气候变化背景下云南松林火灾害的响应规律研究

基于1990—2018年云南省云南松分布区气象数据和森林火灾数据,采用Mann-Kendall趋势检验法、对比分析法以及相关性分析研究气象指标与森林火灾的动态变化趋势和响应规律.结果表明:(1)防火期平均气温在1998—2018年达显著上升水平,年均与防火期的平均相对湿度均在1995—2018年达显著下降水平;年均及防...

Response Law of Forest Fire Disasters of Pinus yunnanensis under of Climate Change

Based on Pinus yunnanensis distribution area meteorological data and fire data from 1990 to 2018,the Mann-Kendall trend method,comparative analysis and correlation analysis were used to analyze dynamic change trend of climate and forest fire.The results showed that(1)The average temperature of fire prevention period reached significantly increased from 1998 to 2018.The average relative humidity of annual and fire prevention period significantly decreased from 1995 to 2018,and its wind speed significantly declined from 1995 to 2004,and average wind speed of fire prevention period significantly increased from 2010 to 2018.(2)The annual average temperature and relative humidity,the precipitation and average relative humidity of fire prevention period showed a downward trend,and other meteorological indicators showed an upward trend.(3)The impact intensity of each meteorological indicator on forest fires showed a order of annual average temperature>annual average temperature of fire prevention period>average relative humidity of fire prevention period>annual average relative humidity,all four indicators reached the most significant level(P<0.01).(4)The evaluation scores of fire meteorological indicators showed an overall upward trend.(5)The number of P.yunnanensis fires interannually fluctuated larger in Yunnan,and showed a general downward trend.The number of fires increased from 1989 to 2010,and significantly decreased from 2011 to 2018.