福建省森林火险等级主要气象影响因子的分布规律

利用福建省67个气象台站1971－2006年的气象资料，结合福建森林火险预报模式确定影响森林火险等级的主要气象因子，按行政区划和森林防火期将气象数据归类，最后利用统计方法进行气象因子的时空分析。结果表明：福建各地区森林火险高等级的气象影响因子不同，最小相对湿度及温度差对北部和西部地区影响较大，蒸发量对西部和东南沿海影响较大，降水量对东南沿海影响较大；各因子的时间分布状态造成1月森林火险等级较高，2月、11月和12月次之，其余防火期相对较低。

Distribution of Key Impact Meteorological Factors for Forest Fire Risk Rating in Fujian

Key meteorological factors impacting forest fire risk rating of Fujian were defined by the model of forest fire risk rating, based on the meteorological data of 67 weather stations from 1971 to 2006. Meteorological data were then classified by administrative division and forest fireproof period, and temporal and spatial contributions of the key meteorological factors were analyzed by statistical method. The results showed that meteorological factors impact on forest fire risk rating of various regions were different. Influence of minimum relative humidity and temperature difference on north and west Fujian, evaporation on west and southeast coast of Fujian, and the precipitation on southeast coast were relatively large. The forest fire risk rating was higher in January, secondly in February, November and December, while lower in other periods due to the temporal distribution of key meteorological factors.