Detailed quantification of glacier elevation and mass changes in South Georgia
Most glaciers in South America and on the Antarctic Peninsula are retreating and thinning. They are considered strong contributors to global sea level rise. However, there is a lack of glacier mass balance studies in other areas of the Southern Hemisphere, such as the surrounding Antarctic Islands....
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ftnerc:oai:nora.nerc.ac.uk:526564 2023-05-15T13:41:44+02:00 Detailed quantification of glacier elevation and mass changes in South Georgia Farias-Barahona, David Sommer, Christian Sauter, Tobias Bannister, Daniel Seehaus, Thorsten C. Malz, Philipp Casassa, Gino Mayewski, Paul A. Turton, Jenny A. Braun, Matthias H. 2020-03 text http://nora.nerc.ac.uk/id/eprint/526564/ https://nora.nerc.ac.uk/id/eprint/526564/1/Farias-Barahona_2020_Detailed.pdf https://iopscience.iop.org/article/10.1088/1748-9326/ab6b32/pdf en eng IOP Publishing Ltd https://nora.nerc.ac.uk/id/eprint/526564/1/Farias-Barahona_2020_Detailed.pdf Farias-Barahona, David; Sommer, Christian; Sauter, Tobias; Bannister, Daniel orcid:0000-0002-2982-3751 Seehaus, Thorsten C.; Malz, Philipp; Casassa, Gino; Mayewski, Paul A.; Turton, Jenny A.; Braun, Matthias H. 2020 Detailed quantification of glacier elevation and mass changes in South Georgia. Environmental Research Letters, 15 (3), 034036. https://doi.org/10.1088/1748-9326/ab6b32 <https://doi.org/10.1088/1748-9326/ab6b32> cc_by CC-BY Publication - Article PeerReviewed 2020 ftnerc https://doi.org/10.1088/1748-9326/ab6b32 2023-02-04T19:50:02Z Most glaciers in South America and on the Antarctic Peninsula are retreating and thinning. They are considered strong contributors to global sea level rise. However, there is a lack of glacier mass balance studies in other areas of the Southern Hemisphere, such as the surrounding Antarctic Islands. Here, we present a detailed quantification of the 21st century glacier elevation and mass changes for the entire South Georgia Island using bi-static synthetic aperture radar interferometry between 2000 and 2013. The results suggest a significant mass loss since the beginning of the present century. We calculate an average glacier mass balance of -1.04 0.09 m w.e.a(-1) and a mass loss rate of 2.28 0.19 Gt a(-1) (2000-2013), contributing 0.006 0.001 mm a(-1) to sea-level rise. Additionally, we calculate a subaqueous mass loss of 0.77 0.04 Gt a(-1) (2003-2016), with an area change at the marine and lake-terminating glacier fronts of -6.58 0.33 km(2) a(-1), corresponding to similar to 4% of the total glacier area. Overall, we observe negative mass balance rates in South Georgia, with the highest thinning and retreat rates at the large outlet glaciers located at the north-east coast. Although the spaceborne remote sensing dataset analysed in this research is a key contribution to better understanding of the glacier changes in South Georgia, more detailed field measurements, glacier dynamics studies or further long-term analysis with high-resolution regional climate models are required to precisely identify the forcing factors. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula South Georgia Island Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula South Georgia Island ENVELOPE(-36.750,-36.750,-54.250,-54.250) Environmental Research Letters 15 3 034036 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Most glaciers in South America and on the Antarctic Peninsula are retreating and thinning. They are considered strong contributors to global sea level rise. However, there is a lack of glacier mass balance studies in other areas of the Southern Hemisphere, such as the surrounding Antarctic Islands. Here, we present a detailed quantification of the 21st century glacier elevation and mass changes for the entire South Georgia Island using bi-static synthetic aperture radar interferometry between 2000 and 2013. The results suggest a significant mass loss since the beginning of the present century. We calculate an average glacier mass balance of -1.04 0.09 m w.e.a(-1) and a mass loss rate of 2.28 0.19 Gt a(-1) (2000-2013), contributing 0.006 0.001 mm a(-1) to sea-level rise. Additionally, we calculate a subaqueous mass loss of 0.77 0.04 Gt a(-1) (2003-2016), with an area change at the marine and lake-terminating glacier fronts of -6.58 0.33 km(2) a(-1), corresponding to similar to 4% of the total glacier area. Overall, we observe negative mass balance rates in South Georgia, with the highest thinning and retreat rates at the large outlet glaciers located at the north-east coast. Although the spaceborne remote sensing dataset analysed in this research is a key contribution to better understanding of the glacier changes in South Georgia, more detailed field measurements, glacier dynamics studies or further long-term analysis with high-resolution regional climate models are required to precisely identify the forcing factors. |
format |
Article in Journal/Newspaper |
author |
Farias-Barahona, David Sommer, Christian Sauter, Tobias Bannister, Daniel Seehaus, Thorsten C. Malz, Philipp Casassa, Gino Mayewski, Paul A. Turton, Jenny A. Braun, Matthias H. |
spellingShingle |
Farias-Barahona, David Sommer, Christian Sauter, Tobias Bannister, Daniel Seehaus, Thorsten C. Malz, Philipp Casassa, Gino Mayewski, Paul A. Turton, Jenny A. Braun, Matthias H. Detailed quantification of glacier elevation and mass changes in South Georgia |
author_facet |
Farias-Barahona, David Sommer, Christian Sauter, Tobias Bannister, Daniel Seehaus, Thorsten C. Malz, Philipp Casassa, Gino Mayewski, Paul A. Turton, Jenny A. Braun, Matthias H. |
author_sort |
Farias-Barahona, David |
title |
Detailed quantification of glacier elevation and mass changes in South Georgia |
title_short |
Detailed quantification of glacier elevation and mass changes in South Georgia |
title_full |
Detailed quantification of glacier elevation and mass changes in South Georgia |
title_fullStr |
Detailed quantification of glacier elevation and mass changes in South Georgia |
title_full_unstemmed |
Detailed quantification of glacier elevation and mass changes in South Georgia |
title_sort |
detailed quantification of glacier elevation and mass changes in south georgia |
publisher |
IOP Publishing Ltd |
publishDate |
2020 |
url |
http://nora.nerc.ac.uk/id/eprint/526564/ https://nora.nerc.ac.uk/id/eprint/526564/1/Farias-Barahona_2020_Detailed.pdf https://iopscience.iop.org/article/10.1088/1748-9326/ab6b32/pdf |
long_lat |
ENVELOPE(-36.750,-36.750,-54.250,-54.250) |
geographic |
Antarctic The Antarctic Antarctic Peninsula South Georgia Island |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula South Georgia Island |
genre |
Antarc* Antarctic Antarctic Peninsula South Georgia Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula South Georgia Island |
op_relation |
https://nora.nerc.ac.uk/id/eprint/526564/1/Farias-Barahona_2020_Detailed.pdf Farias-Barahona, David; Sommer, Christian; Sauter, Tobias; Bannister, Daniel orcid:0000-0002-2982-3751 Seehaus, Thorsten C.; Malz, Philipp; Casassa, Gino; Mayewski, Paul A.; Turton, Jenny A.; Braun, Matthias H. 2020 Detailed quantification of glacier elevation and mass changes in South Georgia. Environmental Research Letters, 15 (3), 034036. https://doi.org/10.1088/1748-9326/ab6b32 <https://doi.org/10.1088/1748-9326/ab6b32> |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1088/1748-9326/ab6b32 |
container_title |
Environmental Research Letters |
container_volume |
15 |
container_issue |
3 |
container_start_page |
034036 |
_version_ |
1766156487348977664 |