Spatial and Temporal Evolution of NPP and Its Relationship with Temperature and Precipitation in Jilin Province from 2000 to 2020
Ma Yunfei
Gao Zongting
Wu Yujie
Wu Di
Gao Yan
Xu Xiangchi
Abstract：Exploring the spatial and temporal distribution pattern of net primary productivity(NPP)and the response characteristics of climatic factors is very important for the ecological environment protec-tion and carbon source/sink evaluation in Jilin Province under the background of global warming.This paper analyzes the spatio-temporal variation characteristics of NPP in the vegetation growing season in Ji-lin Province from 2000 to 2020 and its correlation with climatic factors pixel by pixel.The results show that,in Jilin Province,vegetation NPP has obvious spatial differentiation,and the overall distribution trend is gradually increasing from the west to the middle to the east.From 2000 to 2020,the NPP has an inter-annual variation trend of fluctuating and rising.The NPP of each ecological function area is that the eastern forest ecological area＞the central farmland ecological area＞the western grassland wetland ecolog-ical area.The Hurst index of vegetation NPP ranges from 0.23 to 0.74,and the future change trend has a strong co-directional continuous feature,with the vegetation growth state being generally positive.The vegetation NPP in Jilin Province has a significant positive spatial autocorrelation,and the distribution of cold and hot spots has a certain degree of polarization.The cold spots are relatively stable,but the hot spots in the eastern part of Jilin have obvious inter-annual changes.The spatial pattern of inter-annual differences in NPP is mainly H-H type and L-L type cluster distribution.In Jilin Province,vegetation NPP is mainly affected by precipitation.The arid area has a significant positive correlation with precipita-tion,and the south to the eastern part is mostly negatively correlated to abundant water resources.The vegetation NPP is weakly correlated to temperature.The correlation analysis after de-trending can elimi-nate the interference other than climatic factors and thus can more truly explore the relationship between NPP and the inter-annual variation of each climate factor.
Keywords：Jilin Provincenet primary productivity(NPP)spatio-temporal variationclimatic factor
Publication Date：2024-12-28
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：10( 65-74 )