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http://dx.doi.org/10.5467/JKESS.2011.32.7.750

Regional Climate Simulations over East-Asia by using SNURCM and WRF Forced by HadGEM2-AO  

Choi, Suk-Jin (School of Earth and Environmental Sciences, Seoul National University)
Lee, Dong-Kyou (School of Earth and Environmental Sciences, Seoul National University)
Oh, Seok-Geun (Department of Atmospheric Science, Kongju National University)
Publication Information
Journal of the Korean earth science society / v.32, no.7, 2011 , pp. 750-760 More about this Journal
Abstract
In this study, the reproducibility of the simulated current climate by using two regional climate models, such as Seoul National University Regional Climate Model (SNURCM) and Weather Resuearch and Forecasting (WRF), is evaluated in advance to produce the standard regional climate scenario of future climate. Within the evaluation framework of a COordinated Regional climate Downscaling EXperiment (CORDEX), 28-year-long (1978-2005) regional climate simulation was conducted by using the Hadley Centre Global Environmental Model (HadGEM2-AO) global simulation data of the National Institute of Meteorological Research (NIMR) as a lateral boundary forcing. The simulated annual surface temperatures were in good agreement with the observation; the spatial correlation coefficients between each model and observation were over 0.98. The cold bias, however, were shown over the northern boundary in the both simulated results. In evaluation of the simulated precipitation, the skill was reasonable and good. The spatial correlation coefficients for the precipitation over the land area were 0.85 and 0.79 in SNURCM and WRF, respectively. It is noted that two regional climate models (RCMs) have different characteristics for the distribution of precipitation over equatorial and midlatitude areas. SNURCM shows better distribution of the simulated precipitation associated with the East Asia summer monsoon in the mid-latitude areas, but WRF shows better in the equatorial areas in comparison to each other. The simulated precipitation is overestimated in summer season (JJA) rather than in spring season (MAM), whereas the spatial distribution of the precipitation in spring season corresponds to the observation better than in summer season. Also the RCMs were capable of reproducing the annual variability of the maximum amount and its timing in July, in which the skills over the inland area were in better agreement with the observation than over the maritime area. The simulated regional climates, however, have the limitation to represent the number of days for extremely hot temperature and heavy rainfall over South Korea.
Keywords
HadGEM2-AO; SNURCM; WRF; CORDEX East-Asia; Evaluation;
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Times Cited By KSCI : 9  (Citation Analysis)
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