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Coordinator
Ha Hagemann
Wikis 
AIO and NEMO-Europe🔑 AIO
Overall Objective
The main general aim is to improve the representation of the regional ocean and its interaction with the atmosphere in the COSMO-CLM and ICON-CLM.
State of the art, scientific developments
Regional climate models (RCMs) are tools for dynamical downscaling coarse results from global climate circulation models (CGCMsGCMs), which are nowadays mainly coupled atmosphere-ocean models (AOGCMs). Ideally, RCMs should be able to determine the regional climate without the influence of the CGCMsGCMs, except at the lateral boundaries. However, presently this is not the case for COSMO-CLM/ICON-CLM, since the lower boundary values over the sea are taken from the AOGCMs. This has a major impact on the quality of the regional model simulations as shown already for the Baltic Sea, the North Sea and the Mediterranean Sea. To overcome this problem regional coupled atmosphere-ocean models may be used for climate simulations. Several groups in the CLM-Community are working on the coupling of a regional ocean to COSMO-CLM/ICON-CLM.
Objectives of participating groups
Improve the representation of the ocean and the interaction with the atmosphere in the COSMO-CLM (Goethe University Frankfurt, BiK-F)
Better regional representation of the North Sea and Baltic Sea in climate simulations in the COSMO-CLM and ICON-CLM (Hereon, DWD)
Simulating polynya processes in the Laptev Sea and the Weddell Sea with a fully coupled A-I-O model (University Trier)
Assess the added value of high-resolution climatic hindcasts and scenarios for the Mediterranean when using coupled atmosphere-ocean models (IMK-TRO (KIT))
To get better accuracy, since in the CIRA simulations the lower boundary values over the sea are taken from the global coupled model CMCC-MED. A better regional representation of the Mediterranean Sea is also important in order to increase the accuracy also for climate simulations of the Alpine space (CIRA)
Carry out simulations over the Southern Ocean to investigate seasonal simulations covering the confluence region of the Brazil and Malvinas currents, where many oceanic eddies occur (C2SM-ETHZ). Thereby two major questions are addressed:
- What is the impact of the highly resolved SST on fluxes between the atmosphere and the ocean and on the lower troposphere? Are highly resolved SSTs required to realistically represent fluxes of heat and freshwater in that region?
- How are these processes affected by the coupling between the atmosphere and the ocean?
Overview
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The red boxes give a rough idea of the domains, however, they do not represent the exact boundaries.
Models: Ocean / Ice / Runoff / Wave | Region | Scientists | Institution | Status |
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NEMO / (LIM) / TRIP | Mediterranean Sea, North Sea, Baltic Sea | Jennifer Brauch, Bodo Ahrens, Trang van Pham, Naveed Akhtar | GUF, BiK-F, DWD | no update available |
NEMO / (SI3) | North Sea, Baltic Sea | Vera Maurer | DWD | running |
NEMO / (LIM) / HD | North Sea, Baltic Sea | Ha Hagemann, Burkhardt Rockel | Hereon | running |
TRIM / CICE / HD | North Sea, Baltic Sea | Ha Hagemann, Burkhardt Rockel | Hereon | development stopped |
NEMO / (LIM) / /WAM | North Sea, Baltic Sea | Anne Wiese | Hereon | running |
FESOM / FESOM | CCLM / | Arctic, Laptev Sea, Svalbard | Oliver Gutjahr | MPI-M |
