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New coupled atmosphere-ocean-ice system COSMO-CLM/NEMO: assessing air temperature sensitivity over the North and Baltic Seas
SMHI, Research Department, Oceanography.
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2014 (English)In: Oceanologia, ISSN 0078-3234, Vol. 56, no 2, 167-189 p.Article in journal (Refereed) Published
Abstract [en]

This paper introduces a newly established coupled atmosphere-ocean-ice system with the regional climate model COSMO-CLM and the ocean-sea-ice model NEMO for the North and Baltic Seas. These two models are linked via the OASIS3 coupler. Experiments with the new coupled system and with the stand-alone COSMO-CLM model forced by ERA-Interim re-analysis data over the period from 1985 to 1994 for the CORDEX Europe domain are carried out. The evaluation results of the coupled system show 2-m temperature biases in the range from -2.5 to 3 K. Simulated 2-m temperatures are generally colder in the coupled than in the uncoupled system, and temperature differences vary by season and space. The coupled model shows an improvement compared with the stand-alone COSMO-CLM in terms of simulating 2-m temperature. The difference in 2-m temperature between the two experiments are explained as downwind cooling by the colder North and Baltic Seas in the coupled system.

Place, publisher, year, edition, pages
2014. Vol. 56, no 2, 167-189 p.
Keyword [en]
Coupled model, Atmosphere, ocean-sea-ice interaction, Baltic Sea, North Sea, COSMO-CLM, NEMO, OASIS3
National Category
Oceanography, Hydrology, Water Resources
Research subject
URN: urn:nbn:se:smhi:diva-155DOI: 10.5697/oc.56-2.167ISI: 000337549100002OAI: diva2:800901
Available from: 2015-04-08 Created: 2015-03-26 Last updated: 2015-04-08Bibliographically approved

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Dieterich, ChristianAhrens, Bodo
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