GPS-observed elastic deformation due to surface mass balance variability in the Southern Antarctic Peninsula
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...
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Online Access: | https://doi.org/10.1029/2021GL097109 http://ecite.utas.edu.au/148851 |
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ftunivtasecite:oai:ecite.utas.edu.au:148851 2023-05-15T13:59:46+02:00 GPS-observed elastic deformation due to surface mass balance variability in the Southern Antarctic Peninsula Koulali, A Whitehouse, PL Clarke, PJ van den Broeke, MR Nield, GA King, MA Bentley, MJ Wouters, B Wilson, T 2022 application/pdf https://doi.org/10.1029/2021GL097109 http://ecite.utas.edu.au/148851 en eng Amer Geophysical Union http://ecite.utas.edu.au/148851/1/148851 - GPS-observed elastic deformation due to surface mass balance variability in the Southern Antarctic Peninsula.pdf http://dx.doi.org/10.1029/2021GL097109 http://purl.org/au-research/grants/arc/SR200100008 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] http://ecite.utas.edu.au/148851 Earth Sciences Geophysics Geodesy Refereed Article PeerReviewed 2022 ftunivtasecite https://doi.org/10.1029/2021GL097109 2022-03-07T23:16:46Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica eCite UTAS (University of Tasmania) Antarctic Antarctic Peninsula Geophysical Research Letters 49 4 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Geophysics Geodesy |
spellingShingle |
Earth Sciences Geophysics Geodesy Koulali, A Whitehouse, PL Clarke, PJ van den Broeke, MR Nield, GA King, MA Bentley, MJ Wouters, B Wilson, T GPS-observed elastic deformation due to surface mass balance variability in the Southern Antarctic Peninsula |
topic_facet |
Earth Sciences Geophysics Geodesy |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Koulali, A Whitehouse, PL Clarke, PJ van den Broeke, MR Nield, GA King, MA Bentley, MJ Wouters, B Wilson, T |
author_facet |
Koulali, A Whitehouse, PL Clarke, PJ van den Broeke, MR Nield, GA King, MA Bentley, MJ Wouters, B Wilson, T |
author_sort |
Koulali, A |
title |
GPS-observed elastic deformation due to surface mass balance variability in the Southern Antarctic Peninsula |
title_short |
GPS-observed elastic deformation due to surface mass balance variability in the Southern Antarctic Peninsula |
title_full |
GPS-observed elastic deformation due to surface mass balance variability in the Southern Antarctic Peninsula |
title_fullStr |
GPS-observed elastic deformation due to surface mass balance variability in the Southern Antarctic Peninsula |
title_full_unstemmed |
GPS-observed elastic deformation due to surface mass balance variability in the Southern Antarctic Peninsula |
title_sort |
gps-observed elastic deformation due to surface mass balance variability in the southern antarctic peninsula |
publisher |
Amer Geophysical Union |
publishDate |
2022 |
url |
https://doi.org/10.1029/2021GL097109 http://ecite.utas.edu.au/148851 |
geographic |
Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_relation |
http://ecite.utas.edu.au/148851/1/148851 - GPS-observed elastic deformation due to surface mass balance variability in the Southern Antarctic Peninsula.pdf http://dx.doi.org/10.1029/2021GL097109 http://purl.org/au-research/grants/arc/SR200100008 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] http://ecite.utas.edu.au/148851 |
op_doi |
https://doi.org/10.1029/2021GL097109 |
container_title |
Geophysical Research Letters |
container_volume |
49 |
container_issue |
4 |
_version_ |
1766268579539320832 |