Thu Dec 12, F.Flechtner
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Lenczuk, Artur, Olivera-Guerra, Luis, Klos, Anna, and Bogusz, Janusz, 2024. On the ability to study regional hydrometeorological changes using GPS and GRACE measurements. Progress in Earth and Planetary Science, 11(1):63, doi:10.1186/s40645-024-00665-4.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2024PEPS...11...63L,
author = {{Lenczuk}, Artur and {Olivera-Guerra}, Luis and {Klos}, Anna and {Bogusz}, Janusz},
title = "{On the ability to study regional hydrometeorological changes using GPS and GRACE measurements}",
journal = {Progress in Earth and Planetary Science},
keywords = {GPS, GRACE, Drought, Hydrometeorological events, Climate index, K{\"o}ppen{\textendash}Geiger climate zones},
year = 2024,
month = dec,
volume = {11},
number = {1},
eid = {63},
pages = {63},
abstract = "{Recently, an ongoing rise in temperature for both land and ocean areas
is recorded resulting from the Earth's warming climate. As a
result, droughts we observe are getting more frequent, longer
and more severe, exerting sustained impacts on humans,
ecosystems leading to famine, poverty, mass migration, or
agricultural and economic losses. The changes in climate are
successfully monitored by analyzing Total Water Storage (TWS).
For years, TWS has been successfully determined using geodetic
techniques, such as gravity field variations observed by the
Gravity Recovery and Climate Experiment (GRACE) missions or
station position changes monitored by the Global Positioning
System (GPS). As well, geodetic-derived data can be applied
successfully to study of hydrometeorological events. To quantify
droughts characteristics at different temporal and spatial
scales, we recalculate the vertical displacements to Drought
Severity Indices (DSI). We find that DSI based on GPS and GRACE
are positively correlated at over 80\% of stations around the
world, highlighting both Americas and Europe as the most
correlated areas. To validate results, we compare DSI based on
GPS/GRACE with the Global Land Water Storage (GLWS) hydrological
model, the traditional climate indices, and temperature
anomalies. We show that GPS-DSIs are strongly temporally
consistent with both the Standardized Precipitation Index (SPI)
and the Soil Moisture Index (SMI) climate indices at 85\% of
stations, indicating weakly correlated areas at mid-latitudes.
We further show a high potential of geodetic data to assess
drought characteristics within climate zones as well as global
studies. We note that moderate conditions dominate for all
climate zones, for which dry moderate conditions are observed
for 40\% of the months analyzed. As a result, we note warning
conditions at least 52\% of global stations with extreme drying
DSI trends above a value of 2{\textendash}3 per year. We note
that the global water changes are dominated by 9 month droughts
at over 72\% of stations, indicating the average drought
duration around 12, 14, and 15 months for GPS-, GRACE-, and
GLWS-DSI, respectively. The obtained results from geodetic
measurements more reliably characterize the type and phase of
drought, as well as how these droughts cascade into freshwater,
enabling appropriate mitigation strategies.}",
doi = {10.1186/s40645-024-00665-4},
adsurl = {https://ui.adsabs.harvard.edu/abs/2024PEPS...11...63L},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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