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Janna Köhler

Janna Köhler
Janna Köhler
  • Tel: +49 (0)421 218-62150
  • Fax: +49 (0)421 218-62165
  • Email: jannak [at] uni-bremen.de

Research Interests

  • internal wave propagation and energy flux
  • variability in the internal wave field and turbulent mixing
  • oceanographic processes at hydrothermal vents
  • time series measurements
Curriculum Vitae  
since 12/2013 research scientist (Postdoc), Institute of Environmental Physics (IUP), Bremen
12/2013 Ph. D. (Dr. rer. nat.) in physics, University of Bremen
since 02/2010 research scientist, Institute of Environmental Physics (IUP), Bremen
10/2009 diploma in physics, University of Bremen
2006-2009 graduate program in physics with emphasis on theoretical physics and oceanography, University of Bremen
2004-2006 undergraduate program in physics, Universit of Bremen
Projects  
DFG Transregio 181 "Energy transfer in Atmosphere and Ocean" Energy transfer through low mode internal waves
DFG Temporal variability in the internal wave field and vertical mixing in the North Atlantic
DFG Turbulent mixing in the Deep Western Boundary Current of the North Atlantic at 16°N
Publications
Löb, J., J. Köhler, C. Mertens, M. Walter, Z. Li, J.-S. von Storch, Z, Zhao, und M. Rhein (2020), Observations of the low mode internal tide and its interaction with mesoscale flow south of the Azores, J. Geophys. Res. Ocean, doi:10.1029/2019JC015879.
Mertens, C., J. Köhler, M. Walter, J.-S. von Storch and M. Rhein (2019), Observations and Models of Low Mode Internal Waves in the Ocean, in: C. Eden and A. Iske (eds.), Energy Transfers in Atmosphere and Ocean, Mathematics of Planet Earth 1, Springer Nature Switzerland AG, 127-144, doi:10.1007/978-3-030-05704-6_4.
Schmid, F., M. Peters, M. Walter, C. Devey, S. Petersen, I. Yeo, J. Köhler, J.W. Jamieson, S. Walker, J. Sültenfuß (2019), Physico-chemical properties of newly discovered hydrothermal plumes above the Southern Mid-Atlantic Ridge (13°-33°S). Deep Sea Research Part I: Oceanographic Research Papers., doi:10.1016/j.dsr.2019.04.010.
Köhler, J., M. Walter, C. Mertens, J. Stiehler, Z. Li, Z. Zhao, J.-S. von Storch, and M. Rhein (2019), Energy Flux Observations in an Internal Tide Beam in the Eastern North Atlantic. J. Geophys. Res. Ocean, 124, 5747–5764, doi:10.1029/2019JC015156.
Devey, C.W., N. Augustin, A. Brandt, N. Brenke, J. Köhler, L. Lins, C. Schmidt, and I.A. Yeo (2018), Habitat characterization of the Vema Fracture Zone and Puerto Rico Trench. Deep Sea Research Part II, Topical Studies in Oceanography, 148, 7-20, doi:10.1016/j.dsr2.2018.02.003.
Köhler, J., G.S. Völker, and M. Walter (2018), Response of the internal wave field to remote wind forcing by tropical cyclones. J. Phys. Oceanogr., 48, 317-328, doi:10.1175/JPO-D-17-0112.1.
Köhler, J., C. Mertens, M. Walter, U. Stöber, M. Rhein and T. Kanzow (2014), Variability in the internal wave field induced by the Atlantic Deep Western Boundary Current at 16°N. J. Phys. Oceanogr., 44(2), 492-516, doi:10.1175/JPO-D-13-010.1.
Köhler, J. (2013), Long-term variability of internal waves and diapycnal mixing: The role of the North Atlantic Deep Western Boundary Current. Ph.D. Thesis, University of Bremen (pdf, in english)
Steinfeldt, R., T. Tanhua, J. L. Bullister, R. M. Key, M. Rhein, and J. Köhler (2010), Atlantic CFC data in CARINA. Earth System Science Data, 2, 1-15, doi:10.5194/essd-2-1-2010.
Köhler, J. (2009), Hydrothermal fluxes at the 5°S vent site, southern Mid Atlantic Ridge. Diploma Thesis, University of Bremen.
Participation in Scientific Cruises
FS Poseidon, Pos 533-2 tropical Atlantic March 2019 Las Palmas/Spain - Sao Miguel/Azores PI: J. Köhler
FS Poseidon, Pos 523 tropical Atlantic May 2018 Sao Miguel/Azores - Sao Miguel/Azores PI: M. Walter
FS Poseidon, Pos 516 tropical Atlantic August 2017 Sao Miguel/Azores - Sao Miguel/Azores PI: M. Walter
FS Polarstern, PS101 Arctic Sept. - Oct. 2016 Tromsö/Norway - Bremerhaven/Germany PI: A. Boetius
FS Maria S. Merian, MSM-43 subpolar North Atlantic Mai - Juni 2015 St. John's/Canada - Nuuk/Greenland PI: C. Mertens
FS Sonne, So237 subtropical Atlantic Dec 2014 - Jan 2015 Las Palmas/Spain - Santo Domingo/Dominican Republic PI: C. Devey
FS Polarstern, PS86 Arctic Jul 2014 Tromsö/Norway - Tromsö/Norway PI: A. Boetius
FS Maria S. Merian, MSM-25 South Atlantic Jan - March 2013 Cape Town/South Africa - Mindelo/Cape Verde Islands PI: C. Devey
RV Roger Revelle, RR1209 Samoa Passage Jul - Aug 2012 Apia/Samoa - Apia/Samoa PI: M. Alford
FS Meteor, M85/2 subpolar North Atlantic Jun - Aug 2011 Brest/France - St. John's/Canada PI: D. Kieke
FS Meteor, M82/2 subpolarer North Atlantic Aug - Sep 2010 St. John's/Canada - Ponta Delgada/Azores PI: M. Rhein
FS Arni Fridriksson, SUBPOLAR-09 subpolar North Atlantic Nov 2009 Reykjavik/Island - Reykjavik/Island PI: A. Ströh
FS Meteor, M78/2 subtropical Atlantic Apr - May 2009 Port of Spain/Trinidad - Rio de Janeiro/Brazil PI: R. Seifert
FS Sonne, SO196 Okinawa-Trough, Pacific Feb - Mar 2008 Guam/USA - Manila/Philippines PI: G. Rehder