Spatial and Temporal Dynamics of Wildfires in Yunnan Province Based on Remote Sensing Data from 2001 to 2020

Based on the Moderate Resolution Imaging Spectroradiometer(MODIS) thermal anomaly/fire location product data(MCD14DL) from 2001 to 2020, statistical analysis was used to analyze the spatiotemporal dynamic changes of wildfires in Yunnan Province through Mann–Kendall trend test, sliding t-test, kernel density, and spatial autocorrelation. The results showed that there was a significant interannual fluctuation trend in the occurrence of wildfires in Yunnan Province from 2001 to 2020. The frequency of wildfires showed an upward trend from 2001 to 2010 and a downward trend from 2010 to 2020, with the peak of wildfire occurrence occurring in 2010; Wildfire occurrences have significant seasonal differences, with fires mainly concentrated in spring and winter. Spring wildfires have the most ignition points, with the peak occurring in March. Wildfires occur at a spatial scale and exhibit a clustered distribution, mainly concentrated in the southwest and southeast of Yunnan Province. This study conducts an in-depth analysis of the spatiotemporal dynamic patterns of wildfires in Yunnan Province based on satellite fire products, which helps to reveal the mechanisms and risks of wildfire occurrence more deeply, so as to adjust the allocation of fire prevention resources appropriately during the high risk period of wildfire occurrence.