2004—2005年宁夏特大干旱事件的诊断分析  

Diagnosis Analysis on Extremely Drought Events in Ningxia during 2004-2005

作　　者：杨淑萍[1] 赵光平[2] 孙银川[1] 马力文[1] 苏占胜[1] 穆建华[1] 

机构地区：[1]宁夏气象防灾减灾重点实验室,宁夏银川750002 [2]中国气象局兰州干旱气象研究所,甘肃兰州730020

出　　处：《中国沙漠》2006年第6期948-952,共5页Journal of Desert Research

基　　金：国家自然科学基金项目(40575048);科技部项目"宁夏气候对全球气候变化的响应及其机制"(2004DIB3J121);宁夏回族自治区科技攻关计划项目"我区天气异常与突变规律的诊断及监测预警技术"联合资助

摘　　要：通过对2004年9月至2005年11月宁夏全区24个站连续15个月气温和降水资料进行分析,对干旱事件的气候特征、干旱环流特征以及造成干旱的成因进行初步诊断,其结果表明:宁夏2004—2005年特大干旱事件是在全球气候变暖的条件下发生的,贝加尔湖阻高以及500 hPa正高度距平持续维持是造成宁夏特大干旱事件发生的根本原因;同时,西太平洋副高与常年相比较弱也是其重要原因之一。We have analyzed the climate characters, atmospheric circulation characters and the causes of drought events in Ningxia based on the temperature and precipitation data of 24 observation stations in continuously 15 months from September 2004 to November 2005. The results showed that the extremely drought events in Ningxia during 2004-2005 occurred under the background of global warming, and the Baikal Blocking High and the persistence of 500 hPa Positive Height Anomaly were the main causes. Meanwhile, the feeble Pacific Subtropical High compared with the normal was also an important cause of drought event.

关 键 词：干旱事件 环流异常 诊断分析 宁夏 

分 类 号：P448[天文地球—大气科学及气象学]