全球植被生产率对陆地表面风速变化的显著敏感性
Haohao Wu1, Congsheng Fu2, Lingling Zhang3
1Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China.
Nature communications
|October 21, 2025
概括
陆地原始生产总值 (GPP) 受风速下降的负面影响,从而降低了口腔导电性. 这种风速下降是GPP趋势的一个重要因素,特别是对于草原.
科学领域:
- 生态生态学 生态生态学
- 气候科学 气候科学
- 生物地质化学生物地质化学
背景情况:
- 陆地表面风速的十年变化已被记录,但它们对生态系统生产力的影响尚不清楚.
- 了解风速变化与陆地初级生产总量 (GPP) 之间的联系机制对于预测碳动态至关重要.
研究的目的:
- 系统地探索风速变化对陆地GPP的影响.
- 量化风速下降对GPP趋势的贡献,并预测未来的影响.
主要方法:
- 利用卫星数据,重新分析数据集,流量塔观测和CMIP6模型.
- 进行了探索性模拟实验,以分析GPP对风速变化的敏感性.
- 研究了不同植物功能类型和时间段 (1983-2100) 的影响.
主要成果:
- 陆地GPP对风速变化表现出负敏感性,其值从-156.67到-65.82 g C m−2 yr−1 (m s−1)−1.1.
- 风速的下降主要通过通过大气和土壤干燥度的下降来降低口腔导电性来影响GPP.
- 风速下降是二氧化碳排放量增加后的第二个最重要的因素,从1983年到2010年 (6.0%-7.8%),预计将继续显著.
结论:
- 风速的变化对百年级的全球碳动态有重大影响.
- 在当前和未来的气候条件下,草原受风引起的GPP变化的影响最大.
- 未来风速下降将继续影响GPP趋势,突出显示这一因素对生态系统生产力的重要性.
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