. Goris, L. Anderson, R. Steinfeldt, N. Chang, C. Le Quere, und D. C. E. Bakker (2015), The ocean carbon sink - impacts, vulnerabilities, and challenges. Earth System Dynamics, 6, 327-358, doi:10.5194/esd-6-327-2015.
Fajar, N. M., E. F. Guallart, R. Steinfeldt, A. F. Rios, J. L. Pelegri, C. Pelejero, E. Calvo, und F. F. Perez (2015), Anthropogenic CO2 changes in the equatorial Atlantic Ocean. Prog. Oc., 134, 256-270, doi:10.1016/j.pocean.2015.02.004.
Rhein, M., D. Kieke, und R. Steinfeldt (2015), Advection of North Atlantic Deep Water from the Labrador Sea to the southern hemisphere, J. Geophys. Res., 120(4), 2471-2487, doi:10.1002/2014JC010605.
Stendardo, I., D. Kieke, M. Rhein, N. Gruber, und R. Steinfeldt (2015),Interannual to decadal oxygen variability in the mid-depth water masses of the eastern North Atlantic, Deep-Sea Res. I, 95(1), 85-98, doi:10.1016/j.dsr.2014.10.009.
Kieke, D., L. Abels, W. Böke, K. Bulsiewicz, C. Denker, D. Hauck, S. Hertzberg, N. Koopmann, R. Lahl, J. Lange, J. Löb, V. Müller, M. Peters, A. Roessler, R. Steinfeldt, I. Stendardo, and H.-H. Uhde (2014), NOAC (North Atlantic Changes) - Cruise No. MSM28, May 09 - June 20, 2013 - St. John's (Canada) - Tromsoe (Norway). MARIA S. MERIAN-Berichte, DFG-Senatskommission für Ozeanographie, doi:10.2312/cr_msm28, 41 pgs.
Mertens, C., M. Rhein, M. Walter, C. W. Böning, E. Behrens, D. Kieke, R. Steinfeldt, und U. Stöber (2014), Circulation and transports in the Newfoundland Basin, western subpolar North Atlantic, J. Geophys. Res., 119, 7772-7793, doi:10.1002/2014JC010019.
Schneider, A.,T. Tanhua, W. Roether, und R. Steinfeldt (2014), Changes in ventilation of the Mediterranean Sea during the past 25 yr, Ocean Sci., 10(1), 1-6, doi:10.5194/os-10-1-2014.
Steinfeldt, R., T. Tanhua, J. L. Bullister, R. M. Key, M. Rhein und J. Köhler (2010), Atlantic CFC data in CARINA. Earth System Science Data, 2, 1-15.
Tanhua, T., R. Steinfeldt, R.M. Key, P. Brown, N. Gruber, R. Wanninkhof, F. Perez, A. Körtzinger, A. Velo, U. Schuster, S. van Heuven, J.L. Bullister, I. Stenardo, M. Hoppema, A. Olsen, A. Kozyr, D. Pierrot, C. Schirnick, and D.W.R. Wallace (2010), Atlantic Ocean CARINA data: overview and salinity adjustments. Earth System Science Data, 2, 17-34, doi:10.5194/essdd-2-241-2009.
Steinfeldt, R., M. Rhein, J. L. Bullister, und T. Tanhua (2009), Inventory changes in anthropogenic carbon from 1997-2003 in the Atlantic Ocean between 20 S and 65 N. Global Biogeochem. Cycles, 23, GB3010, doi:10.1029/2008GB003311.
Huhn, O., W. Roether, and R. Steinfeldt (2008), Age spectra in North Atlantic Deep Water along the South American continental slope, 10 N - 30 S, based on tracer observations, Deep-Sea Res. I, 55(10), 1252-1276, doi:10.1016/j.dsr.2008.05.016.
Steinfeldt, R., M. Rhein, and M. Walter (2007), NADW transformation at the western boundary between 66 W/20 N and 10 N. Deep-Sea Res. I, 54(6), 835-855, doi:10.1016/j.dsr.2007.03.004.
Rhein, M., D. Kieke, und R. Steinfeldt (2007), Ventilation of the Upper Labrador Sea Water, 2003-2005. Geophys. Res. Lett., 34, L06603, doi:10.1029/2006GL028540.
Rhein, M., K. Kirchner, C. Mertens, R. Steinfeldt, M. Walter, and U. Fleischmann-Wischnath (2005), Transport of South Atlantic Water through the passages south of Guadeloupe and across 16 N, 2000-2004. Deep-Sea Res. I, 52(12), 2234-2249, doi:10.1016/j.dsr.2005.08.003.
Rhein, M., M. Walter, C. Mertens, R. Steinfeldt, und D. Kieke (2004), The circulation of North Atlantic Deep Water at 16 N, 2000 - 2003. Geophys. Res. Lett., 31, L14305, doi:10.1029/2004GL019993.
