【作者】 赁常恭；

【Author】 DIAN CHANGGONG;SATELLITE METEOROLOGY CENTER OF STATE METEOROLOGICAL BUREAU;

【机构】 国家气象局卫星气象中心；

【摘要】 1987年5月我国东北大兴安岭发生一场特大森林火灾,从5月6日一6月2日持续燃烧了28天,大火吞没了87万公顷的森林,烧毁总面积达115万公顷,其中40万公顷为重灾区。本文根据气象卫星图像和定量数字资料分析大兴安岭特大森林火灾特征:火点集中、火势强度大、过火面积大、燃烧时间长。其动态变化主要分三个时段:1)火点开始发展阶段;2)火区扩展逐渐合并阶段;3)火区发展最后阶段。同时用定量数字资料计算过火面积,估算火区蔓延速度和火线、火头分布以及气象卫星火情资料服务效益。更多还原

【Abstract】 An unusual forest conflagration came about in Big Xingan Mountain of our country in May,1987.From May 6 to June 2 the forest fire continued to burn 28 days.The blazing fire devoured 870,000 hectare forest and destroyed total area up to 1,150,000 hectare which includes 40,000 hectare severly afflicted area.This paper analysed characteristics of the unusual big forest conflagration by using images of meteorological satellite and quantitatively numerical data.Those characteristics are:the fire spots were concentrated,the fire momentum was very strong and the buring time was long.Active changes are chiefly divided into three periods:1.The period of fire sources to start to develop;2.The period of fire areas to expand and gradually to merge; 3.The period of fire areas to develop at last.At the same time we calculated the burnt areas and estimated expanding velocity of fire area,distribution of fire-lines and fire-heads.Also we estimated service benefit of firesituation data of meteorological satellite.更多还原