Mon Oct 13, F. Flechtner
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Kracheletz, Magdalena, Liu, Ziyu, Springer, Anne, Kusche, Jürgen, and Friederichs, Petra, 2025. Would the 2021 Western Europe Flood Event Be Visible in Satellite Gravimetry?. Journal of Geophysical Research (Atmospheres), 130(3):2024JD042190, doi:10.1029/2024JD042190.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025JGRD..13042190K,
author = {{Kracheletz}, Magdalena and {Liu}, Ziyu and {Springer}, Anne and {Kusche}, J{\"u}rgen and {Friederichs}, Petra},
title = "{Would the 2021 Western Europe Flood Event Be Visible in Satellite Gravimetry?}",
journal = {Journal of Geophysical Research (Atmospheres)},
year = 2025,
month = feb,
volume = {130},
number = {3},
pages = {2024JD042190},
abstract = "{The primary objective of the GRACE Follow-On satellite mission is to
measure temporal changes in the Earth's gravitational field.
Distance variations between the two GRACE-FO satellites,
recorded by a K-Band Ranging system and a new Laser Ranging
Interferometer (LRI), are significantly influenced by
atmospheric mass redistribution. We investigate whether the sub-
monthly variations in atmospheric water mass, precipitation, and
changes in total water storage during the extreme flood event in
western Europe in 2021 were sufficiently large to influence the
satellite gravity field measurements, if the GRACE-FO satellites
would have passed directly over the region. We use several data
sets such as weather forecasts (ICON-D2 model), hydrological
simulations (ParFlow/CLM), observations as well as reanalyses,
showing the high uncertainty between different estimations of
the considered variables: total precipitable water, total
precipitation, and total water storage. Our estimates suggest a
potentially noticeable impact of the 2021 flood event on the
GRACE-FO satellites. Although it was globally seen a rather
small event, even the atmospheric water mass beyond water vapor,
which is not considered within the de-aliasing process, is close
to the LRI detection accuracy. This is particularly relevant for
future gravity missions, which will use the LRI with potentially
higher sensitivity as their main instrument. Sub-monthly
variations in the total atmospheric water mass, that is, beyond
water vapor of huge extreme precipitation events should be
investigated further to reduce potential future aliasing errors.}",
doi = {10.1029/2024JD042190},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025JGRD..13042190K},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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Mon Oct 13, F. Flechtner