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GPS-observed elastic deformation due to surface mass balance variability in the Southern Antarctic Peninsula
Citation
Koulali, A and Whitehouse, PL and Clarke, PJ and van den Broeke, MR and Nield, GA and King, MA and Bentley, MJ and Wouters, B and Wilson, T, GPS-observed elastic deformation due to surface mass balance variability in the Southern Antarctic Peninsula, Geophysical Research Letters Article e2021GL097109. ISSN 0094-8276 (2022) [Refereed Article]
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Copyright Statement
© 2022. The Authors.This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License, (https://creativecommons.org/licenses/by/4.0/) which permits use, distribution and reproduction in any medium, provided the original work is properly cited
Abstract
In Antarctica, GPS vertical time series exhibit non-linear signals over a wide range of temporal scales. To explain these non-linearities, a number of hypotheses have been proposed, among them the short-term rapid solid Earth response to contemporaneous ice mass change. Here we use GPS vertical time series to reveal the solid Earth response to variations in surface mass balance (SMB) in the Southern Antarctic Peninsula (SAP). At four locations in the SAP we show that interannual variations of SMB anomalies cause measurable elastic deformation. We use regional climate model SMB products to calculate the induced displacement assuming a perfectly elastic Earth. Our results show a reduction of the misfit when fitting a linear trend to GPS time series corrected for the elastic response to SMB variations. Our results imply that, for a better understanding of the glacial isostatic adjustment (GIA) signal in Antarctica, SMB variability must be considered.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Research Division: | Earth Sciences |
| Research Group: | Geophysics |
| Research Field: | Geodesy |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding knowledge |
| Objective Field: | Expanding knowledge in the earth sciences |
| UTAS Author: | King, MA (Professor Matt King) |
| ID Code: | 148851 |
| Year Published: | 2022 |
| Funding Support: | Australian Research Council (SR200100008) |
| Web of Science® Times Cited: | 2 |
| Deposited By: | Geography and Spatial Science |
| Deposited On: | 2022-02-16 |
| Last Modified: | 2022-03-03 |
| Downloads: | 7 View Download Statistics |
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