毛乌素沙地植被NDVI时空变化特征及其驱动因子分析OA
Analysis of Spatio-Temporal Variation Characteristics and Driving Forces of Vegetation NDVI in the Mu Us Sandy Land
本研究基于MODIS数据和气象数据,采用Theil-Sen趋势分析、Mann-Kendall趋势检验和Hurst指数等方法研究了毛乌素沙地植被NDVI时空变化特征及其驱动力分析.结果表明,毛乌素沙地整体年均NDVI总体呈现波动上升趋势,其增长速率为0.007·a-1,空间分布呈现自西北向东南逐渐增大的趋势,未来毛乌素沙地NDVI主要以反向特征为主,占比为71.66％.NDVI与降水量和平均气温的相关性均呈现正相关性.降水量是影响毛乌素沙地植被生长的驱动因子.
To understand the current status of vegetation ecology,analyze the influencing factors of vegetation changes,and provide a scientific basis for regional ecological environment management and planning,this study investigated the spatial-temporal variation characteristics and driving forces of Normalized Difference Vegetation Index(NDVI)in the Mu Us Sandy Land using MODIS data and meteorological data,employing methods such as Theil-Sen trend analysis,Mann-Kendall trend test,and Hurst exponent.The results showed that the overall annual average NDVI in the Mu Us Sandy Land exhibited a fluctuating upward trend with a growth rate of 0.007/a.The spatial distribu-tion displayed a gradual increase from northwest to southeast.In the future,the NDVI in the Mu Us Sandy Land is predicted to mainly exhibit an inverse trend,accounting for 71.66％of the area.Both NDVI and precipitation and average temperature exhibited positive correlations.The vegetation in the Mu Us Sandy Land tends to improve,yet there is a potential for future degradation.Precipitation is i-dentified as the dominant factor influencing vegetation growth in the Mu Us Sandy Land.
王蕾
陕西省林业调查规划院,西安 710082
生物学
毛乌素沙地植被NDVI时空变化气象因素
Mu Us sandy landvegetation NDVItemporal and spatial variationsmeteorological factors
《陕西林业科技》 2024 (004)
1-5 / 5
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