摘要
利用河北省及周边73个台站1961—2009年冬季降水资料、NCEP／NCAR再分析资料、NOAA太平洋海温等资料，应用奇异谱分解（SVD）等多种统计方法研究了河北冬季降水异常特征及其与环流和太平洋海表温度异常（SSTA）的关系。结果表明：河北冬季降水有一定的年代际变化和周期性，从10a以下尺度看，冬季降水存在8～10和2～3a的变化周期；冬季东亚地区500hPa高度场从低纬到中高纬呈正、负、正的东亚一太平洋（EAP）遥相关型时，河北降水偏多，最明显的区域主要位于沧州和承德的东部；当北太平洋海温场为PDO正位相，赤道中太平洋SSTA为E1Nino型时，河北省冬季多雨，邢台、邯郸及沧州一带表现更明显。
Using winter precipitation data from 73 meteorological stations in Hebei Province during 1961-- 2009, NCEP/NCAR reanalysis data and NOAA SST data of the Pacific Ocean during the same period, fea- tures of precipitation anomalies in Hebei Province in winter and their relations with the atmospheric circu- lation and SSTA of the Pacific Ocean are analyzed with the Singular Value Decomposition （SVD） analysis method, and other statistical methods. The results indicate that winter precipitation in Hebei has the char- acteristics of interdecadal and periodic variations. In the scale within a decade, 8-to-10-year or 2-to-3-year periodic changes in winter have been found in the recent 49 years. When the 500 hPa height field over East Asia in winter shows the positive, negative and positive East Asia--Pacific （EAP） teleconnection pattern from low to high latitudes, Hebei receives more precipitation than normal and the most remarkable areas are in Cangzhou and the eastern part of Chengde. When the distribution pattern of SST of the North Pacif- ic shows PDO positive phase and the central equatorial Pacific distribution of SSTA appears to be the pat-tern of E1 Nifio, the winter precipitation in Hebei becomes even more especially in Xingtai, Handan and Cangzhou.
出处
《气象》
CSCD
北大核心
2013年第9期1197-1203,共7页
Meteorological Monthly
基金
公益性行业(气象)科研专项(GYHY200906016)
河北省气象局科研项目(11ky27)共同资助
关键词
降水异常
空间型态
500
hPa高度场
太平洋海温异常
冬季
precipitation anomaly, spatial pattern, 500 hPa height field, SSTA of the Pacific Ocean, winter
