Dr. rer. nat. Ulrike Löptien


Scientist at Research Unit Biogeochemical Modelling

Office:
Room 10
"Seeburg", Düsternbrooker Weg 2
Tel.: +49 431 600-4033
Fax: +49 431 600-1515
E-Mail: uloeptien(at)geomar.de

Address:
GEOMAR Helmholtz Centre for Ocean Research Kiel
Düsternbrooker Weg 20
24105 Kiel
Germany

Research Interests

  • Data exploration and modelling (Ocean, Atmosphere, Marine Biogeochemistry, Sea Ice)
  • Regional process studies (e.g. NAO, Baltic Sea, Tropical Pacific)
  • Parameter optimization, Gaussian Process Emulators

Education

  • 2000 2004  Ph.D in Meteorology at the Christian-Albrechts-University of Kiel
  • 1991 1999  Diploma in Mathematics at the Christian-Albrechts-University of Kiel, Germany

Publications

Number of items: 52.

Articles in a Scientific Journal - peer-reviewed

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Munkes, B., Löptien, U. and Dietze, H. (Submitted) Cyanobacteria Blooms in the Baltic Sea: A Review of Models and Facts. Open Access Biogeosciences (BG) . DOI 10.5194/bg-2020-151.

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Dietze, H. , Löptien, U. and Getzlaff, J. (2020) MOMSO 1.0 – an eddying Southern Ocean model configuration with fairly equilibrated natural carbon. Open Access Geoscientific Model Development, 13 . pp. 71-97. DOI 10.5194/gmd-13-71-2020.

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Hordoir, R., Axell, L., Höglund, A., Dieterich, C. , Fransner, F., Gröger, M. , Liu, Y., Pemberton, P., Schimanke, S. , Andersson, H., Ljungemyr, P., Nygren, P., Falahat, S., Nord, A., Jönsson, A., Lake, I., Döös, K. , Hieronymus, M., Dietze, H. , Löptien, U. , Kuznetsov, I., Westerlund, A. , Tuomi, L. and Haapala, J. (2019) Nemo-Nordic 1.0: a NEMO-based ocean model for the Baltic and North seas – research and operational applications. Open Access Geoscientific Model Development, 12 (1). pp. 363-386. DOI 10.5194/gmd-12-363-2019.

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Sauerland, V., Löptien, U. , Leonhard, C., Oschlies, A. and Srivastav, A. (2018) Error assessment of biogeochemical models by lower bound methods (NOMMA-1.0). Open Access Geoscientific Model Development, 11 (3). pp. 1181-1198. DOI 10.5194/gmd-2017-133.

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Pemberton, P., Löptien, U. , Hordoir, R., Höglund, A., Schimanke, S., Axell, L. and Haapala, J. (2017) Sea-ice evaluation of NEMO-Nordic 1.0: a NEMO–LIM3.6-based ocean–sea-ice model setup for the North Sea and Baltic Sea. Open Access Geoscientific Model Development, 10 (8). pp. 3105-3123. DOI 10.5194/gmd-10-3105-2017.

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Schartau, M. , Wallhead, P., Hemmings, J., Löptien, U. , Kriest, I. , Krishna, S., Ward, B. A., Slawig, T. and Oschlies, A. (2017) Reviews and syntheses: Parameter identification in marine planktonic ecosystem modelling. Open Access Biogeosciences (BG), 14 (6). pp. 1647-1701. DOI 10.5194/bg-14-1647-2017.

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Hordoir, R., Axell, L., Löptien, U. , Dietze, H. and Kuznetsov, I. (2015) Influence of sea level rise on the dynamics of salt inflows in the Baltic Sea. Open Access Journal of Geophysical Research: Oceans, 120 (10). pp. 6653-6668. DOI 10.1002/2014JC010642.

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Löptien, U. and Axell, L. (2014) Ice and AIS: ship speed data and sea ice forecasts in the Baltic Sea. Open Access The Cryosphere, 8 . pp. 2409-2418. DOI 10.5194/tc-8-2409-2014.

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Dietze, H. , Löptien, U. and Getzlaff, K. (2014) MOMBA 1.1 - a high-resolution Baltic Sea configuration of GFDL's modular ocean model. Open Access Geoscientific Model Development, 7 . pp. 1713-1731. DOI 10.5194/gmd-7-1713-2014.

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Dietze, H. and Löptien, U. (2013) Revisiting "nutrient trapping" in global coupled biogeochemical ocean circulation models. Open Access Global Biogeochemical Cycles, 27 (2). pp. 265-284. DOI 10.1002/gbc.20029.

