摘要
利用1960—2006年近47年重庆34个测站、西南地区96个国家级基本站的汛期(6~8月)降水量以及美国NCEP/NCAR和欧洲ECMWF的全球再分析资料,研究了重庆汛期降水与南半球大气环流异常的关系。结果表明,南半球中高纬度(40°~60°S)1~5月的环流异常与当年重庆汛期降水有显著关系。在此基础上定义了一个用于诊断重庆汛期降水异常的前期因子,该因子与汛期降水量有显著的负相关关系,当其偏高时,重庆汛期降水偏少;反之,降水偏多。
Using the flood period（June^August） precipitation data of 34 stations in Chongqing and 96 stations in Southwest China and two kinds of the monthly mean reanalysis data of NCEP/NCAR from 1960 to 2006 and ECMWF from 1958 to 2001,the relationship between flood period precipitation in Chongqing and circulation anomaly in Southern Hemisphere is studied.The results show that there is significant relationship between circulation anomaly from January to May at high latitude in Southern Hemisphere（40°~60°S） and the flood period precipitation in Chongqing.On the basis of them the preceding factor which can diagnose the flood period precipitation anomaly in Chongqing to be defined.The negative correlation between the preceding factor and flood period precipitation is noticeable.When the preceding factor is high,the flood period precipitation in Chongqing is less;conversely,the preceding factor is low,the precipitation is more.
出处
《高原气象》
CSCD
北大核心
2011年第1期174-181,共8页
Plateau Meteorology
基金
中国气象局气象新科技推广项目(CMATG2010M26)
重庆市气象局业务重点建设项目"重庆短期气候预测业务软件系统"共同资助
关键词
重庆汛期降水
南半球环流异常
前期因子
Flood period precipitation in Chongqing
Circulation anomaly in Southern Hemisphere
Preceding factor
