根据IRRMIP结果,灌扩张对湿热应激的影响
Yi Yao1, Agnès Ducharne2, Benjamin I Cook3
1Department of Water and Climate, Vrije Universiteit Brussel, Brussels, Belgium. yi.yao@vub.be.
Nature communications
|January 26, 2025
概括
灌扩张减少了空气温度的极端热量,但由于湿度较高,增加了湿热应激. 这表明灌不是有效适应气候变化下人类升级的热应激.
科学领域:
- 气候科学 气候科学
- 环境科学 环境科学
- 水文学的水文学
背景情况:
- 20世纪的灌扩张通过水,能量和生物地球化学循环显著改变了气候.
- 以前的灌对气候影响的评估受限于单一地球系统模型的依赖,引入了结构性不确定性.
研究的目的:
- 用多个地球系统模型量化灌扩张对气候的历史影响.
- 评估灌作为应对日益严重的人类热应激的适应策略的有效性.
主要方法:
- 在灌模型相互比较项目 (IRRMIP) 中,对六个地球系统模型的模拟结果进行分析.
- 灌水的取水量化及其对2米空气温度和极端热量的影响.
- 评价灌对湿热应激指标的影响.
主要成果:
- 灌的扩张导致了水的提取增加,并在大量灌的地区显著减少了2米的空气温度极端热量.
- 灌对热应激的冷却效应因空气湿度增加而减少或逆转,这取决于所使用的指标.
- 观察到,在灌地区,当地居民暴露于湿热压力的增加.
结论:
- 灌扩张不是一个有效的适应措施,以缓解气候变化下的不断升级的人类热应激.
- 需要仔细考虑当地居民在灌地区受到湿热压力的增加.
- 该研究强调了灌对区域和全球气候模式的复杂,多方面的影响.
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