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北部中高度地区的过剩水资源在气候变化下连续从海洋迁移

Yansong Guan^1,2, Xihui Gu^1,2, Lunche Wang^1,2

¹State Key Laboratory of Geomicrobiology and Environmental Changes, China University of Geosciences, Wuhan, China.

Science advances

|August 13, 2025

概括

海洋湿度过剩直接迁移到陆地,称为海洋到陆地可用水过剩 (OWAS),正在北方地区增加. 预计气候变化将进一步增强这些OWAS,可能会加剧干旱和暴雨事件.

科学领域:

气候学气候学气候学
水文学的水文学
大气科学大气科学

背景情况:

陆地水的可用性对生计,经济和生态系统至关重要.
海洋水分直接连续迁移到陆地和气候变化的影响仍然不太清楚.
海洋湿度会影响陆地水气极端,但路径尚不清楚.

研究的目的:

识别和描述海洋到陆地可用水过剩 (OWAS).
调查气候变化对OWAS迁移和强度的影响.
评估与强化OWAS相关的未来风险.

主要方法:

利用一个连贯的特征追踪方法来识别OWAS.
分析了大气淡水过剩的时空连续迁移模式 (降水减去蒸发转化).
检查了以往的数据和以往的情况下未来的预测.

主要成果:

发现OWAS从海洋迁移到陆地.
在北方中高度地区 (NMHL),OWAS的持续性,范围和强度与仅在陆地发生的事件相比增加了.
陆地向上的OWAS迁移与大西洋远程连接和太平洋循环转移有关.
预计这些海洋水分传输机制将随着未来的变暖而加强.

结论:

OWAS是一个显著的现象,特别是在NMHL.
预计由于大气变暖,气候变化将增强OWAS的特点.
加剧的OWAS带来了双重风险:潜在的干旱缓解和增加的雨水洪水.
了解OWAS动态对于预测未来的气候极端情况至关重要.

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