南京信息工程大学学报Issue(6)：487-493,7.
河北省旱涝的变化特征及其相关的海气异常型分析
Variability of drought/flood in Hebei province and associated atmospheric and oceanic pattern analysis
摘要
Abstract
Based on 73 meteorological stations�annual precipitation data during 1961-2009 in Hebei province and its vicinity,NCEP/NCAR reanalysis data and NOAA Sea Surface Temperature( SST) data of the Pacific Ocean dur-ing the same period, the spatial and temporal distributions of drought/flood are analyzed. The relations between drought/flood in Hebei and contemporaneous anomalies of the SST field in the Pacific Ocean and the field of circu-lation are investigated by using Singular Value Decomposition ( SVD) and composite analysis methods. The research shows that,there are mainly two patterns in the anomalous distributions of drought/flood in Hebei, with temporal variations in not only inter-annual but also inter-decadal time scale. The coupling relationship between drought/flood in Hebei and associated atmospheric and oceanic anomaly patterns with SVD analysis presents that,when the annual mean SST in equatorial eastern Pacific is abnormally low and the mean SST in the middle of the North Pacific Basin at the same time is abnormally high,it would always have flood in most regions of Hebei province,otherwise it would be a drought year. In drought years of Hebei province the positive anomalies over the southwestern of Lake Baikal and North Pole and the negative anomalies over the south of Aleutian region emerge at 500 hPa mean geopotential height fields. While the circulation anomalies display a latitudinal negative-positive-negative pattern at mid-and high-latitudes in Asia. Concurrent flood years pattern corresponded with the negative anomalies over the southwest-ern of Lake Baikal and North Pole and the positive anomalies over the south of Aleutian region emerge at 500 hPa mean geopotential height fields. At the same time,at mid-and high-latitudes there was latitudinal negative-positive a-nomalous circulation pattern in Asia.关键词
旱涝/太平洋海温/环流场/异常/河北省Key words
drought/flood/SST in the Pacific Ocean/circulation/anomaly/Hebei province分类
机械制造引用本文复制引用
王宏,余锦华,王万筠,高英杰..河北省旱涝的变化特征及其相关的海气异常型分析[J].南京信息工程大学学报,2013,(6):487-493,7.基金项目
公益性行业（气象）科研专项 （）
