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近50年辽宁省干旱综合指数的动态变化

刘晓梅1;李晶1;吕志红2;刘明3;邢婉茹3   

  1. 1沈阳区域气候中心, 沈阳 110016;2抚顺市气象局, 抚顺 113000;3辽宁省信息与技术保障中心, 沈阳 110016
  • 收稿日期:2008-08-25 修回日期:1900-01-01 出版日期:2009-05-10 发布日期:2009-05-10

Dynamic changes of composite drought indiex in Liaoning Province in recent 50 years.

LIU Xiao-mei1;LI Jing1;Lü Zhi-hong2;LIU Ming3;XING Wan-ru3   

  1. 1Shenyang Regional Climate Center, Shenyang 110016, China;2Fushun Meteorological Bureau, Fushun 113000, Liaoning, China;3Liaoning Meteorological Information and Technological Support Center, Shenyang 110016, China
  • Received:2008-08-25 Revised:1900-01-01 Online:2009-05-10 Published:2009-05-10

摘要: 选取辽宁省37个观测站的日降水量和日平均气温,利用干旱综合指数方法计算了1958—2007年的每日干旱综合指数值(CI)。依此指数对辽宁省干旱过程进行诊断,在此基础上分析辽宁省气候干旱的时空变化特征。结果表明:辽宁省各地都有干旱发生,西部是干旱多发区;各地区均是5、6月干旱发生频率最高,西部秋季干旱发生频率也很高;辽宁省年干旱日数、生长季干旱日数均存在增加趋势。

关键词: 土壤有机碳, 植物过程, 生态系统

Abstract: By using the daily precipitation and daily mean air temperature data from 37 observation stations in Liaoning Province, the daily composite drought index (CI) in 1958〖KG-*2〗-〖KG-*7〗2007 was calculated. Based on this calculation, the drought process in the Province was diagnosed, and its spatiotemporal variations were analyzed. The results showed that in the Province, drought event occurred everywhere, and its frequency was most great in west part. The drought frequency was greater in May and June in whole Liaoning, and also, greater in autumn in west Liaoning. The drought days both in a year and in the growth season were increasing.

Key words: Soil organic carbon, Plant process, Ecosystem