热带气象学报2011，Vol.27Issue(4)：569-576,8.DOI:10.3969/j.issn.1004-4965.2011.04.014
冬季黑潮延伸体异常增暖对东亚夏季风影响的数值试验
NUMERICAL EXPERIMENT ON THE EFFECT OF THE WARMER SST IN THE KUROSHIO EXTENSION IN WINTER ON THE EAST ASIAN SUMMER MONSOON
摘要
Abstract
The effect of the warmer SST in the Kuroshio Extension in winter on the East Asian summer monsoon (EASM) is investigated by numerical simulations using global general circulation model NCAR CAM3 . The results show that the anomalous warmer SST in the Kuroshio Extension in winter induces the enhancement and northward advancing of EASM. EASMI and LSTDI that characterize the EASM intensity show significant trend of enhancement after onset of the EASM. Moreover, LSTDI is more sensitive to the warmer SST. The low-level southwesterly monsoon is clearly strengthened in North China, South China Sea and the east of Philippine, while the westerly in the north (south) of the subtropical westerly jet axis is strengthened (weakened). Precipitation increases distinctly in North China, South China Sea, East China Sea, Yellow Sea and the east of Philippines, however, decreases obviously over Japan islands and adjacent sea area and the areas from the south of Yangtze River to Qinling in East China. North China is the key area most sensitive in the response of EASM to the positive SST anomaly in the Kuroshio Extension. The characteristic of surface air temperature shows consistently a warming trend. The whole rising of troposphere temperature between 30 ° and 50 ° enhances the land-sea thermal contrast, which plays an important role in the enhancement of EASM. Circulation and precipitation anomalies in China and its adjacent regions have a close correlation with the enhancement and northward extension of the subtropical high in the Western North Pacific.关键词
气候学/东亚夏季风/数值试验/海温异常增暖/黑潮延伸体Key words
climatology/ East Asian summer monsoon/ numerical experiment/ anomalous warm SST/ Kuroshio Extension分类
天文与地球科学引用本文复制引用
王晓丹,钟中,谭言科,杜楠..冬季黑潮延伸体异常增暖对东亚夏季风影响的数值试验[J].热带气象学报,2011,27(4):569-576,8.基金项目
国家重点基础研究发展计划项目(2007CB411805) （2007CB411805）
周家自然科学基金项目(40675065)共同资助 （40675065）
