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CORDEXⅡ 동아시아 지역에서 지면-강수 물리과정에 따른 RegCM4.0의 현재 기후 모의 수준

Impact of Land Surface and Cumulus Parameterization Schemes on the Simulation Skills of RegCM4.0 over CORDEX-East Asia Phase 2 domain

서명석|오석근|김태준
기후연구소 (KU Climate Research Institute)|2017.06|기후연구 (Journal of Climate Research)|제12권 제2호|pp. 181-197|DOI http://dx.doi.org/10.14383/cri.2017.12.2.181

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키워드

RegCM4.0CORDEX-East Asia Phase 2simulation skillCORDEX 동아시아 2단계모의 수준물리과정 모수화parameterization of physical process

초록

We investigated on the proper combination of physical parameterization schemes of RegCM4.0 for the simulation of regional climate over CORDEX-East Asia Phase 2 domain. Based on the Lee(2016)’s sensitivity experiments for the four combination using two land surface schemes and two cumulus parameterization schemes during 5 years (1979-1983), we selected the two combinations (CE: CLM+Emanuel and BG: BATS+Grell). The ER A-Interim was used as lateral boundary data of RegCM4.0 for the two experiments during 25 years (1981-2005). Simulation skills of temperature were similar in the two combination of physical processes irrespective of seasons and locations. However, there were a substantial differences in the simulation skills of precipitation according to the combination of physical processes, which were better in CE than BG combination. In general, the CE combination better simulated the precipitation characteristics in July and August over South Korea than BG combination, in terms of frequency and amount of precipitation according to the intensity. The superior skills of CE in simulating precipitation over South Korea can be related to the better simulation of seasonal march of the East Asian summer monsoon including the location and intensity of the North Pacific high pressure system than BG. The results suggested that the CE combination can simulate the climate characteristics in the CORDEX East Asia Phase 2 region better than the BG combination.

Abstract

We investigated on the proper combination of physical parameterization schemes of RegCM4.0 for the simulation of regional climate over CORDEX-East Asia Phase 2 domain. Based on the Lee(2016)’s sensitivity experiments for the four combination using two land surface schemes and two cumulus parameterization schemes during 5 years (1979-1983), we selected the two combinations (CE: CLM+Emanuel and BG: BATS+Grell). The ER A-Interim was used as lateral boundary data of RegCM4.0 for the two experiments during 25 years (1981-2005). Simulation skills of temperature were similar in the two combination of physical processes irrespective of seasons and locations. However, there were a substantial differences in the simulation skills of precipitation according to the combination of physical processes, which were better in CE than BG combination. In general, the CE combination better simulated the precipitation characteristics in July and August over South Korea than BG combination, in terms of frequency and amount of precipitation according to the intensity. The superior skills of CE in simulating precipitation over South Korea can be related to the better simulation of seasonal march of the East Asian summer monsoon including the location and intensity of the North Pacific high pressure system than BG. The results suggested that the CE combination can simulate the climate characteristics in the CORDEX East Asia Phase 2 region better than the BG combination.

참고문헌 (60)

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