辽宁省水文干旱与北半球500hPa高度场遥相关分析

Remote Correlation Analysis of Hydrological Drought in Liaoning and the 500hPa Height Field in Northern Hemisphere

为了解辽宁省水文干旱特征,研究辽宁省水文干旱与前期气象要素场的遥相关关系,本文利用1956年~2015年辽宁省44个水文测站的径流量Z指数和前期1月~12月北半球500 hPa高度场,通过奇异值分解(SVD)方法分析了北半球500 hPa高度场对辽宁省水文干旱的影响。结果表明辽宁省西部异常偏旱、东部异常偏涝与前期冬季、春季、夏季、秋季北半球500 hPa高度场之间存在着较为密切的联系。前期气象要素场与水文干旱的耦合分析,可为辽宁省水文干旱的趋势预测初选因子提供依据。

In order to understand the characteristics of hydrological drought in Liaoning Province,and study the remote correlation between hydrological drought in Liaoning Province and the previous meteorological element fields,this paper uses the Z-index of runoff from 44 hydrological stations in Liaoning Province from 1956 to 2015 and the northern hemisphere from January to December At 500 hPa height field,the influence of 500 hPa height field in northern hemisphere on hydrological drought in Liaoning Province was analyzed by singular value decomposition(SVD)method.The results show that there is a close relationship between the abnormal drought in the west of Liaoning Province and the abnormal flood in the east and the 500 hPa height field in the winter,spring,summer,and autumn in the northern hemisphere.The coupling analysis of the previous meteorological factor field and hydrological drought can provide a basis for the preliminary selection of the factors for the prediction of the trend of hydrological drought in Liaoning Province.