Mapping geodetically inferred Antarctic ice height changes into thickness variations: A sensitivity study
Determining recent ice volume changes from satellite measurements of ice height requires an estimate of contemporaneous vertical crustal deformation. This estimate must consider two main sources of crustal deformation: (1) ongoing glacial isostatic adjustment (GIA), that is, the deformational, gravi...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5020948 2023-07-30T03:58:46+02:00 Mapping geodetically inferred Antarctic ice height changes into thickness variations: A sensitivity study Valencic, N. Pan, L. Latychev, K. Mitrovica, J. 2023-07-11 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020948 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-4536 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020948 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-4536 2023-07-16T23:40:28Z Determining recent ice volume changes from satellite measurements of ice height requires an estimate of contemporaneous vertical crustal deformation. This estimate must consider two main sources of crustal deformation: (1) ongoing glacial isostatic adjustment (GIA), that is, the deformational, gravitational and rotational response to late Pleistocene and Holocene ice and ocean mass changes; and (2) modern ice mass flux. The former has generally involved the adoption of global models of GIA defined by some preferred combination of ice history and mantle viscoelastic structure, while the latter has commonly been based on a simple, spatially invariant scaling of measurements of ice height. In the case of the Antarctic Ice Sheet, a scaling by ~1.02 has typically been adopted. We quantify the uncertainty and potential bias introduced in past estimates of the GIA signal using forward modeling results of various complexity. We also use modeling results to emphasize the spatially variable structure of the mapping between ice height changes and vertical crustal deformation associated with modern ice mass flux. Conference Object Antarc* Antarctic Ice Sheet GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Antarctic The Antarctic |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
Determining recent ice volume changes from satellite measurements of ice height requires an estimate of contemporaneous vertical crustal deformation. This estimate must consider two main sources of crustal deformation: (1) ongoing glacial isostatic adjustment (GIA), that is, the deformational, gravitational and rotational response to late Pleistocene and Holocene ice and ocean mass changes; and (2) modern ice mass flux. The former has generally involved the adoption of global models of GIA defined by some preferred combination of ice history and mantle viscoelastic structure, while the latter has commonly been based on a simple, spatially invariant scaling of measurements of ice height. In the case of the Antarctic Ice Sheet, a scaling by ~1.02 has typically been adopted. We quantify the uncertainty and potential bias introduced in past estimates of the GIA signal using forward modeling results of various complexity. We also use modeling results to emphasize the spatially variable structure of the mapping between ice height changes and vertical crustal deformation associated with modern ice mass flux. |
format |
Conference Object |
author |
Valencic, N. Pan, L. Latychev, K. Mitrovica, J. |
spellingShingle |
Valencic, N. Pan, L. Latychev, K. Mitrovica, J. Mapping geodetically inferred Antarctic ice height changes into thickness variations: A sensitivity study |
author_facet |
Valencic, N. Pan, L. Latychev, K. Mitrovica, J. |
author_sort |
Valencic, N. |
title |
Mapping geodetically inferred Antarctic ice height changes into thickness variations: A sensitivity study |
title_short |
Mapping geodetically inferred Antarctic ice height changes into thickness variations: A sensitivity study |
title_full |
Mapping geodetically inferred Antarctic ice height changes into thickness variations: A sensitivity study |
title_fullStr |
Mapping geodetically inferred Antarctic ice height changes into thickness variations: A sensitivity study |
title_full_unstemmed |
Mapping geodetically inferred Antarctic ice height changes into thickness variations: A sensitivity study |
title_sort |
mapping geodetically inferred antarctic ice height changes into thickness variations: a sensitivity study |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020948 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic 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/IUGG23-4536 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020948 |
op_doi |
https://doi.org/10.57757/IUGG23-4536 |
_version_ |
1772809508766089216 |