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- Title
近20 年若尔盖湿地植被覆盖变化与 气候因子关系研究.
- Authors
张一然; 文小航; 罗斯琼; 李茂善
- Abstract
Based on the Normalized Difference Vegetation Index(NDVI)data of Moderate Resolution Imaging Spectroradiometer(MODIS)satellite MOD13Q1 product provided by NASA,we use the Maximum Value Composite( MVC)and Dimidiate Pixel Model(DPM)to calculate the vegetation coverage of the Zoige wetland vegetation in growing season(from May to September)from 2000 to 2019. By using monthly averaged 2 m temperature, total precipitation,and soil water content data from ERA5 reanalysis data,we use trend analysis and correlation analysis method to study the spatial and temporal distribution and correlation of vegetation coverage of Zoige Wetland and climatic factors,and study the combined influence of temperature,precipitation and soil water content on vegetation coverage and their respective contributions. The results showed that the vegetation coverage of Zoige Wetland during the growing season(May-September)increased slightly in the past 20 years. The 2-meter temperature has a rising trend,especially in the southwestern part of the study area. The total precipitation in the central and southern part of the study area showed a decreasing trend,but it was not obvious. In the northern part of the study area,the precipitation showed a slight increase trend. The soil water content in the northern part of the study area increased significantly,while the southern part became dry. The vegetation coverage has a significant positive correlation with the three climatic factors. The contribution of the climatic factors to the change of vegetation coverage in descending order is 2 m temperature,soil water content and total precipitation.
- Subjects
SPECTRORADIOMETER; UNITED States. National Aeronautics &; Space Administration; GROUND vegetation cover; CLIMATE change; NATIONAL environmental study areas
- Publication
Plateau Meteorology, 2022, Vol 41, Issue 2, p317
- ISSN
1000-0534
- Publication type
Article
- DOI
10.7522/j.issn.1000-0534.2021.00076