no update available | ||||
NEMO?/ (LIM) / | (Western) Mediterranean, Northeast Atlantic | Hendrik Feldmann, Gerd Schädler, Hans-Jürgen Panitz | IMK-TRO (KIT) | no update available |
NEMO / (LIM) / | Mediterranean Sea | Andreas Will | BTU Cottbus |
no update available | ||||
NEMO / (LIM) / | Mediterranean Sea | Leone Cavicchia, Antonella Sanna, Silvio Gualdi and Paolo Oddo | CMCC | no update available |
ROMS / / | Southern Atlantic | David Byrne, Lukas Papritz | ETHZ | no update available |
MOM / SIS /ERGOM | Baltic Sea | Markus Meier |
, Hagen Radtke, Sven Karsten | IOW | running | ||
Ocean model / | Pavel Khain | IMS | planned | |
Ocean model / | CORDEX East Asia | Donghyun Lee | Pohang University of Science and Technology, South Korea | planned |
Meetings
Date | Meeting and Location | Documents | |
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2022/09/21 | CLM-Assembly Online Meeting | ||
2021/09/21 | CLM-Assembly Online Meeting | 🔑 Minutes | |
2021/03/16 | ICCARUS online | 🔑 Minutes | |
2020/09/14 | CLM-Assembly Online Meeting | 🔑 Minutes | |
2018/09/19 | CLM-Assembly in Karlsruhe | 🔑 Minutes | |
2018/03/01 | ICCARUS in Offenbach | 🔑 Minutes | |
2017/09/19 | CLM-Assembly in Graz | ||
2017/03/09 | ICCARUS in Offenbach | 🔑 Minutes | |
2016/09/19 | CLM-Assembly in Lüneburg |
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2013/08/29 | CLM-Community Assembly in Zürich | ||
2013/03/07 | COSMO/CLM Seminar in Offenbach | ||
2012/09/17 | CLM-Community Assembly in Leuven |  Minutes [52 kb]
| 🔑 Minutes |
2012/03/08 | COSMO/CLM Seminar in Offenbach |
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2011/08/30 | CLM-Community Assembly in Cava de' Tirreni
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2011/03/03 | COSMO/CLM Seminar in Langen
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2010/08/31 | Startup Meeting in Berlin |
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DocumentsDocuments
2018 🔑 Annual WG Presentation at Assembly
2017🔑 Annual WG Presentation at Assembly
2011/08/26 
Annual report 2011 [79 Kb]
2012/09/13 Annual report 2012 [88 kb]
2013/09/17 Annual report 2013 [110kb] Annual report 2013
Publications
Akhtar, N., J. Brauch, B. Ahrens (2017): Climate Modeling over the Mediterranean Sea: Impact of Resolution and Ocean Coupling. Clim. Dyn. DOI 10.1007/s00382-017-3570-8
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Byrne, D., M. Münnich, I. Frenger, N. Gruber (2016): Mesoscale atmosphere-ocean coupling enhances the transfer of wind energy into the ocean, Nature Communications 7, doi:10.1038/ncomms11867
Gröger, M., Dieterich, C., Haapala, J., Ho-Hagemann, H.T.M., Hagemann, S., Jakacki, J., May, W., Meier, H.E.M., Miller, P.A., Rutgersson, A., & Wu, L. (2021): Coupled regional Earth system modeling in the Baltic Sea region. Earth Syst. Dynam., 12, 939–973, doi:10.5194/esd-12-939-2021
Hagemann, Stefan, & Ho-Hagemann, Ha T.M. (2021). The Hydrological Discharge Model - a river runoff component for offline and coupled model applications (5.1.0). Zenodo. https://doi.org/10.5281/zenodo.5707587
Ho-Hagemann, H.T.M. (2022). The OASIS3-MCT Coupling Interface for ICON-CLM (1.0.0). Zenodo. https://doi.org/10.5281/zenodo.5833118
Ho-Hagemann, H.T.M., Hagemann, S., Grayek, S., Petrik, R., Rockel, B., Staneva, J., Feser, F., & Schrum, C. (2020): Internal Model Variability of the Regional Coupled System Model GCOAST-AHOI. Atmosphere 2020, 11, 227, doi:10.3390/atmos11030227