Steinfeldt, R., und M. Rhein (2004), Spreading velocities and dilution of North Atlantic Deep Water in the tropical Atlantic based on CFC time series. J. Geophys. Res., 109(C3), C03046, doi:10.1029/2003JC002050.
Steinfeldt, R. (2004), Ages and age spectra of Eastern Mediterranean Deep Water. J. Mar. Sys., 48(1-4), 67-81, doi:10.1016/j.jmarsys.2003.03.002.
Steinfeldt, R. (2001), Realistische Modellierung der tiefreichenden Zirkulation des Mittelmeers durch Simulation von Tracerverteilungen. Dissertation, Universität Bremen, 155 pp. (pdf, auf deutsch)
Steinfeldt, R. (1996), Untersuchung der Strukturen im Nachreflexionsgebiet konvergenter Stoßwellen, Diplomarbeit, Universität Hannover, 90 pp.
Participation in Scientific Cruises
FS Maria S. Merian, MSM-64 Subpolar North Atlantic Mai - Jun 2017 Southampton/UK - St. John's/Canada PI: D. Kieke
FS Maria S. Merian, MSM-53 Subpolar North Atlantic Mar - May 2016 Kiel/Germany - St. John's/Canada PI: D. Kieke
FS Maria S. Merian, MSM-43 Subpolar North Atlantic May - Jun 2015 St. John's/Canada - Nuuk/Greenland PI: C. Mertens
FS Maria S. Merian, MSM-38 Subpolar North Atlantic May - Jun 2014 Cadiz/Spain - St. John's/Canada PI: D. Kieke
FS Maria S. Merian, MSM-28 Subpolar North Atlantic May - Jun 2013 St. John's/Canada - Tromsö/Norway PI: D. Kieke
FS Maria S. Merian, MSM-21/2 Subpolar North Atlantic June - July 2012 Reykjavik/Island - Nuuk/Greenland PI: D. Kieke
FS Meteor, M85/1 Subpolar North Atlantic June - Aug 2011 Brest/France - St. John's/Canada PI: D. Kieke
FS Meteor, M82/2 Subpolar North Atlantic Aug - Sep 2010 St. John's/Canada - Ponta Delgada/Azores PI: M. Rhein
FS Maria S. Merian, MSM-12/3 Subpolar North Atlantic July - Aug 2009 Reykjavik/Island - Bremerhaven/Germany PI: M. Rhein
FS Thalassa, SUBPOLAR-08 Subpolar North Atlantic Aug - Sep 2008 St. John's/Canada - Brest/France PI: D. Kieke
FS Maria S. Merian, MSM 09/1 Subpolar North Atlantic July - Aug 2008 Bremen/Germany - St. John's/Canada PI: M. Rhein
FS Pelagia, 64PE278 Subpolar North Atlantic Oct - Nov 2007 Galway/Irland - Canical/Portugal PI: D. Kieke
FS Maria S. Merian, MSM 05/1 Subpolar North Atlantic Apr - May 2007 Las Palmas/Spain - St. John's/Canada PI: M. Rhein
FS Poseidon, P341 Central North Atlantic July - Aug 2006 Lisbon/Portugal - Vigo/Spain PI: M. Rhein
FS Meteor, M66/1 Tropical Atlantic Aug - Sep 2005 Las Palmas/Spain - Willemstad/Curacao PI: M. Rhein
FS Thalassa, SUBPOLAR Subpolar North Atlantic June - July 2005 Brest/France - St. John's/Canada PI: M. Rhein
FS Meteor, M62/1b Tropical Atlantic July - Aug 2004 Fort de France/Martinique - Fortaleza/Brazil PI: M. Rhein
FS Meteor, M62/1a Subtropical Atlantic July 2004 Ponta Delgada/Azores - Fort de France/Martinique PI: R. Steinfeldt
FS Meteor, M59/2 Subpolar North Atlantic July - Aug 2003 Reykjavik/Island - St. John's/Canada PI: M. Rhein
FS Sonne, S171 Tropical Atlantic May - June 2003 Recife/Brazil - Point a Pitre/Guadeloupe PI: M. Rhein
FS L'Atalante, CARIBINFLOW Tropical Atlantic Apr 2003 Fort de France/Martinique - Fort de France/Martinique PI: M. Rhein
FS Meteor, M53/3 Tropical Atlantic June - July 2002 Recife/Brazil - Pont a Pitre/Guadeloupe PI: M. Rhein
FS Meteor, M50/4 eastern North Atlantic July - Aug 2001 Reykjavik/Island - Rendsburg/Germany PI: W. Zenk
FS Aegaeo, Aegaeo eastern Mediterranean Oct - Nov 1998 Piräus/Greece - Piräus/Greece PI: A. Theocharis