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全球淡水供应的新趋势

M Rodell1, J S Famiglietti2,3, D N Wiese2

  • 1Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA. Matthew.Rodell@nasa.gov.

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|May 18, 2018
PubMed
概括

全球淡水供应正在发生变化. 卫星数据显示,2002年至2016年的34个陆地储水趋势,由自然变化,地下水使用和气候变化所驱动,影响了水安全.

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科学领域:

  • 地球与环境科学
  • 水文学
  • 气候科学

背景情况:

  • 全球淡水资源因可用性变化而面临越来越大的压力.
  • 了解这些变化的驱动因素对于水资源管理至关重要.
  • 陆地储水 (TWS) 是淡水供应的一个关键指标.

研究的目的:

  • 使用卫星观测量陆地储水 (TWS) 的趋势.
  • 归因于观察到的TWS趋势的驱动因素,包括自然变化,地下水消耗和气候变化.
  • 提供全球水景观对人类影响和气候变化的反应的评估.

主要方法:

  • 使用来自重力恢复和气候实验 (GRACE) 卫星的数据.
  • 分析了2002年至2016年陆地水储量的34个不同趋势.
  • 将TWS变化的驱动因素分类为自然变化,不可持续的地下水消耗,气候变化或它们的组合.

主要成果:

  • 在2002年至2016年间确定和量化了全球陆地水储量的34个重要趋势.
  • 这些趋势的驱动因素包括中国西北部和奥卡万戈三角洲等地区.
  • 观察到的趋势与气候模型预测一致,表明对人类活动和气候变化的反应.

结论:

  • 这项研究提供了基于观察的全球淡水供应变化的评估.
  • 这些发现为评估和预测新出现的水和粮食安全威胁提供了蓝图.
  • 了解TWS趋势及其驱动因素对于可持续的水资源管理和政策制定至关重要.