Novel Along‐Track Processing of GRACE Follow‐On Laser Ranging Measurements Found Abrupt Water Storage Increase and Land Subsidence During the 2021 March Australian Flooding

Abstract Following extreme drought during the 2019–2020 bushfire summer, the eastern part of Australia suffered from a week‐long intense rainfall and extensive flooding in March 2021. Understanding how much water storage changes in response to these climate extremes is critical for developing timely...

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Autores principales:	Shin‐Chan Han, In‐Young Yeo, Mehdi Khaki, Christopher M. McCullough, Eunjee Lee, Jeanne Sauber
Formato:	article
Lenguaje:	EN
Publicado:	American Geophysical Union (AGU) 2021
Materias:	GRACE Follow‐On flood GPS Astronomy QB1-991 Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/844599c763f2455b82b4446b733b2587
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spelling	oai:doaj.org-article:844599c763f2455b82b4446b733b25872021-11-23T21:03:08ZNovel Along‐Track Processing of GRACE Follow‐On Laser Ranging Measurements Found Abrupt Water Storage Increase and Land Subsidence During the 2021 March Australian Flooding2333-508410.1029/2021EA001941https://doaj.org/article/844599c763f2455b82b4446b733b25872021-11-01T00:00:00Zhttps://doi.org/10.1029/2021EA001941https://doaj.org/toc/2333-5084Abstract Following extreme drought during the 2019–2020 bushfire summer, the eastern part of Australia suffered from a week‐long intense rainfall and extensive flooding in March 2021. Understanding how much water storage changes in response to these climate extremes is critical for developing timely water management strategies. To quantify prompt water storage changes associated with the 2021 March flooding, we processed the low‐latency (1–3 days), high‐precision intersatellite laser ranging measurements from GRACE Follow‐On spacecraft and determined instantaneous gravity changes along spacecraft orbital passes. Such new data processing detected an abrupt surge of water storage approaching 60–70 trillion liters (km3 of water) over a week in the region, which concurrently caused land subsidence of ∼5 mm measured by a network of ground GPS stations. This was the highest speed of ground water recharge ever recorded in the region over the last two decades. Compared to the condition in February 2020, the amount of recharged water was similar but the recharge speed was much faster in March 2021. While these two events together replenished the region up to ∼80% of the maximum storage over the last two decades, the wet antecedent condition of soils in 2021 was distinctly different from the dry conditions in 2020 and led to generating extensive runoff and flooding in 2021.Shin‐Chan HanIn‐Young YeoMehdi KhakiChristopher M. McCulloughEunjee LeeJeanne SauberAmerican Geophysical Union (AGU)articleGRACE Follow‐OnfloodGPSAstronomyQB1-991GeologyQE1-996.5ENEarth and Space Science, Vol 8, Iss 11, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	GRACE Follow‐On flood GPS Astronomy QB1-991 Geology QE1-996.5
spellingShingle	GRACE Follow‐On flood GPS Astronomy QB1-991 Geology QE1-996.5 Shin‐Chan Han In‐Young Yeo Mehdi Khaki Christopher M. McCullough Eunjee Lee Jeanne Sauber Novel Along‐Track Processing of GRACE Follow‐On Laser Ranging Measurements Found Abrupt Water Storage Increase and Land Subsidence During the 2021 March Australian Flooding
description	Abstract Following extreme drought during the 2019–2020 bushfire summer, the eastern part of Australia suffered from a week‐long intense rainfall and extensive flooding in March 2021. Understanding how much water storage changes in response to these climate extremes is critical for developing timely water management strategies. To quantify prompt water storage changes associated with the 2021 March flooding, we processed the low‐latency (1–3 days), high‐precision intersatellite laser ranging measurements from GRACE Follow‐On spacecraft and determined instantaneous gravity changes along spacecraft orbital passes. Such new data processing detected an abrupt surge of water storage approaching 60–70 trillion liters (km3 of water) over a week in the region, which concurrently caused land subsidence of ∼5 mm measured by a network of ground GPS stations. This was the highest speed of ground water recharge ever recorded in the region over the last two decades. Compared to the condition in February 2020, the amount of recharged water was similar but the recharge speed was much faster in March 2021. While these two events together replenished the region up to ∼80% of the maximum storage over the last two decades, the wet antecedent condition of soils in 2021 was distinctly different from the dry conditions in 2020 and led to generating extensive runoff and flooding in 2021.
format	article
author	Shin‐Chan Han In‐Young Yeo Mehdi Khaki Christopher M. McCullough Eunjee Lee Jeanne Sauber
author_facet	Shin‐Chan Han In‐Young Yeo Mehdi Khaki Christopher M. McCullough Eunjee Lee Jeanne Sauber
author_sort	Shin‐Chan Han
title	Novel Along‐Track Processing of GRACE Follow‐On Laser Ranging Measurements Found Abrupt Water Storage Increase and Land Subsidence During the 2021 March Australian Flooding
title_short	Novel Along‐Track Processing of GRACE Follow‐On Laser Ranging Measurements Found Abrupt Water Storage Increase and Land Subsidence During the 2021 March Australian Flooding
title_full	Novel Along‐Track Processing of GRACE Follow‐On Laser Ranging Measurements Found Abrupt Water Storage Increase and Land Subsidence During the 2021 March Australian Flooding
title_fullStr	Novel Along‐Track Processing of GRACE Follow‐On Laser Ranging Measurements Found Abrupt Water Storage Increase and Land Subsidence During the 2021 March Australian Flooding
title_full_unstemmed	Novel Along‐Track Processing of GRACE Follow‐On Laser Ranging Measurements Found Abrupt Water Storage Increase and Land Subsidence During the 2021 March Australian Flooding
title_sort	novel along‐track processing of grace follow‐on laser ranging measurements found abrupt water storage increase and land subsidence during the 2021 march australian flooding
publisher	American Geophysical Union (AGU)
publishDate	2021
url	https://doaj.org/article/844599c763f2455b82b4446b733b2587
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Novel Along‐Track Processing of GRACE Follow‐On Laser Ranging Measurements Found Abrupt Water Storage Increase and Land Subsidence During the 2021 March Australian Flooding

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