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Löptien, U. , Martensson, S., Meier, H. E. M. and Höglund, A. (2013) Long-term characteristics of simulated ice deformation in the Baltic Sea (1962–2007). Open Access Journal of Geophysical Research: Oceans, 118 (2). pp. 801-815. DOI 10.1002/jgrc.20089.

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Meier, H. E. M., Höglund, A., Döscher, R., Andersson, H., Löptien, U. and Kjellström, E. (2011) Quality assessment of atmospheric surface fields over the Baltic Sea from an ensemble of regional climate model simulations with respect to ocean dynamics. Open Access Oceanologia, 53 (Suppl. 1). pp. 193-227. DOI 10.5697/oc.53-1-TI.193.

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Löptien, U. and Eden, C. (2010) Multidecadal CO2uptake variability of the North Atlantic. Open Access Journal of Geophysical Research: Atmospheres, 115 (D12). D12113. DOI 10.1029/2009JD012431.

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Löptien, U. , Eden, C., Timmermann, A. and Dietze, H. (2009) Effects of biologically induced differential heating in an eddy-permitting coupled ocean-ecosystem model. Open Access Journal of Geophysical Research: Oceans, 114 (C6). DOI 10.1029/2008JC004936.

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Löptien, U. , Gulev, S. K., Latif, M. , Zolina, O. and Soloviov, V. (2008) Cyclone life cycle characteristics over the Northern Hemisphere in coupled GCMs. Climate Dynamics, 31 (5). pp. 507-532. DOI 10.1007/s00382-007-0355-5.

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Löptien, U. and Ruprecht, E. (2005) Effect of Synoptic Systems on the Variability of the North Atlantic Oscillation. Open Access Monthly Weather Review, 133 (10). pp. 2894-2904. DOI 10.1175/MWR3007.1.

Articles in a Scientific Journal - without review

Book chapters


Löptien, U. and Eden, C. (2008) Simulating El-Nino in an eddy-resolving coupled ocean-ecosystem model. In: High Performance Computing in Science and Engineering 08. , ed. by Nagel, W. E.. Springer, Berlin, pp. 471-479.

Presentations


Dilmahamod, A. F., Karstensen, J. , Dietze, H. , Löptien, U. and Fennel, K. (2020) Generation mechanisms of mesoscale eddies in the Eastern Tropical North Atlnatic Ocean. [Talk] In: Ocean Sciences Meeting 2020. , 16.-21.02.2020, San Diego, USA .


Löptien, U. (2019) Optimizing pelagical biogeochemical model parameters - promises and pitfalls. [Invited talk] In: Commonwealth Scientific and Industrial Research Organisation (CSIRO). , 18.02.2019, Hobart, Australia .


Dietze, H. and Löptien, U. (2018) Spatial model resolution and projections of pelagic biogeochemistry into a warming future: the higher the better?. [Invited talk] In: Swedish Meteorological and Hydrological Institute (SMHI). , 24.09.2018, Norrköping, Sweden .


Löptien, U. and Dietze, H. (2018) Spatial resolution and projections of pelagic biogeochemistry into a warming future: the higher the better?. [Invited talk] In: Helmholtz-Zentrum Geesthacht (HZG). , 15.08.2018, Geesthacht, Germany .


Dietze, H. and Löptien, U. (2017) Preliminary results from a suite of simulations off Mauretania: On resolution, diabatic transports and oxygen. [Invited talk] In: Submesoscale Miniworkshop. , 19.10.2017, GEOMAR, Kiel, Germany .


Dietze, H. , Löptien, U. , Getzlaff, J. and Getzlaff, K. (2017) Eddies and biogeochemistry: from the Southern Ocean to the Baltic Sea. [Invited talk] In: Swedish Meteorological and Hydrological Institute (SMHI). , 12.01.2017, Norrköping, Sweden .


Kriest, I. , Dietze, H. , Löptien, U. and Schartau, M. (2017) Calibration and parameter identification of global marine biogeochemistry models. [Talk] In: PalMod Annual Retreat. , 22.02.2017, Lübeck, Germany .


Löptien, U. , Dietze, H. and Getzlaff, K. (2017) The effects of spurious mixing in the high resolution Baltic Sea model setup MOMBA. [Invited talk] In: Swedish Meteorological and Hydrological Institute (SMHI). , 10.01.2017, Norrköping, Sweden .


Löptien, U. , Dietze, H. , Getzlaff, J. and Prowe, A. E. F. (2016) Towards optimizing coupled 3-dimensional ocean circulation biogeochemical models: promises and pitfalls. [Invited talk] In: Swedish Meteorological and Hydrological Institute (SMHI). , 17.02.2016, Norrköping, Sweden .


