摘要
利用ERA40再分析资料,评估了参与国际耦合模式比较计划第五阶段的CCSM4模式对东亚夏季不同要素场的气候态和年际变化的模拟能力,并与第三阶段的CCSM3模式进行了对比。结果表明:1CCSM3和CCSM4均能较好地模拟出东亚夏季海平面气压、850hPa风场、500hPa高度场气候态的空间分布特征,总体来说,CCSM4对各要素的模拟效果更好;2虽然模式对东亚地区不同要素年际变率的模拟能力整体偏弱,但相对来说,CCSM4的模拟能力有不同程度的提高;3模式对副高、印度热低压的变化趋势有一定的模拟能力,但CCSM3对副高面积指数,印度热低压及印度热低压槽指数的模拟效果反而表现的更好。对于三种典型的东亚夏季风指数,虽然CCSM4的模拟能力较CCSM3有一定的提高,但也均不能模拟出东亚夏季风的变化特征。
Based on European Center for Medium Range Weather Forecasting 40-year reanalysis data (ERA40) for 1960-1999,the capability to simulate summer atmospheric general circulation and interannual variation over East Asia using the models CCSM4 and CCSM3 was explored.We found that the basic spatial distribution patterns of the climatology of sea level pressure,850 hPa wind and 500 hPa potential height in summer in East Asia is well captured by both CCSM4 and CCSM3.However,the former performs far better across all three aspects.The capability of CCSM4 to simulate interannual variability in sea level pressure,850hPa wind and 500hPa potential height in the last 40 years is improved to some degree,though on the whole,simulated interannual variability of different climate elements by both models is quite poor.The models have some ability to capture trends in subtropical High and India Low Pressure,but according to the correlation coefficient of the models with ERA40,the ability of CCSM3 to simulate the subtropical High area index,India Low Pressure system index and India Low Pressure slot index is better.From the evaluation of the three typical East Asian summer monsoon indexes,even though the performance of CCSM4 in simulating interannual variability is superior,both models fail to capture variation features of the East Asian monsoon.
出处
《资源科学》
CSSCI
CSCD
北大核心
2014年第9期1852-1859,共8页
Resources Science
基金
中国气象局预报员专项项目(编号:CMAYBY2014-070)
关键词
CCSM
东亚地区
大气环流
模拟能力
对比分析
CCSM
East Asia
atmospheric general circulation
simulation capability
comparison analyses
