Impacts of Climate Change and Human Activities on Vegetation Net Primary Productivity in the Qaidam Basin
In recent years,with the increase of human activities and the change of climate,the vegetation in the Qaidam Basin has been affected to varying degrees.To study the impact of human activities and climate change on vegetation productivity in Qaidam Basin,based on the data from 2000 to 2017,the Miami model was used to simulate the climate impact net primary productivity(NPP).Then the actual NPP of the Qaidam Basin was obtained by downloading MODIS data,and combined with the NPP of climate impact.Finally,the impact of human activities on vegetation productivity and its spatiotemporal changes were calculated.The results show that the overall vegeta-tion productivity in the Qaidam Basin increased by 28.5 g/m2/ya,with a greater increase in the eastern and south-ern parts of the basin.The increase in precipitation promoted vegetation productivity,but there is a phenomenon of higher productivity in the east and lower in the west.Human activities promoted the vegetation productivity in the east of the basin,while decreased in the west.To sum up,the joint action of human activities and climate change improved the vegetation productivity in the eastern and southern parts of the basin,while the less increase in pre-cipitation and human destruction are the reasons for the insignificant increase in vegetation productivity in the cen-tral and northwestern parts of the basin.
万方数据
维普
