| The Influence of Vegetation Cover on Summer Precipitation in China： a Statistical Analysis of NDVI and Climate Data |
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| 作者姓名： | ZHANG Jingyong DONG Wenjie FU Congbin WU Lingyun |
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| 作者单位： | [1]GlobalChangeSystemforAnalysis,ResearchandTraining,RegionalCenterforTemperateEastAsia,InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beijing100029 [2]NationalClimateCenter,Beijing100081 |
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| 基金项目： | 国家自然科学基金，中国科学院资助项目，国家重点基础研究发展计划(973计划) |
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| 摘 要： | This study provides new evidence for the feedback effects of vegetation cover on summer precipitation in different regions of China by calculating immediate (same season), and one-and two-season lagged correlations between the normalized difference vegetation index (NDVI) and summer precipitation. The results show that the correlation coefficients between NDVI in spring and the previous winter and precipitation in summer are positive in most regions of China, and they show significant difference between regions. The stronger one-and two-season lagged correlations occur in the eastern arid/semi-arid region, Central China,and Southwest China out of the eight climatic regions of China, and this implies that vegetation cover change has more sensitive feedback effects on summer precipitation in the three regions. The three regions are defined as sensitive regions. Spatial analyses of correlations between spring NDVI averaged over each sensitive region and summer precipitation of 160 stations suggest that the vegetation cover strongly affects summer precipitation not only over the sensitive region itself but also over other regions, especially the downstream region.
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| 关 键 词： | 中国 夏季降水 植被覆盖 气象数据 规范植被区域索引 NDVI |
| 收稿时间： | 18 February 2010 |
The influence of vegetation cover on summer precipitation in China: A statistical analysis of NDVI and climate data |
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| ZHANG Jingyong,DONG Wenjie,FU Congbin,WU Lingyun.The influence of vegetation cover on summer precipitation in China: A statistical analysis of NDVI and climate data[J].Advances in Atmospheric Sciences,2003,20(6):1002-1006. |
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| Authors: | Jingyong Zhang Wenjie Dong Congbin Fu Lingyun Wu |
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| Institution: | Global Change System for Analysis, Research and Training, Regional Center for Temperate East Asia,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,National Climate Center, Beijing 100081,Global Change System for Analysis, Research and Training, Regional Center for Temperate East Asia,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Global Change System for Analysis, Research and Training, Regional Center for Temperate East Asia,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | This study provides new evidence for the feedback effects of vegetation cover on summer precipitation in different regions of China by calculating immediate (same season), and one-and two-season lagged correlations between the normalized difference vegetation index (NDVI) and summer precipitation. The results show that the correlation coefficients between NDVI in spring and the previous winter and precipitation in summer are positive in most regions of China, and they show significant difference between regions. The stronger one-and two-season lagged correlations occur in the eastern arid/semi-arid region, Central China,and Southwest China out of the eight climatic regions of China, and this implies that vegetation cover change has more sensitive feedback effects on summer precipitation in the three regions. The three regions are defined as sensitive regions. Spatial analyses of correlations between spring NDVI averaged over each sensitive region and summer precipitation of 160 stations suggest that the vegetation cover strongly affects summer precipitation not only over the sensitive region itself but also over other regions, especially the downstream region. |
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| Keywords: | influence vegetation cover summer precipitation |
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