| Relationships between tree-ring width index and NDVI of grassland in Delingha |
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| 作者姓名： | HE Jicheng SHAO Xuemei |
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| 作者单位： | [1]Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China [2]Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China [3]Graduate School of Chinese Academy of Sciences, Beijing 100039, China |
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| 基金项目： | Acknowledgements This work Was supported by the Key Program of the National Natural Science Foundation of China （Grant No. 40331006） and the Key Project of Knowledge Innovation of the Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences （Grant No. CXI0G-E01-05 -02）. |
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| 摘 要： | The responses of terrestrial ecosystem to and their impacts on global climate change are key issues in global change research. More studies on vegetationmonitoring and land cover change have been performed by using remote sensing data recently, which bene…
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| 关 键 词： | 圆柏 祁连山 NDVI 草原 年轮宽度指数 |
| 文章编号： | 10.1007/s11434-006-1106-4 |
| 收稿时间： | 2005-12-20 |
| 修稿时间： | 2005-12-202006-03-03 |
Relationships between tree-ring width index and NDVI of grassland in Delingha |
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| HE Jicheng SHAO Xuemei.Relationships between tree-ring width index and NDVI of grassland in Delingha[J].Chinese Science Bulletin,2006,51(9):1106-1114. |
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| Authors: | Jicheng He Xuemei Shao |
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| Institution: | Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;Graduate School of Chinese Academy of Sciences, Beijing 100039, China;Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China |
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| Abstract: | Using five well-replicated Qilian juniper (Sabina przewalskii Kom.) tree-ring width index se- ries, monthly normalized difference vegetation index (NDVI) of grassland, and climatic data from 1982 to 2001, the relationships between tree-ring width index, NDVI of grassland, and climatic data were analyzed firstly. Then, the relationship between tree-ring width index and NDVI of grassland was explored. The re- sults showed that: (1) Temperature and precipitation in June influenced tree-ring width index and NDVI of grassland deeply in Delingha. (2) There were sig- nificant relationships between five tree-ring width index series (DLH1-DLH5) and monthly NDVI of grassland from June to September, with the most significant relationship being between tree-ring width index series and NDVI of grassland in August. (3) The PC1 (the first principal component derived from DLH1-DLH5 series) exhibited good agreement with monthly NDVI of grassland in the grass growth sea- son (from June to September) and the averaged NDVI in the growth season, which was attributed to their common responses to water-supply limit in Delingha. This study may allow an increase in studying the past dynamics of grassland in Delingha in that the variation of grassland NDVI during the last millennium has been reconstructed from PC1. |
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| Keywords: | Delingha tree-ring width index grassland NDVI |
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