Thu Dec 12, F.Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Zhong, Bo, Li, Xianpao, Chen, Jianli, Li, Jiancheng, and Xu, Hongyi, 2024. Estimation of Terrestrial Water Storage Changes in Brazil From the Joint Inversion of GRACE-Based Geopotential Difference and GNSS Vertical Displacement Data. Water Resources Research, 60(11):2024WR037538, doi:10.1029/2024WR037538.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2024WRR....6037538Z,
author = {{Zhong}, Bo and {Li}, Xianpao and {Chen}, Jianli and {Li}, Jiancheng and {Xu}, Hongyi},
title = "{Estimation of Terrestrial Water Storage Changes in Brazil From the Joint Inversion of GRACE-Based Geopotential Difference and GNSS Vertical Displacement Data}",
journal = {Water Resources Research},
keywords = {GNSS vertical displacements, GRACE-based geopotential differences, terrestrial water storage changes, joint inversion, Brazil},
year = 2024,
month = nov,
volume = {60},
number = {11},
pages = {2024WR037538},
abstract = "{Gravity Recovery and Climate Experiment (GRACE) satellite gravimetry and
Global Navigation Satellite System (GNSS) surface displacement
measurements offer complementary advantages for monitoring
terrestrial water storage (TWS) changes. We propose a new joint
inversion model based on the combination of GRACE-based
geopotential difference (GPD) observations using the mascon
method and GNSS vertical displacements through the Green's
function method to obtain reliable TWS changes in Brazil. The
performance of the jointly inverted TWS changes is assessed
through closed-loop simulations and comparisons with
hydrometeorological data (precipitation-P, evapotranspiration-
ET, and runoff-R) using water budget closure (P-ET-R) and river
water level observations from satellite altimetry. The
simulation results indicate that the joint inversion results
exhibit higher accuracy and reliability than GRACE GPD-based
mascon (GPD-mascon) and GNSS solutions, and the standard
deviations (STDs) of joint results decrease by
{\ensuremath{\sim}}6.98 and {\ensuremath{\sim}}37.5 mm compared
to those from GPD-mascon and GNSS solutions. The joint inversion
of real GRACE and GNSS data demonstrates notably lower
uncertainty than that of GPD-mascon solutions and exhibits
significant improvement than GNSS-only solutions. The STDs and
correlation coefficients between monthly R time series derived
from three inversion methods (joint inversion, GPD-mascon and
GNSS solutions, combined with P and ET through water budget
closure) and in situ observations are 19.607 mm and 0.912,
20.879 mm and 0.904, and 31.370 mm and 0.778, respectively. The
joint estimates also yield better correlation with river water
level observations compared to GPD-mascon and GNSS solutions.
Furthermore, at the weekly time scale, the joint inversion
results show better consistency with P-ET-R data than those from
GPD-mascon and GNSS solutions.}",
doi = {10.1029/2024WR037538},
adsurl = {https://ui.adsabs.harvard.edu/abs/2024WRR....6037538Z},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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