Tropical forcing of Circumpolar Deep Water Inflow and outlet glacier thinning in the Amundsen Sea Embayment, West Antarctica
Outlet glaciers draining the Antarctic ice sheet into the Amundsen Sea Embayment (ASE) have accelerated in recent decades, most likely as a result of increased melting of their ice-shelf termini by warm Circumpolar Deep Water (CDW). An ocean model forced with climate reanalysis data shows that, begi...
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International Glaciological Society
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Online Access: | https://nrl.northumbria.ac.uk/id/eprint/42267/ https://doi.org/10.3189/2012AoG60A110 https://nrl.northumbria.ac.uk/id/eprint/42267/1/Tropical_forcing_of_circumpolar_deep_water_inflow_and_outlet_glacier_thinning_in_the_amundsen_sea_embayment_west_antarctica.pdf |
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:42267 2023-05-15T13:23:50+02:00 Tropical forcing of Circumpolar Deep Water Inflow and outlet glacier thinning in the Amundsen Sea Embayment, West Antarctica Steig, E.J. Ding, Q. Battisti, D.S. Jenkins, Adrian 2012-11-01 text https://nrl.northumbria.ac.uk/id/eprint/42267/ https://doi.org/10.3189/2012AoG60A110 https://nrl.northumbria.ac.uk/id/eprint/42267/1/Tropical_forcing_of_circumpolar_deep_water_inflow_and_outlet_glacier_thinning_in_the_amundsen_sea_embayment_west_antarctica.pdf en eng International Glaciological Society https://nrl.northumbria.ac.uk/id/eprint/42267/1/Tropical_forcing_of_circumpolar_deep_water_inflow_and_outlet_glacier_thinning_in_the_amundsen_sea_embayment_west_antarctica.pdf Steig, E.J., Ding, Q., Battisti, D.S. and Jenkins, Adrian (2012) Tropical forcing of Circumpolar Deep Water Inflow and outlet glacier thinning in the Amundsen Sea Embayment, West Antarctica. Annals of Glaciology, 53 (60). pp. 19-28. ISSN 0260-3055 F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences F900 Others in Physical Sciences Article PeerReviewed 2012 ftunivnorthumb https://doi.org/10.3189/2012AoG60A110 2022-09-25T06:11:31Z Outlet glaciers draining the Antarctic ice sheet into the Amundsen Sea Embayment (ASE) have accelerated in recent decades, most likely as a result of increased melting of their ice-shelf termini by warm Circumpolar Deep Water (CDW). An ocean model forced with climate reanalysis data shows that, beginning in the early 1990s, an increase in westerly wind stress near the continental shelf edge drove an increase in CDWinflow onto the shelf. The change in local wind stress occurred predominantly in fall and early winter, associated with anomalous high sea-level pressure (SLP) to the north of the ASE and an increase in sea surface temperature (SST) in the central tropical Pacific. The SLP change is associated with geopotential height anomalies in the middle and upper troposphere, characteristic of a stationary Rossby wave response to tropical SST forcing, rather than with changes in the zonally symmetric circulation. Tropical Pacific warming similar to that of the 1990s occurred in the 1940s, and thus is a candidate for initiating the current period of ASE glacier retreat. Article in Journal/Newspaper Amundsen Sea Annals of Glaciology Antarc* Antarctic Antarctica Ice Sheet Ice Shelf West Antarctica Northumbria University, Newcastle: Northumbria Research Link (NRL) Amundsen Sea Antarctic Pacific The Antarctic West Antarctica Annals of Glaciology 53 60 19 28 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences F900 Others in Physical Sciences |
spellingShingle |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences F900 Others in Physical Sciences Steig, E.J. Ding, Q. Battisti, D.S. Jenkins, Adrian Tropical forcing of Circumpolar Deep Water Inflow and outlet glacier thinning in the Amundsen Sea Embayment, West Antarctica |
