2003—2019年内蒙古FIRMS_MODIS植被火点时空变化

Temporal and Spatial Variations of Vegetation Fires in Inner Mongolia From 2003 to 2019 Based on FIRMS_MODIS

基于FIRMS MODIS C6火点数据集,采用重心模型、空间相关性和均值聚类等方法,分析2003—2019年间内蒙古自治区植被火点时空分布格局。结果表明:研究区年际火点数量先增后减,春秋季节为高发期,火点主要集中在3-5月和9-10月。在空间上,火点多分布于低海拔区域,年际火点重心由东北向西南迁移,月火点重心主要分布在东部城市;植被火点空间自相关水平较低;植被火点呈现“春季主导型”“秋季主导型”“无明显特征”3种聚类类型。

Based on the FIRMS MODIS C6 fire point data set,the center of gravity model,spatial correlation,mean clustering and other methods were used to analyze the spatiotemporal distribution pattern of vegetation fire points in Inner Mongolia Autonomous Region from 2003 to 2019.The results showed that:the number of inter-annual fire spots in the study area increased first and then decreased,and the spring and autumn seasons were high incidence periods,and the fire spots were mainly concentrated in March-May and September-October.Spatially,the fire spots are mostly distributed in low-altitude areas,the inter-annual fire spots move from northeast to southwest,and the monthly fire spots are mainly distributed in eastern cities;the spatial autocorrelation level of vegetation fire spots is low;There are three types of clustering:dominant,“autumn dominant”and“no obvious features”.