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在气候变化下,持续的河流热浪正在全球范围内出现.
Yiling Chen1, Zhiying Su1, R Iestyn Woolway2
1Guangdong Provincial Key Laboratory of Urbanization and Geo-Simulation, School of Geography and Planning, Sun Yat-sen University, Guangzhou, China.
Nature communications
|January 6, 2026
概括
由于气候变化,河流热浪将在全球范围内加剧并持续存在. 到2090年代,将近一半的河流可能会经历全年热浪,威胁水生生态系统.
科学领域:
- 环境科学 环境科学
- 气候变化研究 气候变化研究
- 生态生态学 生态生态学
背景情况:
- 河流和水生生物面临极端高温事件的重大威胁.
- 河流热浪被定义为连续的极端高温事件,人们对其了解甚少,尤其是它们在气候变化下的未来演变.
研究的目的:
- 在气候变化场景下调查全球河流热浪的未来强度和持续性.
- 预测加剧的河流热浪对水生生态系统和人类人口的潜在影响.
主要方法:
- 利用气候变化预测,特别是代表性度路径8.5 (高温室气体排放场景).
- 与基线期 (1976-2005) 相比,分析了河流热浪强度和持续时间的变化.
- 评估了全球人口对河流热浪的暴露情况,并确定了脆弱的地区.
主要成果:
- 预计到21世纪末,河流热浪将变得更加强烈 (增加4.2倍) 和持续 (增加95倍).
- 在高排放情景下,到2090年代,全球近50%的河流可能会经历全年热浪.
- 据估计,全球人口暴露于河流热浪的风险每年达到168亿人周,不成比例地影响低收入地区.
结论:
- 持续和强烈的河流热浪对河流生态系统和水生生物构成严重威胁,可能会超过它们的弹性极限.
- 气候变化正在推动河流热浪事件的升级,迫切需要缓解和适应战略.
- 低收入地区的弱势群体因河流热浪暴露的增加而面临不成比例的高负担.
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