北疆北部地区春季地表湿润状况特征分析  

Analysis on the Characteristics of Surface Humid Index in Spring in North Xinjiang

作　　者：傅玮东[1] 姚艳丽[1] 陈洪武[1] 

机构地区：[1]新疆气候中心,乌鲁木齐830002

出　　处：《中国农业气象》2009年第S2期223-226,共4页Chinese Journal of Agrometeorology

基　　金："十一五"国家科技支撑计划课题"现代农村信息化关键技术研究与示范"(2006BAD10A15);中国气象局新技术推广项目"草地生态气象监测预测业务技术推广应用"(CMATG2008Z02);新疆气象局项目"北疆牧区草地气象监测预测技术研究"(200904)

摘　　要：利用北疆北部地区12个气象站1961-2008年3-5月月平均气温、降水量及相对湿度资料,计算得到春季地表湿润指数,对北疆北部地区48a来春季地表湿润指数年际及年代际变化特征及分布规律进行了较为深入的研究。结果表明:2O世纪6O年代以来,北疆北部地区春季地表有变干趋势;从空间分布上看,呈经向分布,偏西地区春季地表湿润指数大于偏东地区,表明偏东地区春旱重于偏西地区。同时探讨了北疆北部地区春季地表湿润指数与降水量、气温和空气相对湿度的关系以及春季极端干湿事件频率的空间分布。The surface humid index in Spring were calculated with the monthly precipitation and mean temperature and relative humidity data in spring from 1961 to 2008 of 12 meteorological stations in north Xinjiang.According to index,the inter-annual and interdecadal change characteristics of the surface humid index in spring and its distribution rule were analyzed.The results showed that the surface humid index in spring declines slowly since 1960s,its spatial distribution were meridional.The surface humid index in spring in the west area were greater than that of the east area in north Xinjiang,it showed that the spring drought in the east area were more serious than that of the west area in north Xinjiang.Meantime,the relationship between the surface humid index in spring and precipitation and temperature and air relative humidity were discussed and the spatial distribution of the frequency of the extreme dry/wet events in spring were analyzed in this paper.

关 键 词：地表湿润指数 变化特征 极端干湿事件频率 北疆北部 

分 类 号：P468[天文地球—大气科学及气象学]