Thu Aug 14, F. Flechtner
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Nicolas, Joëlle, Verdun, Jérôme, Boy, Jean-Paul, Bonhomme, Louis, Asri, Ayoub, Corbeau, Adélie, Berthier, Antoine, Durand, Frédéric, and Clarke, Peter, 2021. Improved Hydrological Loading Models in South America: Analysis of GPS Displacements Using M-SSA. Remote Sensing, 13(9):1605, doi:10.3390/rs13091605.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2021RemS...13.1605N,
author = {{Nicolas}, Jo{\"e}lle and {Verdun}, J{\'e}r{\^o}me and {Boy}, Jean-Paul and {Bonhomme}, Louis and {Asri}, Ayoub and {Corbeau}, Ad{\'e}lie and {Berthier}, Antoine and {Durand}, Fr{\'e}d{\'e}ric and {Clarke}, Peter},
title = "{Improved Hydrological Loading Models in South America: Analysis of GPS Displacements Using M-SSA}",
journal = {Remote Sensing},
keywords = {GPS, environmental loading, Multichannel Singular Spectrum Analysis, South America},
year = 2021,
month = apr,
volume = {13},
number = {9},
eid = {1605},
pages = {1605},
abstract = "{Environmental loading, in particular from continental water storage
changes, induces geodetic station displacements up to several
centimeters for the vertical components. We investigate surface
deformation due to loading processes in South America using a
set of 247 permanent GPS (Global Positioning System) stations
for the 2003-2016 period and compare them to loading estimates
from global circulation models. Unfortunately, some of the
hydrological components, and in particular surface waters, may
be missing in hydrological models. This is especially an issue
in South America where almost half of the seasonal water storage
variations are due to surface water changes, e.g., rivers and
floodplains. We derive river storage variations by rerouting
runoffs of global hydrology models, allowing a better agreement
with the mass variations observed from GRACE (Gravity Recovery
and Climate Experiment) mission. We extract coherent seasonal
GPS displacements using Multichannel Singular Spectrum Analysis
(M-SSA) and show that modeling the river storage induced loading
effects significantly improve the agreement between observed
vertical and horizontal displacements and loading models. Such
an agreement has been markedly achieved in the Amazon basin.
Whilst the initial models only explained half of the amplitude
of GPS, the new ones compensate for these gaps and remain
consistent with GRACE.}",
doi = {10.3390/rs13091605},
adsurl = {https://ui.adsabs.harvard.edu/abs/2021RemS...13.1605N},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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