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投稿时间：2005-04-07 修订日期：2005-11-07
投稿时间：2005-04-07 修订日期：2005-11-07
中文摘要: 利用2003年4月15～18日甘南迭部重大森林火灾资料以及2002年5月～2003年4月气象资料,分析了火灾的天气气候成因,同时利用相应的EOS/MO-DIS遥感资料分析了前期土壤湿度以及着火状况。结果表明:冬、春季气温偏高、降水偏少,持续数月干旱是甘肃南部发生重大火灾的主要气候背景。西北区东部过渡季节干旱少雨的500hPa平均环流特征是欧亚大陆东岸大槽偏深、新疆脊偏强。北方冷空气底部锋区南压,青藏高原上偏南气流发展是甘肃南部火灾环流形势之一。气温持续上升、湿度持续下降是火灾发生、蔓延的重要条件。通过研究
中文关键词: 森林大火，气象条件，EOS遥感监测
Abstract:Based on the fatal forest fire data from 15 to 18 April 2003 in Diebu, meteorological data and EOS/MODIS data from May 2002 to April 2003,the Meteorological Conditions of the fire are analyzed.The result shows that higher air temperature and fewer precipitation in winter and spring,and long-term drought are the primary climate background of the fatal forest fire in the south of Gansu.The characteristics of 500hPa mean circulation of drought are as follow. There is a strong ridge at Xinjiang and a deep trough at the eastern coast of Eurasia. Cold front moved to south of Gansu and southerly wind developing is one of circulation features of fire in the south of Gansu. Continual increase of air temperature and continual decrease of humidity are the important conditions to fire happen and extend.It shows that the soil humidity can be reflected by EOS/MODIS,which is the most effective means to detect the happening of the fire, estimate the fire area of the fire.
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引用文本：
许东蓓,梁芸,蒲肃,黄玉霞,王有生,2006.迭部“4.15”森林大火的气象条件及EOS遥感监测[J].气象,32(1):107-112.
,2006.Meteorological Condition and EOS Telemetry of “4.15” Diebu Forest Fire[J].Meteor Mon,32(1):107-112.
许东蓓,梁芸,蒲肃,黄玉霞,王有生,2006.迭部“4.15”森林大火的气象条件及EOS遥感监测[J].气象,32(1):107-112.
,2006.Meteorological Condition and EOS Telemetry of “4.15” Diebu Forest Fire[J].Meteor Mon,32(1):107-112.