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Geoscience ›› 2024, Vol. 38 ›› Issue (03): 612-623.DOI: 10.19657/j.geoscience.1000-8527.2024.026

• Observation Simulation and Prediction Evaluation of Superbiotic Resources • Previous Articles     Next Articles

Dynamic Evolution of the Vegetation and Its Response to Climate Changes from 1982 to 2020 in the Yellow River Basin (Henan Section)

YAO Ruichen1(), HAO Shilong1(), LI Xiuping1, HOU Jiacheng1, CHEN Haoyuan1, ZHANG Yan2   

  1. 1. School of Surveying, Mapping and Geographic Information, North China University of Water Resources and Hydropower, Zhengzhou, Henan 450046, China
    2. Henan Provincial Water and Soil Conservation Monitoring Station, Zhengzhou, Henan 450002, China
  • Online:2024-06-10 Published:2024-07-05

Abstract:

We constructed the GIMMS-MODIS NDVI dataset of the Yellow River Basin (Henan section) from 1982 to 2020 using a monadic linear regression model with the GIMMS NDVI3g and MODIS NDVI data. In this study, we also investigated the temporal and spatial evolution of NDVI and its response to climate factors in the Henan section of the Yellow River Basin by using Sen trend, Mann-Kendall (M-K) test, and partial correlation analysis. The results show that (1) the reconstructed GIMMS MODIS NDVI and GIMMS NDVI have a better fitting index with the R2 of 0.879,9(P<0.01). The discrepancy of the monthly mean difference between GIMMS MODIS NDVI and GIMMS NDVI is ±0.02, between 81.47%. (2) From 1982 to 2020, the NDVI values in the Yellow River Basin (Henan section) showed an increasing trend in the annual and each season from spring to winter, and the increase rates were 0.001,8 a-1 (P<0.01), 0.002,7 a-1 (P<0.01), 0.000,6 a-1 (P<0.1), 0.001,3 a-1 (P<0.01) and 0.002,4 a-1 (P<0.01), respectively. Spatially, the proportions of proparea with significant increase of NDVI in the interannual and each season were 76.62%, 76.62%, 33.64%, 57.19% and 77.16%, respectively. The area with significant decrease was mainly distributed in the central and southern part of the basin. (3) From 1982 to 2020, the average annual temperature in the Yellow River Basin (Henan Section) showed a significant increasing trend (Trend=0.037,7 ℃·a-1, P<0.01). In terms of seasonal changes, the average temperature in spring and autumn increased at the fastest rate and the precipitation change was not pronounced along the year. (4) The annual, spring and winter NDVI changes in the Yellow River Basin from 1982 to 2020 were mainly controlled by temperature, and the summer NDVI changes were mainly affected by precipitation. In terms of spatial distribution, 82.14%, 50% and 75% of stations showed significant correlations between NDVI and temperature in annual, spring and winter, respectively. Moreover, 3.57%, 14.29% and 3.57% of stations showed significant positive correlations between NDVI and precipitation in spring, summer and autumn, respectively, which mainly are distributed in the central part of the basin.

Key words: Henan section of the Yellow River Basin, NDVI, spatial and temporal evolution, climate change

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