气候变化和人类活动对新疆草原生长的定量影响,中国
Hanyi Rui1, Beier Luo2, Ying Wang3
1Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, China.
Frontiers in plant science
|February 6, 2025
概括
气候变化和人类活动同样影响新疆.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
背景情况:
- 新疆的草原对于碳循环至关重要.
- 气候变化和人类活动极大地影响了草原的动态.
- 量化这些因素对草原变化的贡献需要进一步的研究.
研究的目的:
- 通过使用正常化差异植被指数 (NDVI) 来分析新疆草原从1982年到2015年的空间趋势变化.
- 探索NDVI与气候因素 (温度,降水,蒸汽压力缺陷) 之间的相关性.
- 确定气候变化和人类活动对新疆草原变化的相对贡献.
主要方法:
- 利用遥感数据 (NDVI) 来评估草原变化.
- 分析了NDVI的空间趋势和跨年变化.
- 与关键气候变量和探索的归因模型相关联的NDVI.
主要成果:
- 在新疆62.5%地区观察到总体上升的NDVI趋势,与变暖和加湿有关.
- 在NDVI趋势中显著的空间异质性,在某些地区增加,在其他地区减少 (例如伊利河流域).
- 气候变化 (52%) 和人类活动 (48%) 对草原生长的贡献几乎相等;人类活动主导了草原减少,特别是在山区/平原地区 (64.29%).
结论:
- 新疆的气候变化,以变暖和降水增加为特征,一般促进了草原的生长.
- 虽然气候变化是一个重要的驱动因素,但人类活动起着至关重要的作用,特别是在草原退化方面.
- 了解气候和人类因素之间的相互作用对于新疆有效的草原管理至关重要.
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