贵州省2020年植被NDVI变化及其驱动因素分析

Vegetation NDVI Change and Its Driving Factors in Guizhou Province in 2020

探究2020年贵州省逐月植被动态变化及其影响因素,为区域生态环境恢复与治理提供科学依据。基于2020年逐月归一化植被指数(NDVI)数据,辅以同期气象数据、相关分析及滞后性分析等方法,深入解析贵州省植被时空变化特征及其对气候变化响应机制。研究表明:2020年贵州省植被覆盖度良好,且非喀斯特地区高于喀斯特地区,其中喀斯特区域中等覆盖度及以上面积占全省面积的46.78%;贵州省的NDVI与同期降雨量、气温均呈现良好的相关性,而植被生长对气温变化敏感性高于降水变化;2020年贵州省植被变化受气候变化影响较大,植被生长对降水存在滞后效应,滞后时间为1个月。

Exploring the monthly vegetation dynamic change and its influencing factors in Guizhou Province in 2020 is helpful to provide scientific basis for regional ecological environment restoration and management.Based on the monthly normalized difference vegetation index(NDVI)data in 2020,supplemented by meteorological data,correlation analysis and lag analysis,the temporal and spatial characteristics of vegetation change and its response mechanism to climate change in Guizhou Province were deeply analyzed.The results show that in 2020,the vegetation coverage of Guizhou Province is good,and the non-Karst areas are higher than the karst areas,among which the area with moderate coverage or above in the Karst area accounts for 46.78%of the province.NDVI in Guizhou Province showed a good correlation with rainfall and temperature in the same period,and the sensitivity of vegetation growth to temperature change was higher than that of precipitation change.The vegetation change in Guizhou Province in 2020 is greatly affected by climate change,and vegetation growth has a lag effect on precipitation,with a lag time of 1 month.