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秭归县地处鄂西南山区北部边缘的长江沿岸,森林覆盖率仅30.1％,但森林火险时有发生。本文参考有关湖北省森林火险预报研究成果,结合本县实际,找出森林火险逐日等级预报指标群。根据1979～1995年的气象资料和林火资料,分析得知火灾发生的大气环流形势主要有5种:东亚大槽、干冷锋、干暖槽、变性高压、副热带高压。本文结合本站气象要素变化特征,制作上午和下午使用的两套预报指标:
Zigui County is located in the north edge of the mountainous area of southwest Hubei Province along the coast of the Yangtze River, with only 30.1% of the forest coverage, but forest fires occur from time to time. With reference to the research results of forest fire risk prediction in Hubei Province and the actual conditions in this county, this paper finds out the index group of daily forecast of forest fire risk. According to the meteorological data and forest fire information from 1979 to 1995, it is known that there are five main types of atmospheric circulation in the event of a fire: the East Asian trough, the dry-cold front, the dry-warm trough, the high-pressure denatured and the subtropical high. This article combines the changes of the meteorological elements of this site, making two sets of forecast indicators used in the morning and afternoon: