Temporal-spatial Characteristics of Forest Fire and Their Linkages with Climates in Xinjiang
Based o correlation and relative importance analysis,we made full use of the officially released forest fire data(1999-2020)and Wildfire Atlas of China(2005-2018)for Xinjiang,summarized their temporal-spatial patterns,analyzed fire-climate relationships,and comprehensively explored their causes.The results were as follows:On the daily scale,80％of the forest fires were found between 13:00 and 17:00.On the monthly scale,most forest fires occurred from March to September(89.62％),with relatively higher burned areas being ob-served from August to September(79.59％).On annual scales,both fire count and burned areas showed a decreas-ing trend since 1999,with the latter decreasing significantly.Spatially,forest fires in Xinjiang were observed at the spatial regions of 80°-88°E,43°-48°N.August-September diurnal temperature range(DTR,raw data:r=0.49,P＜0.05;detrended data:r=0.69,P＜0.05)and maximum temperature(Tmax,raw data:r=0.47,P＜0.05;detrended data:r=0.54,P＜0.05)were found to be the key factors affecting burned areas in Xinjiang.Most forest fires in Xinjiang were caused by humans.The percentage of human-induced forest fires decreased by 13.27％for the periods of 2017-2020(59.76％)compared to that during 1999-2016(71.73％).The results of this study may provide scientific guidelines on forest fire monitoring and alarming in Xinjiang.Specifically,forest fire source management for specific regions should be strengthened when the August-September maximum temperature in Xinjiang is projected to increase.
forest fireXinjiangspatial-temporal characteristicsdiurnal temperature rangemaximum tem-peratureclimatic factor
国家科技期刊平台
NSTL
万方数据
