Tracking Hurricane‐Induced Water Storage Changes Using GRACE and GRACE‐FO Measurements

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2025-10-14 DOI:10.1029/2025gl116973

Hao‐si Li, Shuang Yi, He Tang

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引用次数: 0

Abstract

Landfalling hurricanes pose significant hydrological risks, yet monitoring their terrestrial water storage (TWS) dynamics remains challenging. Here we employed a new technique that estimates daily regional gravity changes from orbital perturbation measurements of the Gravity Recovery and Climate Experiment and its follow‐on mission to characterize TWS variations during Hurricanes Katrina (2005) and Laura (2020). Our spatiotemporal water storage maps reveal ∼40 Gt of accumulation by Katrina and a coastally localized ∼15 Gt by Laura, with coastal regions retaining up to 80% of precipitation but draining several days faster than inland areas. Despite differing magnitudes, both storms exhibited similar precipitation‐to‐TWS conversion patterns, implying consistent scaling of hydrological responses across intensities. Our observations also indicate that current land surface models, lacking surface inundation modeling, result in underestimations of flood recession rates. This work highlights satellite gravimetry's potential for continuous hurricane‐induced flood monitoring, offering a new tool to alleviate current observational difficulties.

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使用GRACE和GRACE - FO测量跟踪飓风引起的水储存变化

登陆的飓风带来了巨大的水文风险，但监测其陆地储水量（TWS）动态仍然具有挑战性。在这里，我们采用了一种新技术，通过重力恢复和气候实验及其后续任务的轨道扰动测量来估计每日区域重力变化，以表征卡特里娜飓风（2005年）和劳拉飓风（2020年）期间的TWS变化。我们的时空蓄水量图显示，卡特里娜飓风带来的蓄水量为~ 40 Gt，劳拉飓风带来的蓄水量为~ 15 Gt，沿海地区保留了高达80%的降水，但排水速度比内陆地区快几天。尽管强度不同，但两场风暴都表现出相似的降水- TWS转换模式，这意味着不同强度的水文响应具有一致的标度。我们的观测结果还表明，目前的陆地表面模式缺乏地表淹没模拟，导致洪水消退率被低估。这项工作强调了卫星重力测量在持续监测飓风引发的洪水方面的潜力，为缓解当前的观测困难提供了一种新工具。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.