Impact of Climate Change and Human Activities on Vegetation NPP Changes in Taihang Mountains
In order to quantitatively differentiate the respective contributions of climate change and human activities to variations in vegetation net primary productivity(NPP)in the Taihang Mountain area,we estimated the NPP dataset for this region from 2000 to 2020 using the CASA model.The impacts of climate change and human activities on NPP changes were rigorously examined through trend analysis,partial correlation analysis,and residual analysis methods.The findings are presented as follows:(1)The NPP of vegetation in the Taihang Mountain area exhibited a positive trend,with a growth rate of 6.13 gC·m-2·a-1.The spatial distribution pattern revealed higher NPP in the southern regions,lower NPP in the northern regions,and variations in the middle.Notably,approximately 92.57％of the regional vegetation displayed an increasing trend in NPP.(2)The average partial correlation coefficients between vegetation NPP and temperature and precipitation were determined to be 0.21 and 0.42,respectively.These findings indicate that precipitation had a more pronounced effect on vegetation NPP compared to temperature.(3)The combined impact of climate change and human activities emerged as the dominant factor influencing vegetation NPP,while the individual contributions of climate change and human activities were relatively minor in proportion.(4)In the improved areas,human activities accounted for 57.65％of the relative contribution to NPP,while climate change contributed 42.35％.Conversely,in the degraded areas,human activities had a higher relative contribution rate of 64.44％,compared to 35.56％attributed to climate change.These findings suggest that human activities exert a greater influence on NPP in the Taihang Mountains than climate change.
NETL
NSTL
万方数据
