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Updated: May 15, 2025

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观测证据表明,下午下雨量增加,在灌区的下风下降

P Greve¹, A U Schmitt², D G Miralles³

¹Climate Service Center Germany (GERICS), Helmholtz-Zentrum Hereon, Hamburg, Germany. peter.greve@hereon.de.

Nature communications

|April 10, 2025

概括

广泛的灌改变了当地降雨量,增加了下午下风降雨量,但减少了大雨量. 这些发现对于气候模型和水资源管理至关重要.

科学领域:

气候科学气候科学
水文学的水文学
农业科学农业科学

背景情况:

灌对于全球粮食安全至关重要,并对水和能源循环产生重大影响.
灌土地的扩张需要了解其气候影响,特别是对当地降雨模式的影响.

研究的目的:

调查大规模灌对当地降水动态的影响.
澄清灌对下风和上风地区降雨发生和强度的影响.

主要方法:

利用了两个全球,高分辨率,次日降水数据集.
分析了与大量灌农业用地相关的降雨模式.

主要成果:

观察到下午的降雨事件在灌区域的下风10公里至50公里内更频繁.
相反,这些灌地区的上风降雨频率较低.
检测到下风下降的下午大雨总量减少,与上风地区相比.

结论:

提供了大规模的观测证据,证明灌对当地降水的影响.
强调需要将这些灌诱导的降雨动态纳入气候和天气预报模型.
为有效的区域水资源管理战略提供了宝贵的见解.

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