Intrinsic processes drive variability in basal melting of the Totten Glacier Ice Shelf
Over the period 2003–2008, the Totten Ice Shelf (TIS) was shown to be rapidly thinning, likely due to basal melting. However, a recent study using a longer time series found high interannual variability present in TIS surface elevation without any apparent trend. Here we show that low-frequency intr...
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Online Access: | https://eprints.utas.edu.au/28059/ https://eprints.utas.edu.au/28059/1/ncomms%20gwyther%202018.pdf |
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ftunivtasmania:oai:eprints.utas.edu.au:28059 2023-05-15T13:31:53+02:00 Intrinsic processes drive variability in basal melting of the Totten Glacier Ice Shelf Gwyther, DE O'Kane, TJ Galton-Fenzi, BK Monselesan, DP Greenbaum, JS 2018 application/pdf https://eprints.utas.edu.au/28059/ https://eprints.utas.edu.au/28059/1/ncomms%20gwyther%202018.pdf en eng Nature Publishing Group https://eprints.utas.edu.au/28059/1/ncomms%20gwyther%202018.pdf Gwyther, DE orcid:0000-0002-7218-2785 , O'Kane, TJ, Galton-Fenzi, BK, Monselesan, DP and Greenbaum, JS 2018 , 'Intrinsic processes drive variability in basal melting of the Totten Glacier Ice Shelf' , Nature Communications, vol. 9 , pp. 1-8 , doi:10.1038/s41467-018-05618-2 <http://dx.doi.org/10.1038/s41467-018-05618-2>. Antarctica Totten Glacier ice sheet intrinsic variability Article PeerReviewed 2018 ftunivtasmania https://doi.org/10.1038/s41467-018-05618-2 2021-09-13T22:18:38Z Over the period 2003–2008, the Totten Ice Shelf (TIS) was shown to be rapidly thinning, likely due to basal melting. However, a recent study using a longer time series found high interannual variability present in TIS surface elevation without any apparent trend. Here we show that low-frequency intrinsic ocean variability potentially accounts for a large fraction of the variability in the basal melting of TIS. Specifically, numerical ocean model simulations show that up to 44% of the modelled variability in basal melting in the 1–5 year timescale (and up to 21% in the 5–10 year timescale) is intrinsic, with a similar response to the full climate forcing. We identify the important role of intrinsic ocean variability in setting the observed interannual variation in TIS surface thickness and velocity. Our results further demonstrate the need to account for intrinsic ocean processes in the detection and attribution of change. Article in Journal/Newspaper Antarc* Antarctica Ice Sheet Ice Shelf Totten Glacier Totten Ice Shelf University of Tasmania: UTas ePrints Totten Glacier ENVELOPE(116.333,116.333,-66.833,-66.833) Nature Communications 9 1 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Antarctica Totten Glacier ice sheet intrinsic variability |
spellingShingle |
Antarctica Totten Glacier ice sheet intrinsic variability Gwyther, DE O'Kane, TJ Galton-Fenzi, BK Monselesan, DP Greenbaum, JS Intrinsic processes drive variability in basal melting of the Totten Glacier Ice Shelf |
topic_facet |
Antarctica Totten Glacier ice sheet intrinsic variability |
description |
Over the period 2003–2008, the Totten Ice Shelf (TIS) was shown to be rapidly thinning, likely due to basal melting. However, a recent study using a longer time series found high interannual variability present in TIS surface elevation without any apparent trend. Here we show that low-frequency intrinsic ocean variability potentially accounts for a large fraction of the variability in the basal melting of TIS. Specifically, numerical ocean model simulations show that up to 44% of the modelled variability in basal melting in the 1–5 year timescale (and up to 21% in the 5–10 year timescale) is intrinsic, with a similar response to the full climate forcing. We identify the important role of intrinsic ocean variability in setting the observed interannual variation in TIS surface thickness and velocity. Our results further demonstrate the need to account for intrinsic ocean processes in the detection and attribution of change. |
format |
Article in Journal/Newspaper |
author |
Gwyther, DE O'Kane, TJ Galton-Fenzi, BK Monselesan, DP Greenbaum, JS |
author_facet |
Gwyther, DE O'Kane, TJ Galton-Fenzi, BK Monselesan, DP Greenbaum, JS |
author_sort |
Gwyther, DE |
title |
Intrinsic processes drive variability in basal melting of the Totten Glacier Ice Shelf |
title_short |
Intrinsic processes drive variability in basal melting of the Totten Glacier Ice Shelf |
title_full |
Intrinsic processes drive variability in basal melting of the Totten Glacier Ice Shelf |
title_fullStr |
Intrinsic processes drive variability in basal melting of the Totten Glacier Ice Shelf |
title_full_unstemmed |
Intrinsic processes drive variability in basal melting of the Totten Glacier Ice Shelf |
title_sort |
intrinsic processes drive variability in basal melting of the totten glacier ice shelf |
publisher |
Nature Publishing Group |
publishDate |
2018 |
url |
https://eprints.utas.edu.au/28059/ https://eprints.utas.edu.au/28059/1/ncomms%20gwyther%202018.pdf |
long_lat |
ENVELOPE(116.333,116.333,-66.833,-66.833) |
geographic |
Totten Glacier |
geographic_facet |
Totten Glacier |
genre |
Antarc* Antarctica Ice Sheet Ice Shelf Totten Glacier Totten Ice Shelf |
genre_facet |
Antarc* Antarctica Ice Sheet Ice Shelf Totten Glacier Totten Ice Shelf |
op_relation |
https://eprints.utas.edu.au/28059/1/ncomms%20gwyther%202018.pdf Gwyther, DE orcid:0000-0002-7218-2785 , O'Kane, TJ, Galton-Fenzi, BK, Monselesan, DP and Greenbaum, JS 2018 , 'Intrinsic processes drive variability in basal melting of the Totten Glacier Ice Shelf' , Nature Communications, vol. 9 , pp. 1-8 , doi:10.1038/s41467-018-05618-2 <http://dx.doi.org/10.1038/s41467-018-05618-2>. |
op_doi |
https://doi.org/10.1038/s41467-018-05618-2 |
container_title |
Nature Communications |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766021860507516928 |