PD Dr. rer. nat. Iris Kriest

Scientist in research unit  Biogeochemichal Modeling

Room 08
"Seeburg", Düsternbrooker Weg 2
Tel.: +49 431 600-4033
Fax: +49 431 600-4469
E-Mail: ikriest(at)geomar.de

GEOMAR Helmholtz Centre for Ocean Research Kiel
Düsternbrooker Weg 20
24105 Kiel

Research Interests

My research foci are description of biogeochemical processes in large-scale models, assessment of model skill,  and calibration of biogeochemical model parameters (constants) on a global scale. This involves analysis and synthesis of observations, as well as development and tests of different metrics for global model optimization. For my work I mainly use the  "Transport Matrix Method" developed by  Samar Khatiwala.

Education and Employment

  • 2019 Habilitation at Kiel University with the thesis "Towards integrated assessment and calibration of global biogeochemical ocean models"
  • since 2004 Research Scientist at IFM-GEOMAR, now GEOMAR | Helmholtz Centre for Ocean Research Kiel
  • 2002–2004  PostDoc, Max-Planck-Institute for Meteorology, Hamburg
  • 1999–2002  PostDoc, Institute for Marine Research, Kiel
  • 1995–1999  PhD student, Institute for Marine Research, Kiel
  • 1994  Scholarship (DAAD), Department of Fisheries and Oceans, St. John's, NF, Canada
  • 1994  Diploma in Biology, Institute for Marine Research Kiel, Christian-Albrechts-University of Kiel


  • 2019 R/V Meteor M158 (tropical/subtropical Atlantic)
  • 2016 R/V Meteor M130 (tropical/subtropical Atlantic)
  • 1997 R/V Sonne SO120 (Arabian Sea)
  • 1995 R/V M32/5 Meteor (Indian Ocean/Arabian Sea)
  • 1993 R/V Meteor M25/2 (Mediterranean Sea)

External Funding

 SFB 754 “Climate-Biogeochemistry Interactions in the Tropical Ocean” - Subproject B8 "The role of zooplankton in N-, P- and C-cycling and for the oxygen budget of tropical oxygen minimum zones” (German Science Foundation, DFG, Funding Period: 2016 – 2019)

PALMOD (German Climate Modeling Initiative) "From the Last Interglacial to the Anthropocene - Modeling a Complete Biogeochemical Cycle" - Workpackage 4.1 "A Model Calibration Framework Exemplified for the Ocean Biochemical Component" (Bundesministerium für Bildung und Forschung, Funding Period: 2015-2019)

CUSCO "Coastal Upwelling System in a Changing Ocean" - Workpackages 5 and 6 (Bundesministerium für Bildung und Forschung, Funding Period: 2019-2021)

Publications (link to OceanRep)