A new Holocene relative sea level curve for the South Shetland Islands, Antarctica
Precise relativesealevel (RSL) data are important for inferring regional ice sheet histories, as well as helping to validate numerical models of ice sheet evolution and glacial isostatic adjustment. Here we develop anew RSL curve for Fildes Peninsula, SouthShetlandIslands (SSIs), a sub-Antarctic arc...
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ftuglasgow:oai:eprints.gla.ac.uk:67303 2023-05-15T13:31:06+02:00 A new Holocene relative sea level curve for the South Shetland Islands, Antarctica Watcham, E. Bentley, M.J. Hodgson, D.A. Roberts, S.J. Fretwell, P.T. Lloyd, J.M. Larter, R.D. Whitehouse, P.L. Leng, M.J. Monien, P. Moreton, S.G. 2011-10 http://eprints.gla.ac.uk/67303/ unknown Watcham, E. et al. (2011) A new Holocene relative sea level curve for the South Shetland Islands, Antarctica. Quaternary Science Reviews <http://eprints.gla.ac.uk/view/journal_volume/Quaternary_Science_Reviews.html>, 30(21-22), pp. 3152-3170. (doi:10.1016/j.quascirev.2011.07.021 <http://dx.doi.org/10.1016/j.quascirev.2011.07.021>) Articles PeerReviewed 2011 ftuglasgow https://doi.org/10.1016/j.quascirev.2011.07.021 2021-09-23T22:45:40Z Precise relativesealevel (RSL) data are important for inferring regional ice sheet histories, as well as helping to validate numerical models of ice sheet evolution and glacial isostatic adjustment. Here we develop anew RSL curve for Fildes Peninsula, SouthShetlandIslands (SSIs), a sub-Antarctic archipelago peripheral to the northern Antarctic Peninsula ice sheet, by integrating sedimentary evidence from isolation basins with geomorphological evidence from raised beaches. This combined approach yields not only aHolocene RSL curve, but also the spatial pattern of how RSL change varied across the archipelago. The curve shows a mid-Holocene RSL highstand on Fildes Peninsula at 15.5 m above mean sealevel between 8000 and 7000 cal a BP. Subsequently RSL gradually fell as a consequence of isostatic uplift in response to regional deglaciation. We propose that isostatic uplift occurred at a non-steady rate, with a temporary pause in ice retreat ca. 7200 cal a BP, leading to a short-lived RSL rise of ∼1 m and forming a second peak to the mid-Holocene highstand. Two independent approaches were taken to constrain the long-term tectonic uplift rate of the SSIs at 0.22–0.48 m/ka, placing the tectonic contribution to the reconstructed RSL highstand between 1.4 and 2.9 m. Finally, we make comparisons to predictions from three global sealevel models. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet South Shetland Islands University of Glasgow: Enlighten - Publications Antarctic Antarctic Peninsula Fildes ENVELOPE(-58.817,-58.817,-62.217,-62.217) Fildes peninsula ENVELOPE(-58.948,-58.948,-62.182,-62.182) South Shetland Islands Quaternary Science Reviews 30 21-22 3152 3170 |
institution |
Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
unknown |
description |
Precise relativesealevel (RSL) data are important for inferring regional ice sheet histories, as well as helping to validate numerical models of ice sheet evolution and glacial isostatic adjustment. Here we develop anew RSL curve for Fildes Peninsula, SouthShetlandIslands (SSIs), a sub-Antarctic archipelago peripheral to the northern Antarctic Peninsula ice sheet, by integrating sedimentary evidence from isolation basins with geomorphological evidence from raised beaches. This combined approach yields not only aHolocene RSL curve, but also the spatial pattern of how RSL change varied across the archipelago. The curve shows a mid-Holocene RSL highstand on Fildes Peninsula at 15.5 m above mean sealevel between 8000 and 7000 cal a BP. Subsequently RSL gradually fell as a consequence of isostatic uplift in response to regional deglaciation. We propose that isostatic uplift occurred at a non-steady rate, with a temporary pause in ice retreat ca. 7200 cal a BP, leading to a short-lived RSL rise of ∼1 m and forming a second peak to the mid-Holocene highstand. Two independent approaches were taken to constrain the long-term tectonic uplift rate of the SSIs at 0.22–0.48 m/ka, placing the tectonic contribution to the reconstructed RSL highstand between 1.4 and 2.9 m. Finally, we make comparisons to predictions from three global sealevel models. |
format |
Article in Journal/Newspaper |
author |
Watcham, E. Bentley, M.J. Hodgson, D.A. Roberts, S.J. Fretwell, P.T. Lloyd, J.M. Larter, R.D. Whitehouse, P.L. Leng, M.J. Monien, P. Moreton, S.G. |
spellingShingle |
Watcham, E. Bentley, M.J. Hodgson, D.A. Roberts, S.J. Fretwell, P.T. Lloyd, J.M. Larter, R.D. Whitehouse, P.L. Leng, M.J. Monien, P. Moreton, S.G. A new Holocene relative sea level curve for the South Shetland Islands, Antarctica |
author_facet |
Watcham, E. Bentley, M.J. Hodgson, D.A. Roberts, S.J. Fretwell, P.T. Lloyd, J.M. Larter, R.D. Whitehouse, P.L. Leng, M.J. Monien, P. Moreton, S.G. |
author_sort |
Watcham, E. |
title |
A new Holocene relative sea level curve for the South Shetland Islands, Antarctica |
title_short |
A new Holocene relative sea level curve for the South Shetland Islands, Antarctica |
title_full |
A new Holocene relative sea level curve for the South Shetland Islands, Antarctica |
title_fullStr |
A new Holocene relative sea level curve for the South Shetland Islands, Antarctica |
title_full_unstemmed |
A new Holocene relative sea level curve for the South Shetland Islands, Antarctica |
title_sort |
new holocene relative sea level curve for the south shetland islands, antarctica |
publishDate |
2011 |
url |
http://eprints.gla.ac.uk/67303/ |
long_lat |
ENVELOPE(-58.817,-58.817,-62.217,-62.217) ENVELOPE(-58.948,-58.948,-62.182,-62.182) |
geographic |
Antarctic Antarctic Peninsula Fildes Fildes peninsula South Shetland Islands |
geographic_facet |
Antarctic Antarctic Peninsula Fildes Fildes peninsula South Shetland Islands |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet South Shetland Islands |
op_relation |
Watcham, E. et al. (2011) A new Holocene relative sea level curve for the South Shetland Islands, Antarctica. Quaternary Science Reviews <http://eprints.gla.ac.uk/view/journal_volume/Quaternary_Science_Reviews.html>, 30(21-22), pp. 3152-3170. (doi:10.1016/j.quascirev.2011.07.021 <http://dx.doi.org/10.1016/j.quascirev.2011.07.021>) |
op_doi |
https://doi.org/10.1016/j.quascirev.2011.07.021 |
container_title |
Quaternary Science Reviews |
container_volume |
30 |
container_issue |
21-22 |
container_start_page |
3152 |
op_container_end_page |
3170 |
_version_ |
1766015964196896768 |