Study on the correlation between meteorological elements and potential forest fire risk
In order to explore the correlation between complex cli-mate and forest fires in southwest Sichuan,this paper analyses the potential connectivity between various meteorological ele-ments and forest fire occurrence through local-scale meteorologi-cal anomaly changes in Muli County,Liangshan Prefecture,Sich-uan Province,as an example.Then,through FWI and FFDI,the historical fire risk changes in Muli County were analysed to verify the association with forest fires in Muli County.The results showed that there were different cycles of continuous increase(or decay)in barometric pressure,air temperature,humidity,wind speed,and evapotranspiration before and after the occurrence of forest fires.Meanwhile,the forest fire risk indices FWI and FFDI of Muri County showed an interannual oscillation and gradually in-creasing trend,and the annual average correlation coefficient(46.9% )and monthly average correlation coefficient(80.7% )of forest fire frequency with FWI in Muri County were larger than those with FFDI(annual correlation coefficient of 38.7% and monthly correlation coefficient of 53.1% ).In addition,extreme anomalies in forest fire risk values are also closely related to cli-matic events occurring in the same period(or year).Therefore,the persistent high temperature,low humidity and windy meteoro-logical conditions caused by climatic anomalies are one of the es-sential reasons for the rapid increase of forest fire risk level or ma-jor forest fire accidents.
forest fire riskmeteorological elementsFWIfire prevention and control
NETL
NSTL
万方数据
