辽宁省旱灾的分布特征及其成因分析  

Distribution Characteristics and Main Causes of Drought in Liaoning Province

作　　者：张淑杰[1] 张玉书[1] 李广霞[2] 戴萍[3] 刘晓梅[3] 赵先丽[1] 

机构地区：[1]中国气象局沈阳大气环境研究所,沈阳110016 [2]沈阳中心气象台,沈阳110016 [3]辽宁省气象信息与技术保障中心,沈阳110016

出　　处：《中国农学通报》2013年第5期199-203,共5页Chinese Agricultural Science Bulletin

基　　金：中国气象局气候变化专项"东北粮食生产格局的气候变化影响与适应"(CCSF-09-13);辽宁省"十二五"科学技术重大项目"主要农业气象灾害发生规律及预警和评估机制研究"(2011210002);中国气象局沈阳大气环境研究所公益性专项"东北粮食基地对气候变化的响应评价及适应对策"(220603022000813)

摘　　要：为了研究辽宁省旱灾分布特征及其形成的主要原因,以便采取相应的对策建议。利用辽宁省1949—2009年的基本气象数据和干旱灾情资料,分析了旱灾发生的主要原因、旱灾的区域和季节分布特征。结果表明,从时间分布上看,旱灾发生的时间相对集中,多发生在春夏季,且连续发生。春旱发生的频率最高,夏旱次之,季节连旱发生的频率最低;从空间分布上看,旱灾成片发生,带状分布明显,区域性较强,辽西旱灾发生次数最多,辽南次之,中部平原区最少。降水量季节分布特征是发生干旱的主要原因。In order to study the distribution characteristics of drought and to explore the fundamental causes of leading to agricultural drought in Liaoning Province and put forward targeted measures for responding drought.Based on the meteorological data and drought data from 1949 to 2009 of Liaoning Province,the main causes and the distribution characteristics of regional and seasonal were analyzed.The results showed that:(1) considering the temporal scale,drought occurred relatively concentrated in spring or summer and sometimes happened continuously from spring to summer.Drought most frequently happened in spring other than in summer,but the possibility of drought which continued from spring to summer was lower than it came out separately in these seasons.(2) In the spatial scale,drought often distributed in whole regions with significant regional characteristics.Drought happened more frequently in western region than in southern region and seldom in the central plain region of Liaoning Province.The main cause of drought was the seasonal distribution characteristics of precipitation.

关 键 词：干旱 分布特征 成因分析 

分 类 号：S1[农业科学—农业基础科学]