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[1]Zhao Jincai,Pan Tao.Spatiotemporal Variation of Multiple Time-Scale NPP and Its Response to Climate Change in the Yellow River Basin[J].Research of Soil and Water Conservation,2024,31(04):214-222,232.[doi:10.13869/j.cnki.rswc.2024.04.008]

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Spatiotemporal Variation of Multiple Time-Scale NPP and Its Response to Climate Change in the Yellow River Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 04 Page number: 214-222,232 Column: Public date: 2024-06-30

Title:: Spatiotemporal Variation of Multiple Time-Scale NPP and Its Response to Climate Change in the Yellow River Basin

Author(s):: Zhao Jincai^1,2, Pan Tao³; (1.School of Business, Henan Normal University, Xinxiang, Henan 453007, China; 2.Research Institute for Rural Revitalization and Common Prosperity, Henan Normal University, Xinxiang, Henan 453007, China; 3.Scientific Academy of Natural Resources of Henan Province, Zhengzhou 450003, China)

Keywords:: NPP; multiple time-scale analysis; driving factors; Yellow River Basin

CLC:: Q948.112

DOI:: 10.13869/j.cnki.rswc.2024.04.008

Abstract:: [Objective]The aims of this study are to characterize the changes in net primary productivity(NPP)at different time scales, and to reveal the impact of climate factors on vegetation NPP in Yellow River Basin. [Method]The NPP was estimated month by month using the CASA model from 2000 to 2020 based on remote sensing data and meteorological data, and the trend analysis and partial correlation analysis were used to investigate the temporal and spatial variations of NPP and its response to climate factors at annual and seasonal scales. [Results]The annual NPP in the Yellow River Basin showed significant upward trend with a rate of 1.68 g/(m²·a)from 2000 to 2020, and the NPP in the middle reaches was the highest and grew fastest. The summer NPP was the highest and had the fastest growth rate, especially in the middle reaches. Annual NPP was affected by precipitation most widely, accounting for 31.95% of the total area, and precipitation had a longer lag period than temperature and sunshine duration. The relationships between precipitation and NPP in summer and autumn were mainly positive, with a ratio of more than 70%. About 75% of area showed that temperature and sunshine duration positively influenced NPP in winter. [Conclusion]Vegetation NPP in the Yellow River Basin presented obvious spatial heterogeneity and seasonal variation, and the influence of climate factors on vegetation NPP had different lag periods. Therefore, vegetation protection and restoration in the Yellow River Basin should be considered from both spatial and temporal aspects.

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Last Update: 2024-06-30