为明确宁夏 2000 年以来植被生产力时空变化特征及驱动因子,基于 MODIS 植被净初级生产力(NPP)数据MOD17A3HGF,应用Sens斜率、Mann-Kendall趋势检验、Hurst指数分析2000-2020 年宁夏NPP时空变化特征,应用地理探测器探测气象条件、地形地貌、社会经济等10 个因子对宁夏NPP空间分布差异的影响.结果表明:2000-2020 年,宁夏植被净初级生产力空间分布为南北高、中间低,NPP增长速率为52.8 gC·m-2·(10 a)-1,显著增大的区域占全区面积的91.4%.Hurst指数均值为0.447,未来NPP为较弱反持续性,即未来变化与过去变化相反,有弱减小趋势.气象条件是影响宁夏NPP空间分布差异的主要因素,社会经济因子影响力不明显.
Spatial and temporal variations of vegetation net primary productivity and its driving factors in Ningxia from 2000 to 2020
To clarify the spatiotemporal variation characteristics and driving factors of vegetation productivity in Ningxia since 2000,this study utilizes MODIS Net Primary Productivity(NPP)data(MOD17A3HGF),Sen's slope,Mann-Kendall trend test,and Hurst index to investigate the changes in NPP from 2000 to 2020.Employing the geographical detector,the study examines the influence of ten factors including meteorological conditions,to-pography,and socio-economic aspects on the spatial differentiation of vegetation NPP in Ningxia.The results indi-cate that from 2000 to 2020,the spatial distribution of vegetation NPP in Ningxia was high in the north and south and low in the middle,with an NPP growth rate of 52.8 gC·m·(10 a-1),and significant increases observed in 91.4%of the region.The average Hurst index is 0.447,suggesting a weak anti-persistence in future NPP,indica-ting a slight decreasing trend.Meteorological conditions are identified as the primary factor influencing the spatial differentiation of vegetation NPP in Ningxia,while the impact of socio-economic factors is not significant.
国家科技期刊平台
NSTL
万方数据
