[中国西南地区植被对陆地储水的反应]
Xi-Yao Wang1, Deng-Feng Wei1, Hong-Hai Kuang1
1School of Geographical Sciences, Southwest University, Chongqing 400715, China.
Ying yong sheng tai xue bao = The journal of applied ecology
|October 28, 2023
概括
从2003年到2021年,中国西南地区的植被增长 (NDVI) 一般增加. 然而,对陆地储水异常 (TWSA) 的反应因地区而异,西藏的负相关性和东南地区的积极相关性.
科学领域:
- 地球科学 地球科学 地球科学
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
背景情况:
- 陆地储水 (TWS) 对植被健康至关重要.
- 了解TWS植被动态对于区域水资源管理和生态保护至关重要.
- 中国西南部面临着复杂的水文变化,影响了植被覆盖.
研究的目的:
- 调查中国西南部的植被生长趋势和陆地储水异常 (TWSA).
- 分析植被 (NDVI) 和TWSA之间的空间关系.
- 为了确定植被对储水变化的反应的区域差异.
主要方法:
- 利用重力恢复和气候实验 (GRACE) 卫星数据用于TWSA分析 (2003-2021年).
- 使用正常化差异植被指数 (NDVI) 数据来评估植被生长趋势.
- 应用Pearson相关性分析来确定NDVI和TWSA之间的关系.
主要成果:
- 从2003年到2021年,NDVI在中国西南地区呈现出整体上升趋势.
- 在西藏中部和南部,TWSA呈现显著下降趋势,西藏西北部和中国西南部东南部呈现上升趋势.
- 观察到显著的空间异质性:在西藏的大部分地区,NDVI与TWSA有负相关性,但在中国西南东南部是正相关的.
结论:
- 中国西南地区的植被增长普遍在增加.
- 植被对陆地储水变化的反应在空间上有所差异,在西藏和中国西南的不同模式.
- 气候变化和地形是影响这些多样化的植被-TWSA关系的关键驱动因素.
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