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

作者：Van Pham Trang^*; Brauch Jennifer; Dieterich Christian; Frueh Barbara; Ahrens Bodo

来源：Oceanologia, 2014, 56(2): 167-189.

DOI：10.5697/oc.56-2.167

• Coupled model
• Atmosphere
• ocean-sea-ice interaction
• Baltic Sea
• North Sea
• COSMO-CLM
• NEMO
• OASIS3

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.

• 出版日期2014
• 单位国家气候中心