Mon Oct 13, F. Flechtner
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Gao, Chunchun, Lu, Yang, Zhang, Zizhan, and Shi, Hongling, 2019. A Joint Inversion Estimate of Antarctic Ice Sheet Mass Balance Using Multi-Geodetic Data Sets. Remote Sensing, 11(6):653, doi:10.3390/rs11060653.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2019RemS...11..653G,
author = {{Gao}, Chunchun and {Lu}, Yang and {Zhang}, Zizhan and {Shi}, Hongling},
title = "{A Joint Inversion Estimate of Antarctic Ice Sheet Mass Balance Using Multi-Geodetic Data Sets}",
journal = {Remote Sensing},
keywords = {Antarctic ice sheet, mass balance, glacial isostatic adjustment (GIA), joint inversion estimate, Gravity Recovery and Climate Experiment (GRACE), Ice, Cloud and land Elevation Satellite (ICESat), Global Positioning System (GPS)},
year = 2019,
month = mar,
volume = {11},
number = {6},
eid = {653},
pages = {653},
abstract = "{Many recent mass balance estimates using the Gravity Recovery and
Climate Experiment (GRACE) and satellite altimetry (including
two kinds of sensors of radar and laser) show that the ice mass
of the Antarctic ice sheet (AIS) is in overall decline. However,
there are still large differences among previously published
estimates of the total mass change, even in the same observed
periods. The considerable error sources mainly arise from the
forward models (e.g., glacial isostatic adjustment [GIA] and
firn compaction) that may be uncertain but indispensable to
simulate some processes not directly measured or obtained by
these observations. To minimize the use of these forward models,
we estimate the mass change of ice sheet and present-day GIA
using multi-geodetic observations, including GRACE and Ice,
Cloud and land Elevation Satellite (ICESat), as well as Global
Positioning System (GPS), by an improved method of joint
inversion estimate (JIE), which enables us to solve
simultaneously for the Antarctic GIA and ice mass trends. The
GIA uplift rates generated from our JIE method show a good
agreement with the elastic-corrected GPS uplift rates, and the
total GIA-induced mass change estimate for the AIS is 54
{\ensuremath{\pm}} 27 Gt/yr, which is in line with many recent
GPS calibrated GIA estimates. Our GIA result displays the
presence of significant uplift rates in the Amundsen Sea
Embayment of West Antarctica, where strong uplift has been
observed by GPS. Over the period February 2003 to October 2009,
the entire AIS changed in mass by -84 {\ensuremath{\pm}} 31
Gt/yr (West Antarctica: -69 {\ensuremath{\pm}} 24, East
Antarctica: 12 {\ensuremath{\pm}} 16 and the Antarctic
Peninsula: -27 {\ensuremath{\pm}} 8), greater than the GRACE-
only estimates obtained from three Mascon solutions (CSR: -50
{\ensuremath{\pm}} 30, JPL: -71 {\ensuremath{\pm}} 30, and GSFC:
-51 {\ensuremath{\pm}} 33 Gt/yr) for the same period. This may
imply that single GRACE data tend to underestimate ice mass loss
due to the signal leakage and attenuation errors of ice
discharge are often worse than that of surface mass balance over
the AIS.}",
doi = {10.3390/rs11060653},
adsurl = {https://ui.adsabs.harvard.edu/abs/2019RemS...11..653G},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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