Long-term gravity field changes in Greenland and Antarctica from SLR data
In recent years, monitoring of changes in the Earth’s gravity field has been carried out mainly by the Gravity Recovery And Climate Experiment (GRACE) and its successor GRACE Follow-On. However, very little information is available on the temporal evolution of the Earth's gravity field prior to...
Main Authors: | , , , , |
---|---|
Format: | Conference Object |
Language: | English |
Published: |
2023
|
Subjects: | |
Online Access: | https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017838 |
id |
ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5017838 |
---|---|
record_format |
openpolar |
spelling |
ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5017838 2023-10-29T02:32:26+01:00 Long-term gravity field changes in Greenland and Antarctica from SLR data Gałdyn, F. Sośnica, K. Zajdel, R. Meyer, U. Jäggi, A. 2023 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017838 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-1753 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017838 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-1753 2023-10-01T23:43:19Z In recent years, monitoring of changes in the Earth’s gravity field has been carried out mainly by the Gravity Recovery And Climate Experiment (GRACE) and its successor GRACE Follow-On. However, very little information is available on the temporal evolution of the Earth's gravity field prior to the launch of the GRACE mission and through gaps in GRACE K-band data between 2010 and 2019. Fortunately, GRACE and GRACE Follow-On are not the only missions for the Earth's gravity field recovery. For the mass redistribution characteristics in large scales, we may employ Satellite Laser Ranging (SLR) observations to geodetic satellites. In this study, we derive gravity field changes for Greenland and Antarctica based on SLR data and compare the results to the GRACE, GRACE Follow-On, and Ice sheet Mass Balance Inter-comparison Exercise (IMBIE) data. We propose a set of long-term, continuous solutions, in which the gravity field is expanded up to degree and order 10/10 with a monthly resolution from 1/1995 to 10/2021. We show results from the unconstrained solution, as well as the solution that has been decomposed into normal equations expanded up to degree and order 4, 6, 8, and 10 and stacked, taking advantage of stability and better resolution from lowest and higher-degree expansion. We also propose different types of weighting, degree and order-specific constraining, and different data lengths. The SLR-based solutions are evaluated based on the noise on the oceans and differences to IMBIE and GRACE results for Greenland and Antarctica, which are identified by substantial ice mass loss. Conference Object Antarc* Antarctica Greenland Ice Sheet GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
In recent years, monitoring of changes in the Earth’s gravity field has been carried out mainly by the Gravity Recovery And Climate Experiment (GRACE) and its successor GRACE Follow-On. However, very little information is available on the temporal evolution of the Earth's gravity field prior to the launch of the GRACE mission and through gaps in GRACE K-band data between 2010 and 2019. Fortunately, GRACE and GRACE Follow-On are not the only missions for the Earth's gravity field recovery. For the mass redistribution characteristics in large scales, we may employ Satellite Laser Ranging (SLR) observations to geodetic satellites. In this study, we derive gravity field changes for Greenland and Antarctica based on SLR data and compare the results to the GRACE, GRACE Follow-On, and Ice sheet Mass Balance Inter-comparison Exercise (IMBIE) data. We propose a set of long-term, continuous solutions, in which the gravity field is expanded up to degree and order 10/10 with a monthly resolution from 1/1995 to 10/2021. We show results from the unconstrained solution, as well as the solution that has been decomposed into normal equations expanded up to degree and order 4, 6, 8, and 10 and stacked, taking advantage of stability and better resolution from lowest and higher-degree expansion. We also propose different types of weighting, degree and order-specific constraining, and different data lengths. The SLR-based solutions are evaluated based on the noise on the oceans and differences to IMBIE and GRACE results for Greenland and Antarctica, which are identified by substantial ice mass loss. |
format |
Conference Object |
author |
Gałdyn, F. Sośnica, K. Zajdel, R. Meyer, U. Jäggi, A. |
spellingShingle |
Gałdyn, F. Sośnica, K. Zajdel, R. Meyer, U. Jäggi, A. Long-term gravity field changes in Greenland and Antarctica from SLR data |
author_facet |
Gałdyn, F. Sośnica, K. Zajdel, R. Meyer, U. Jäggi, A. |
author_sort |
Gałdyn, F. |
title |
Long-term gravity field changes in Greenland and Antarctica from SLR data |
title_short |
Long-term gravity field changes in Greenland and Antarctica from SLR data |
title_full |
Long-term gravity field changes in Greenland and Antarctica from SLR data |
title_fullStr |
Long-term gravity field changes in Greenland and Antarctica from SLR data |
title_full_unstemmed |
Long-term gravity field changes in Greenland and Antarctica from SLR data |
title_sort |
long-term gravity field changes in greenland and antarctica from slr data |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017838 |
genre |
Antarc* Antarctica Greenland Ice Sheet |
genre_facet |
Antarc* Antarctica Greenland Ice Sheet |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-1753 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017838 |
op_doi |
https://doi.org/10.57757/IUGG23-1753 |
_version_ |
1781053841059348480 |