New coupled atmosphere-ocean-ice system COSMO-CLM/NEMO: assessing air temperature sensitivity over the North and Baltic Seas

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...

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Bibliographic Details
Main Authors: Trang Van Pham, Jennifer Brauch, Christian Dieterich, Barbara Frueh, Bodo Ahrens
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2014
Subjects:
Coupled model
Atmosphere
ocean-sea-ice interaction
Baltic Sea
North Sea
COSMO-CLM
NEMO
OASIS3
Oceanography
GC1-1581
Sea ice
Online Access:https://doaj.org/article/4de003339a2f4922a96160854fb82fcc
Description
Summary: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.

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