摘要
利用1948—2004年CPC/NCEP的月平均降水资料、NCEP的850hPa风场和500hPa位势高度场资料,应用EOF方法、小波分析方法、合成法及相关分析法,分析了黄河流域降水主模态的空间分布及其时间变化特征和异常环流特征。利用黄河利津站1950—2002年月平均入海流量资料分析了入海流量和降水关系。基于NOAA的1982—2004年月平均海温资料分析了渤、黄海3月海温和黄河流域7月降水的关系。结果表明:黄河流域降水空间模态主要表现为全流域一致型、南北型、东西型分布,黄河流域降水主要周期为2～4a。黄河利津站入海流量和黄河流域年总降水量、降水第一模态有密切联系。黄河流域降水水汽输送受孟加拉湾水汽输送和西太平洋副热带高压外围风场影响,副高偏西不利于黄河流域降水,巴尔喀什湖附近异常低槽的发展有利于黄河流域的降水。3月份渤、黄海海温可作为考察当年黄河流域降水量的指标。
Based on the CPC/NCEP monthly precipitation data during 1948—2004 and NCEP monthly geopotential height data at 500hPa and wind data at 850hPa,the spatial and temporal patterns of Yellow River Basin precipitation and abnormal circulation is analyzed by using EOF,wavelet analysis,synthesis analysis and correlation analysis.1950—2002 monthly runoff data at Lijin Gauge is used to analyze the relationship between runoff and precipitation.NOAA 1982—2004 monthly sea surface temperature is used to analyze the relationship between precipitation in July and sea surface temperature in March.The result shows that： the spatial pattern is consistency in the whole basin,south-north distribution,east-west distribution,the major cycle of the precipitation is 2~4years.The runoff is closely related to yearly precipitation and the first mode.The water transport in Yellow River basin is affected by southwest airflow from the Bay of Bengal and west pacific high.When the west pacific high locates westerly,it is not propitious to rainfall in Yellow River basin,the development of trough over Balkhash Lake is propitious to rainfall in Yellow River basin.The sea surface temperature of Bohai and Huanghai sea can be a reference for Yellow River precipitation.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第1期1-7,共7页
Periodical of Ocean University of China
基金
国家自然科学基金重点项目(40930844,10735030),国家自然科学基金项目(40676012)资助
关键词
黄河流域
降水时空特征
入海流量
异常环流
Yellow River Basin； spatial and temporal pattern of precipitation； runoff into the sea； abnormal atmospheric circulation；
