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1987年5月6日至6月2日在大兴安岭林区发生了特大森林火灾,损失惨重。本文根据发生火灾前后的天气形势变化,分析研究了发生林火的天气系统。根据地面图,高空图研究冷暖气团的发生发展过程,蒙古气旋是导致大兴安岭林区森林火灾的主要天气系统。大兴安岭林区在暖气团控制下,增温明显,冷峰过后又无降水,产生大风干旱自寺天气形势。这是高火险级天气,极易跑火成灾。因此可根据天气形势的变化,有效的布防力量,以做到有效预防和及时扑救,减少损失。
From May 6, 1987 to June 2, 1987, a huge forest fire broke out in the Greater Xing’an Mountains, causing heavy losses. Based on the changes of the weather before and after the occurrence of the fire, this paper analyzes and studies the weather system of forest fires. According to the ground map and the high-altitude map, the occurrence and development of the cooling and heating air mass were studied. The Mongolian cyclone was the main weather system that caused the forest fire in the Greater Xing’an Mountains. Daxinganling forest under the control of the warm air mass, warming significantly, no precipitation after the cold peak, resulting in strong winds and drought since Temple weather situation. This is a high-fire-class weather, easy to run into a disaster. Therefore, according to the changes in the weather situation, the effective deployment of forces in order to achieve effective prevention and timely suppression, reduce losses.