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http://dx.doi.org/10.5467/JKESS.2011.32.7.732

Simulation Skills of RegCM4 for Regional Climate over CORDEX East Asia driven by HadGEM2-AO  

Oh, Seok-Geun (Department of Atmospheric Science, Kongju National University)
Suh, Myoung-Seok (Department of Atmospheric Science, Kongju National University)
Cha, Dong-Hyun (International Pacific Research Center, University of Hawaii at Manoa)
Choi, Suk-Jin (School of Earth and Environmental Sciences, Seoul National University)
Publication Information
Journal of the Korean earth science society / v.32, no.7, 2011 , pp. 732-749 More about this Journal
Abstract
In this study, 27-year (1979-2005) regional climate over the CORDEX East Asia domain was reproduced using a regional climate model, RegCM4, driven by HadGEM2-AO output, and the model's simulation skill was evaluated in terms of surface air temperature and precipitation. The RegCM4 reasonably simulated the spatial distribution and interannual variability and seasonal variability of surface air temperature, while it had systematic biases in the simulation of precipitation. In particular, simulated rainband of East Asian summer monsoon was southward shifted below $30^{\circ}N$ as compared with the observation, thereby, summer mean precipitation over South Korea was significantly underestimated. Simulated temperature from the RegCM4 driven by the HadGEM2-AO output was comparable to that driven by the reanalysis. However, the RegCM4 driven by the HadGEM2-AO had prominently poor skill in the simulation of precipitation. This can be associated with the distorted monsoon circulations in the driving data (i.e., HadGEM2-AO) such as southward shifted low-level southwesterly, which resulted in the erroneous evolution of East Asian summer monsoon simulated by RegCM4.
Keywords
HadGEM2-AO; RegCM4; CORDEX; simulation skill; East Asian summer monsoon;
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Times Cited By KSCI : 9  (Citation Analysis)
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