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Ho-Hagemann H, Rockel B, Kapitza H and Geyer B (2013): COSTRICE-an atmosphere-ocean-sea ice model coupled system using OASIS3, HZG Report (2013-5), 24pp
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Rockel, B., J. Brauch, O. Gutjahr, N. Akhtar, H.T.M. Ho-Hagemann (2017): Gekoppelte Modellsysteme: Atmosphäre und Ozean. Promet - Meteorologische Fortbildung, 99, 65-75
Rockel, B. (2022). SPICE (Starter Package for ICON-CLM Experiments) (1.1). Zenodo. https://doi.org/10.5281/zenodo.6517710
Ruti P.M., S. Somot, F. Giorgi, C. Dubois, E. Flaounas, A. Obermann, A. Dell'Aquila, G. Pisacane, A. Harzallah, E. Lombardi, B. Ahrens, N. Akhtar, A. Alias, T. Arsouze, R. Aznar, S. Bastin, J. Bartholy, K. Béranger, J. Beuvier, S. Bouffies-Cloché, J. Brauch, W. Cabos, S. Calmanti, J.-C. Calvet, A. Carillo D. Conte, E. Coppola, V. Djurdjevic, P. Drobinski, A. Elizalde-Arellano, M. Gaertner, P. Galàn, C. Gallardo, S. Gualdi, M. Goncalves, O. Jorba, G. Jordà, B. L'Heveder, C. Lebeaupin-Brossier, L. Li, G. Liguori, P. Lionello, D. Maciàs-Moy, P. Nabat, B. Onol, B. Rajkovic, K. Ramage, F. Sevault, G. Sannino, M.V. Struglia, A. Sanna, C. Torma, V. Vervatis (2016): MED-CORDEX initiative for Mediterranean Climate studies. Bull. of the American Meteorological Society, 97(7), 1187-1208, doi: 10.1175/BAMS-D-14-00176.1
Wahle, K.; Staneva, J.; Koch, W.; Fenoglio-Marc, L.; Ho-Hagemann, H.T.M.; Stanev, E.V.: An atmosphere-wave regional coupled model: improving predictions of wave heights and surface winds in the southern North Sea. In: Ocean Science. Vol. 13 (2017) 2, 289 - 301. (DOI: 10.5194/os-13-289-2017)
Wiese, A., Staneva, J., Ho-Hagemann, H.T.M., Grayek, S., Koch, W., & Schrum, C. (2020): Internal Model Variability of Ensemble Simulations With a Regional Coupled Wave-Atmosphere Model GCOAST. Front. Mar. Sci. 7:596843, doi:10.3389/fmars.2020.596843
Will, A., N. Akhtar, J. Brauch, M. Breil, E. Davin, H. T. M. Ho-Hagemann, E. Maisonnave, M. Thürkow, and S. Weiher (2017): The COSMO-CLM 4.8 regional climate model coupled to regional ocean, land surface and global earth system models using OASIS3-MCT: description and performance. Geoscientific Model Development, 10:1549–1586, doi:10.5194/gmd-10-1549-2017
Members
Bodo Ahrens, Naveed Akhtar, Jennifer Brauch, Sandra Brunnabend, David Byrne, Manuel Dröse, Hendrik Feldmann, Claudia Frauen, Barbara Früh, Oliver Gutjahr, Ha Hagemann, Günther Heinemann, Astrid Kerkweg, Svenja Kohnemann, Praveen Kumar, Donghyun Lee, Hans-Jürgen Panitz, Lukas Papritz, Cristina Primo, Burkhardt Rockel, Gerd Schädler, Christoph Stegert, Trang Van Pham, Andreas Alberto Elizalde, Imoleayo Ezekiel Gbode, Ha Hagemann, Mostafa Hamouda, Shabeh Ul Hasson, Günther Heinemann, Samuel Helsen, Ines Hoeschel, Sven Karsten, Astrid Kerkweg, Moritz Kirschner, Svenja Kohnemann, Melissa Körlin, Donghyun Lee, Yunfei Li, Tania Liartsi, Xiao Luo, Sylvain Marchi, Vera Maurer, Sofia Papadogiannaki, Lukas Papritz, Charles Pelletier, Trang Van Pham, Cristina Primo Ramos, Hagen Radtke, Burkhardt Rockel, Harald Sodemann, Het Thakkar, Nele Tim, Alexandra Touzeau, Anne Wiese, Andreas Will, Rolf Zentek
Mailing List
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Coordinator Alumni List
Jennifer Brauch (2016 - 2021)
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Burkhardt Rockel (2010 - 2014)
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