topic_facet |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences F900 Others in Physical Sciences |
description |
Outlet glaciers draining the Antarctic ice sheet into the Amundsen Sea Embayment (ASE) have accelerated in recent decades, most likely as a result of increased melting of their ice-shelf termini by warm Circumpolar Deep Water (CDW). An ocean model forced with climate reanalysis data shows that, beginning in the early 1990s, an increase in westerly wind stress near the continental shelf edge drove an increase in CDWinflow onto the shelf. The change in local wind stress occurred predominantly in fall and early winter, associated with anomalous high sea-level pressure (SLP) to the north of the ASE and an increase in sea surface temperature (SST) in the central tropical Pacific. The SLP change is associated with geopotential height anomalies in the middle and upper troposphere, characteristic of a stationary Rossby wave response to tropical SST forcing, rather than with changes in the zonally symmetric circulation. Tropical Pacific warming similar to that of the 1990s occurred in the 1940s, and thus is a candidate for initiating the current period of ASE glacier retreat. |
format |
Article in Journal/Newspaper |
author |
Steig, E.J. Ding, Q. Battisti, D.S. Jenkins, Adrian |
author_facet |
Steig, E.J. Ding, Q. Battisti, D.S. Jenkins, Adrian |
author_sort |
Steig, E.J. |
title |
Tropical forcing of Circumpolar Deep Water Inflow and outlet glacier thinning in the Amundsen Sea Embayment, West Antarctica |
title_short |
Tropical forcing of Circumpolar Deep Water Inflow and outlet glacier thinning in the Amundsen Sea Embayment, West Antarctica |
title_full |
Tropical forcing of Circumpolar Deep Water Inflow and outlet glacier thinning in the Amundsen Sea Embayment, West Antarctica |
title_fullStr |
Tropical forcing of Circumpolar Deep Water Inflow and outlet glacier thinning in the Amundsen Sea Embayment, West Antarctica |
title_full_unstemmed |
Tropical forcing of Circumpolar Deep Water Inflow and outlet glacier thinning in the Amundsen Sea Embayment, West Antarctica |
title_sort |
tropical forcing of circumpolar deep water inflow and outlet glacier thinning in the amundsen sea embayment, west antarctica |
publisher |
International Glaciological Society |
publishDate |
2012 |
url |
https://nrl.northumbria.ac.uk/id/eprint/42267/ https://doi.org/10.3189/2012AoG60A110 https://nrl.northumbria.ac.uk/id/eprint/42267/1/Tropical_forcing_of_circumpolar_deep_water_inflow_and_outlet_glacier_thinning_in_the_amundsen_sea_embayment_west_antarctica.pdf |
geographic |
Amundsen Sea Antarctic Pacific The Antarctic West Antarctica |
geographic_facet |
Amundsen Sea Antarctic Pacific The Antarctic West Antarctica |
genre |
Amundsen Sea Annals of Glaciology Antarc* Antarctic Antarctica Ice Sheet Ice Shelf West Antarctica |
genre_facet |
Amundsen Sea Annals of Glaciology Antarc* Antarctic Antarctica Ice Sheet Ice Shelf West Antarctica |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/42267/1/Tropical_forcing_of_circumpolar_deep_water_inflow_and_outlet_glacier_thinning_in_the_amundsen_sea_embayment_west_antarctica.pdf Steig, E.J., Ding, Q., Battisti, D.S. and Jenkins, Adrian (2012) Tropical forcing of Circumpolar Deep Water Inflow and outlet glacier thinning in the Amundsen Sea Embayment, West Antarctica. Annals of Glaciology, 53 (60). pp. 19-28. ISSN 0260-3055 |
op_doi |
https://doi.org/10.3189/2012AoG60A110 |
container_title |
Annals of Glaciology |
container_volume |
53 |
container_issue |
60 |
container_start_page |
19 |
op_container_end_page |
28 |
_version_ |
1766375761298587648 |