越来越多的雪旱威胁着加拿大的供水
Robert Sarpong1, Ali Nazemi1, Amir AghaKouchak2,3
1Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, QC Canada.
概括
我们开发了雪水可用性来测量积雪中的水. 2000年至2019年期间,加拿大和阿拉斯加的总积雪水量增加,但局部损失威胁到数百万人的水资源.
科学领域:
- 水文学的水文学
- 环境科学 环境科学
- 气候科学 气候科学
背景情况:
- 雪水是寒冷地区供水的关键资源.
- 现有的方法缺乏全面量化雪水储存的方法.
研究的目的:
- 介绍和量化加拿大和阿拉斯加的雪水可用性 (SWA).
- 分析2000-2019年SWA的趋势和空间变化.
主要方法:
- 集成的网格数据集用于雪的深度,密度和覆盖率.
- 在25 × 25 km2分辨率下开发了四个SWA估计.
- 分析了SWA.的长期平均值和十年变化.
主要成果:
- 年长期平均SWA为996 ± 170公里3 (2000-2019).
- 从2000-2009年到2010-2019年,SWA显著增加 (799至1208公里3).
- 显著的SWA损失发生在该域的3%左右,主要在北美山脉 Cordillera.
结论:
- 尽管总体增加,但局部SWA损失对加拿大西部的供水构成威胁.
- 这些损失,加上加拿大南部的减少,影响了人口约86%居住的地区.
- SWA是理解和管理雪地占主导地位的地区的水资源的重要指标.
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