Antarctic Ice Mass Change Products from GRACE/GRACE-FO Using Tailored Sensitivity Kernels
We derived gravimetric mass change products, i.e., gridded and basin-averaged mass changes, for the Antarctic Ice Sheet (AIS) from time-variable gravity-field solutions acquired by the Gravity Recovery and Climate Experiment (GRACE) mission and its successor GRACE-FO, covering more than 18 years. Fo...
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ftmdpi:oai:mdpi.com:/2072-4292/13/9/1736/ 2023-08-20T04:00:35+02:00 Antarctic Ice Mass Change Products from GRACE/GRACE-FO Using Tailored Sensitivity Kernels Andreas Groh Martin Horwath agris 2021-04-29 application/pdf https://doi.org/10.3390/rs13091736 EN eng Multidisciplinary Digital Publishing Institute Remote Sensing in Geology, Geomorphology and Hydrology https://dx.doi.org/10.3390/rs13091736 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 13; Issue 9; Pages: 1736 Antarctic Ice Sheet mass change GRACE/GRACE-FO sensitivity kernels Text 2021 ftmdpi https://doi.org/10.3390/rs13091736 2023-08-01T01:37:26Z We derived gravimetric mass change products, i.e., gridded and basin-averaged mass changes, for the Antarctic Ice Sheet (AIS) from time-variable gravity-field solutions acquired by the Gravity Recovery and Climate Experiment (GRACE) mission and its successor GRACE-FO, covering more than 18 years. For this purpose, tailored sensitivity kernels (TSKs) were generated for the application in a regional integration approach. The TSKs were inferred in a formal optimization approach minimizing the sum of both propagated mission errors and leakage errors. We accounted for mission errors by means of an empirical error covariance model, while assumptions on signal variances of potential sources of leakage were used to minimize leakage errors. To identify the optimal parameters to be used in the TSK generation, we assessed a set of TSKs by quantifying signal leakage from the processing of synthetic data and by inferring the noise level of the derived basin products. The finally selected TSKs were used to calculate mass change products from GRACE/GRACE-FO Level-2 spherical harmonic solutions covering 2002-04 to 2020-07. These products were compared to external data sets from satellite altimetry and the input–output method. For the period under investigation, the mass balance of the AIS was quantified to be −90.9±43.5 Gt a−1, corresponding to a mean sea-level rise of 0.25±0.12 mm a−1. Text Antarc* Antarctic Ice Sheet MDPI Open Access Publishing Antarctic The Antarctic Remote Sensing 13 9 1736 |
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Open Polar |
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MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Antarctic Ice Sheet mass change GRACE/GRACE-FO sensitivity kernels |
spellingShingle |
Antarctic Ice Sheet mass change GRACE/GRACE-FO sensitivity kernels Andreas Groh Martin Horwath Antarctic Ice Mass Change Products from GRACE/GRACE-FO Using Tailored Sensitivity Kernels |
topic_facet |
Antarctic Ice Sheet mass change GRACE/GRACE-FO sensitivity kernels |
description |
We derived gravimetric mass change products, i.e., gridded and basin-averaged mass changes, for the Antarctic Ice Sheet (AIS) from time-variable gravity-field solutions acquired by the Gravity Recovery and Climate Experiment (GRACE) mission and its successor GRACE-FO, covering more than 18 years. For this purpose, tailored sensitivity kernels (TSKs) were generated for the application in a regional integration approach. The TSKs were inferred in a formal optimization approach minimizing the sum of both propagated mission errors and leakage errors. We accounted for mission errors by means of an empirical error covariance model, while assumptions on signal variances of potential sources of leakage were used to minimize leakage errors. To identify the optimal parameters to be used in the TSK generation, we assessed a set of TSKs by quantifying signal leakage from the processing of synthetic data and by inferring the noise level of the derived basin products. The finally selected TSKs were used to calculate mass change products from GRACE/GRACE-FO Level-2 spherical harmonic solutions covering 2002-04 to 2020-07. These products were compared to external data sets from satellite altimetry and the input–output method. For the period under investigation, the mass balance of the AIS was quantified to be −90.9±43.5 Gt a−1, corresponding to a mean sea-level rise of 0.25±0.12 mm a−1. |
format |
Text |
author |
Andreas Groh Martin Horwath |
author_facet |
Andreas Groh Martin Horwath |
author_sort |
Andreas Groh |
title |
Antarctic Ice Mass Change Products from GRACE/GRACE-FO Using Tailored Sensitivity Kernels |
title_short |
Antarctic Ice Mass Change Products from GRACE/GRACE-FO Using Tailored Sensitivity Kernels |
title_full |
Antarctic Ice Mass Change Products from GRACE/GRACE-FO Using Tailored Sensitivity Kernels |
title_fullStr |
Antarctic Ice Mass Change Products from GRACE/GRACE-FO Using Tailored Sensitivity Kernels |
title_full_unstemmed |
Antarctic Ice Mass Change Products from GRACE/GRACE-FO Using Tailored Sensitivity Kernels |
title_sort |
antarctic ice mass change products from grace/grace-fo using tailored sensitivity kernels |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/rs13091736 |
op_coverage |
agris |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
Remote Sensing; Volume 13; Issue 9; Pages: 1736 |
op_relation |
Remote Sensing in Geology, Geomorphology and Hydrology https://dx.doi.org/10.3390/rs13091736 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs13091736 |
container_title |
Remote Sensing |
container_volume |
13 |
container_issue |
9 |
container_start_page |
1736 |
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1774719066297073664 |