CMIP5 Historical 시나리오에 근거한 WRF를 이용한 한반도 중심의 동북아시아 상세기후
Present-Day Climate of the Korean Peninsula Centered Northern East Asia Based on CMIP5 Historical Scenario Using Fine-Resolution WRF
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참고문헌
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초록
In this study, climate over Korea based on the Historical scenario induced byHadGEM2-AO is simulated by WRF. For this purpose, a system that can be used be fornumerical integration over the Far East Asian area of the center of the Korean Peninsula with12.5 km-horizontal resolution was set-up at “Haebit”, the early portion of KMA SupercomputerUnit-3. Using the system, the downscaling experiments were conducted for the period1979-2010. The simulated results of HadGEM2-AO and WRF are presented in terms of 2 mtemperatureand precipitation during boreal summer and winter of Historical for the period1981~2005, compared with observation. As for the mean 2 m-temperature, the general patternsof HadGEM2-AO and WRF are similar with observation although WRF showed lowervalues than observation due to the systematic bias. WRF reproduced a feature of the terrainfollowingcharacteristics reasonably well owing to the increased horizontal resolution. Both ofthe models simulated the observed precipitation pattern for DJF than JJA reasonably, while therainfall over the Korean Peninsula in JJA is less than observation. HadGEM2-AO in DJF 2 mtemperatureand JJA precipitation has warm and dry biases over the Korean Peninsula, respectively. WRF showed cold bias over JJA 2 m-temperature and wet bias over DJF precipitation. The larger bias in WRF was attributed to the addition of HadGEM2-AO’s bias to WRF’s systematicbias. Spatial correlation analysis revealed that HadGEM2-AO and WRF had above 0.8correlation coefficients except for JJA precipitation. In the EOF analysis, both models resultsexplained basically same phase changes and variation as observation. Despite the difference inmean and bias fields for both models, the variabilities of the two models were almost similarwith observation in many respects, implying that the downscaled results can be effectively usedfor the study of regional climate around the Korean Peninsula.
Abstract
In this study, climate over Korea based on the Historical scenario induced byHadGEM2-AO is simulated by WRF. For this purpose, a system that can be used be fornumerical integration over the Far East Asian area of the center of the Korean Peninsula with12.5 km-horizontal resolution was set-up at “Haebit”, the early portion of KMA SupercomputerUnit-3. Using the system, the downscaling experiments were conducted for the period1979-2010. The simulated results of HadGEM2-AO and WRF are presented in terms of 2 mtemperatureand precipitation during boreal summer and winter of Historical for the period1981~2005, compared with observation. As for the mean 2 m-temperature, the general patternsof HadGEM2-AO and WRF are similar with observation although WRF showed lowervalues than observation due to the systematic bias. WRF reproduced a feature of the terrainfollowingcharacteristics reasonably well owing to the increased horizontal resolution. Both ofthe models simulated the observed precipitation pattern for DJF than JJA reasonably, while therainfall over the Korean Peninsula in JJA is less than observation. HadGEM2-AO in DJF 2 mtemperatureand JJA precipitation has warm and dry biases over the Korean Peninsula, respectively. WRF showed cold bias over JJA 2 m-temperature and wet bias over DJF precipitation. The larger bias in WRF was attributed to the addition of HadGEM2-AO’s bias to WRF’s systematicbias. Spatial correlation analysis revealed that HadGEM2-AO and WRF had above 0.8correlation coefficients except for JJA precipitation. In the EOF analysis, both models resultsexplained basically same phase changes and variation as observation. Despite the difference inmean and bias fields for both models, the variabilities of the two models were almost similarwith observation in many respects, implying that the downscaled results can be effectively usedfor the study of regional climate around the Korean Peninsula.
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