4.7 Article

Spatial and Temporal Differences in Alpine Meadow, Alpine Steppe and All Vegetation of the Qinghai-Tibetan Plateau and Their Responses to Climate Change

期刊

REMOTE SENSING
卷 13, 期 4, 页码 -

出版社

MDPI
DOI: 10.3390/rs13040669

关键词

NDVI; alpine meadow; alpine steppe; spatial-temporal differences; climate change; Qinghai-Tibetan Plateau

资金

  1. Second Tibetan Plateau Scientific Expedition and Research Program [2019QZKK0305]
  2. Strategic Priority Research Program of the Chinese Academy of Sciences [XDA20100101]
  3. National Natural Science Foundation of China [41771233]

向作者/读者索取更多资源

The study reveals significant differences in alpine meadow, alpine steppe, and overall vegetation of the Qinghai-Tibet Plateau in terms of growing season length, NDVI growth trends, vegetation improvement, and degradation. The responses to climatic factors exhibit significant spatial heterogeneity across the plateau.
Alpine meadow and alpine steppe are the two most widely distributed nonzonal vegetation types in the Qinghai-Tibet Plateau. In the context of global climate change, the differences in spatial-temporal variation trends and their responses to climate change are discussed. It is of great significance to reveal the response of the Qinghai-Tibet Plateau to global climate change and the construction of ecological security barriers. This study takes alpine meadow, alpine steppe and the overall vegetation of the Qinghai-Tibet Plateau as the research objects. The normalized difference vegetation index (NDVI) data and meteorological data were used as the data sources between 2000 and 2018. By using the mean value method, threshold method, trend analysis method and correlation analysis method, the spatial and temporal variation trends in the alpine meadow, alpine steppe and the overall vegetation of the Qinghai-Tibet Plateau were compared and analyzed, and their differences in the responses to climate change were discussed. The results showed the following: (1) The growing season length of alpine meadow was 145 similar to 289 d, while that of alpine steppe and the overall vegetation of the Qinghai-Tibet Plateau was 161 similar to 273 d, and their growing season lengths were significantly shorter than that of alpine meadow. (2) The annual variation trends of the growing season NDVI for the alpine meadow, alpine steppe and the overall vegetation of the Qinghai-Tibet Plateau increased obviously, but their fluctuation range and change rate were significantly different. (3) The overall vegetation improvement in the Qinghai-Tibet Plateau was primarily dominated by alpine steppe and alpine meadow, while the degradation was primarily dominated by alpine meadow. (4) The responses between the growing season NDVI and climatic factors in the alpine meadow, alpine steppe and the overall vegetation of the Qinghai-Tibet Plateau had great spatial heterogeneity in the Qinghai-Tibet Plateau. These findings provide evidence towards understanding the characteristics of the different vegetation types in the Qinghai-Tibet Plateau and their spatial differences in response to climate change.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据