热带气象学报2013，Vol.29Issue(2)：281-290,10.DOI:10.3969/j.issn.1004-4965.2013.02.012
南半球海温异常对云南汛期降水异常的影响
IMPACT OF THE SST OF SOUTHERN HEMISPHERE ON FLOOD SEASON PRECIPITATION ANOMALIES IN YUNNAN
摘要
Abstract
Based on the reanalysis data of monthly mean global SST and wind from the NCEP/NCAR and the observation data of flood seasons in 124 stations of Yunnan province from 1961-2006,we applied the analytical methods of correlation analysis and composite analysis and a significance testing method to two sets of samples of average differences in order to investigate into the influence of the southern hemispheric SST on the summer precipitation in Yunnan province from January to May to identify the key time and marine regions.Physical mechanisms are obtained by analyzing the influence of sea-level wind and the key marine regions on the precipitation during Yunnan's raining season.Results showed that there is indeed significant relationship between the southern hemispheric SST and Yunnan's summer precipitation.The key areas for influencing Yunnan's summer precipitation are mainly distributed in the southern hemispheric West Wind Drift,including the Southeast Indian,the southern Australia,the eastern Pacific west coast off Chile,Peru and the southwest Atlantic Magellan.And the most significant sea region is the west coast of Chile and Peru (cold-current areas of the eastern Pacific).Diagnostic analysis results also showed that monsoons in the Bay of Bengal,a cross-equatorial flow in the Indian Ocean near the equator and southwest monsoon in India weaken during the warm phase of the Peru cold current in the eastem Pacific.Otherwise,they strengthen.关键词
气候学/南半球海温/云南/汛期降水异常/关键海区/西风漂流Key words
climatology/ SST of Southern Hemisphere/ Yunnan/ precipitation anomalies during raining season/ key sea area/ West Wind Drift分类
天文与地球科学引用本文复制引用
杨竹云,杨素雨,严华生,张瑾文,古书鸿..南半球海温异常对云南汛期降水异常的影响[J].热带气象学报,2013,29(2):281-290,10.基金项目
国家自然科学基金(41075072) （41075072）
国家自然科学基金(41065004) （41065004）
NSFC-云南联合基金(U0833602) （U0833602）
云南省气象局预报员专项项目(YB201202) （YB201202）
第四届云南大学研究生科研项目(ynuy201154) （ynuy201154）
"十二五"国家科技支撑计划课题"西南突发性灾害应急与防控技术集成与示范"(2012BAD20B06)共同资助 （2012BAD20B06）
