Vegetation greenness trend (2000 to 2009) and the climate controls in the Qinghai-Tibetan Plateau
Vegetation greenness trend (2000 to 2009) and the climate controls in the Qinghai-Tibetan Plateau
复制标题
青藏高原植被绿化趋势（2000-2009年）与气候调控
DOI：
10.1117/1.jrs.7.073572
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发表时间：
2013-01
影响因子：
1.7
通讯作者：
Li Jing
中科院分区：
文献类型：
--
作者：
Wang Cuizhen;Yan Dongmei;Li BIn;Li Jing
摘要青藏高原正经历着明显的变暖趋势，气候变暖对高寒草地生态系统产生了直接而迅速的影响。利用2000 - 2009年的中分辨率成像光谱仪数据，对青藏高原草地的绿度变化趋势进行了研究。气象站数据被用来探索植被绿度变化的气候驱动因素。结果表明，整个区域的平均归一化植被指数（NDVI）以0.036的速率增加 yr − 1 .主要位于东北高原的约20%的植被面积表现出显著的NDVI增加趋势（p值< 0.05）。只有4%的植被面积有明显的减少趋势，主要集中在中部和西南部高原。植被指数与降水量之间存在较强的正相关关系，尤其是在东北高原，降水量是草地植被指数的有利因子。植被指数与温度呈负相关，尤其是在南部高原，表明较高的温度对草地生长有不利影响。虽然气候变暖预计将有利于寒冷地区的植被生长，但高原中部和西南部的草地表现出减少的趋势，受气温升高和降水减少的影响。
Abstract The Qinghai-Tibetan Plateau has been experiencing a distinct warming trend, and climate warming has a direct and quick impact on the alpine grassland ecosystem. We detected the greenness trend of the grasslands in the plateau using Moderate Resolution Imaging Spectroradiometer data from 2000 to 2009. Weather station data were used to explore the climatic drivers for vegetation greenness variations. The results demonstrated that the region-wide averaged normalized difference vegetation index (NDVI) increased at a rate of 0.036 yr − 1 . Approximately 20% of the vegetation areas, which were primarily located in the northeastern plateau, exhibited significant NDVI increase trend ( p -value < 0.05 ). Only 4% of the vegetated area showed significant decrease trends, which were mostly in the central and southwestern plateau. A strong positive relationship between NDVI and precipitation, especially in the northeastern plateau, suggested that precipitation was a favorable factor for the grassland NDVI. Negative correlations between NDVI and temperature, especially in the southern plateau, indicated that higher temperature adversely affected the grassland growth. Although a warming climate was expected to be beneficial to the vegetation growth in cold regions, the grasslands in the central and southwestern plateau showed a decrease in trends influenced by increased temperature coupled with decreased precipitation.
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影响因子：
6.1
作者：
E. Zavaleta;M. Shaw;N. Chiariello;Brian D. Thomas;E. Cleland;C. Field;H. Mooney
通讯作者：
E. Zavaleta;M. Shaw;N. Chiariello;Brian D. Thomas;E. Cleland;C. Field;H. Mooney
影响因子：
3.4
作者：
S. S. Young-S.-;R. Harris
通讯作者：
S. S. Young-S.-;R. Harris
影响因子：
4.9
作者：
Qin Dahe;Liu Shiyin;Li Peiji
通讯作者：
Li Peiji
冬春季变暖导致青藏高原春季物候延迟
DOI：
10.1073/pnas.1012490107
发表时间：
2010-11
影响因子：
11.1
作者：
Haiying Yu;Eike Luedeling;Jianchu Xu
通讯作者：
Jianchu Xu
影响因子：
2.7
作者：
Yang Yuan
通讯作者：
Yang Yuan