Dietze, H. and Löptien, U. (2015) Eddies & Carbon in the Southern Ocean. [Talk] In: CARBOCHANGE Final Project Meeting 2015. , 19.-22.01.2015, Bergen, Norway .


Dietze, H. and Löptien, U. (2015) Simulating eddy-wind interaction with MOMBA. [Talk] In: 10. Baltic Sea Science Congress. , 15.-19.06.2015, Riga, Latvia .


Löptien, U. and Dietze, H. (2015) Parameters estimation in marine ecosystem models: limitations of typical standing stock observations. [Talk] In: EGU General Assembly 2015. , 12.–17.04.2015 , Vienna, Austria .


Dietze, H. , Getzlaff, J. and Löptien, U. (2013) Revisiting "Nutrient Trapping" in global coupled biogeochemical Ocean Circulation Models: Cause and remedy. [Talk] In: EGU General Assembly 2013. , 07.-12.04.2013, Vienna, Austria .


Löptien, U. and Dietze, H. (2013) Constraining parameters in state-of-the-art marine pelagic ecosystem models. Is it actually feasible?. [Talk] In: Baltic Sea Science Congress 2013. , 26.-30-08.2013, Klaipeda, Lithuania .


Löptien, U. and Meier, H. E. M. (2012) A trafficability index for winter navigation in the Baltic Sea. [Talk] In: 7. SAFEWIN assembly meeting. , 28.-29.08.2012, Espoo, Finland .


Löptien, U. , Maartensson, S., Meier, H. E. M. and Höglund, A. (2012) Ice stress modeling - state of the art. [Talk] In: 6. SAFEWIN assembly meeting. , 17.-18.04.2012, Turku, Finland .


Löptien, U. and Meier, H. E. M. (2011) The influence of increasing water turbidity on the sea surface temperature in the Baltic Sea: A model sensitivity study. [Talk] In: 8. Baltic Sea Science Congress (BSSC). , 22.-26.08.2011, St. Petersburg, Russia . DOI 10.1016/j.jmarsys.2011.06.001.


Löptien, U. , Maartensson, S., Meier, H. E. M. and Höglund, A. (2011) SAFEWIN: Analysis of modeled ice stresses (RCO-HELMI). [Talk] In: 5. SAFEWIN assembly meeting. , 26.-27.10.2011, St. Petersburg, Russia .


Löptien, U. , Eden, C. and Timmermann, A. (2008) Biologically induced circulation changes in the tropical Pacific as simulated with eddy-resolving coupled ocean-ecosystem model. [Talk] In: EGU General Assembly. , 15.04, Vienna, Austria .


Löptien, U. , Eden, C. and Timmermann, A. (2008) High resolution hybrid coupled modeling in the tropical Pacific. [Talk] In: EGU General Assembly. , 15.04, Vienna, Austria .


Löptien, U. , Eden, C. and Timmermann, A. (2008) WP2: Simulating ENSO in an eddy-resolving coupled ocean-ecosystem model - part II. [Talk] In: DYNAMITE-meeting. , 07.02, Bologna, Italy .


Löptien, U. , Eden, C. and Timmermann, A. (2008) WP4: Simulating ENSO in an eddy-resolving coupled ocean-ecosystem model - part I. [Talk] In: DYNAMITE-meeting. , 06.02, Bologna, Italy .

Conference posters

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Dietze, H. and Löptien, U. (2015) MOMSO - simulating eddying biogeochemistry in the Southern Ocean. [Poster] In: CARBOCHANGE Final Project Meeting 2015. , 19.-22.01.2015, Bergen, Norway .


Dietze, H. , Getzlaff, K. and Löptien, U. (2013) MOMBA 1.1 - A high-resolution Baltic Sea configuration of GFDL's MOM4p1d coupled ocean circulation ice model. [Poster] In: Baltic Sea Science Congress 2013. , 26.-30-08.2013, Klaipeda, Lithuania .


Dietze, H. and Löptien, U. (2012) Revisiting "Nutrient Trapping" in global coupled biogeochemical Ocean Circulation Models. [Poster] In: AGU Fall Meeting 2012. , 03.-07.12.2012, San Francisco, USA .

Theses - not published by a publisher

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Löptien, U. (2003) Effekte der Wechselwirkung zwischen Ozean und Atmosphäre auf die Nordatlantische Oszillation. (PhD/ Doctoral thesis), Christian-Albrechts-Universität, Kiel, Kiel, 98 pp.

This list was generated on Fri Sep 25 09:27:34 2020 CEST.