High-Resolution Terrestrial Water Storage Estimates From GRACE and Land Surface Models

Jae Seung Kim, Ki Weon Seo, Byeong Hoon Kim, Dongryeol Ryu, Jianli Chen, Clark Wilson

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Terrestrial Water Storage (TWS) changes have been estimated at basin to continental scales from gravity variations using data from the Gravity Recovery and Climate Experiment (GRACE) satellites since 2002. The relatively low spatial resolution (∼300 km) of GRACE observations has been a main limitation in such studies. Various data processing strategies, including mascons, forward modeling, and constrained linear deconvolution (CLD), have been employed to address this limitation. Here we develop a revised CLD method to obtain a TWS estimate that combines GRACE observations with much higher spatial resolution land surface models. The revised CLD constrains model estimates to agree with GRACE TWS when smoothed. As an example, we apply the method to obtain a high spatial resolution TWS estimate in Australia. We assess the accuracy of the approach using synthetic GRACE data.

Original languageEnglish
Article numbere2023WR035483
JournalWater Resources Research
Volume60
Issue number2
DOIs
Publication statusPublished - Feb 2024

Keywords

  • GRACE
  • high-resolution TWS
  • land surface model
  • terrestrial water storage

ASJC Scopus subject areas

  • Water Science and Technology

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