Getz Ice Shelf melting response to changes in ocean forcing
The large and complex Getz Ice Shelf extends along nearly half of the West Antarctic coastline in the Amundsen Sea and is exposed to a more variable ocean environment than most other Pacific sector ice shelves. Ocean temperature, salinity, and dissolved oxygen profiles acquired near its sub-ice cavi...
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ftcdlib:oai:escholarship.org/ark:/13030/qt5dh788mw 2023-05-15T13:24:06+02:00 Getz Ice Shelf melting response to changes in ocean forcing Jacobs, S Giulivi, C Dutrieux, P Rignot, E Nitsche, F Mouginot, J 4152 - 4168 2013-09-01 application/pdf https://escholarship.org/uc/item/5dh788mw unknown eScholarship, University of California qt5dh788mw https://escholarship.org/uc/item/5dh788mw CC-BY CC-BY Journal of Geophysical Research: Oceans, vol 118, iss 9 Antarctic Amundsen meltwater thermocline ice shelf Geophysics Oceanography Physical Geography and Environmental Geoscience article 2013 ftcdlib 2021-02-18T15:14:50Z The large and complex Getz Ice Shelf extends along nearly half of the West Antarctic coastline in the Amundsen Sea and is exposed to a more variable ocean environment than most other Pacific sector ice shelves. Ocean temperature, salinity, and dissolved oxygen profiles acquired near its sub-ice cavity openings are used here to estimate seawater transports and meltwater fractions. More complete coverage during 2000 and 2007 brackets most of the variability observed from 1994 to 2011, and yearlong records near one ice front support the use of summer profiles to determine annual basal melt rates. We find area average rates of 1.1 and 4.1 m/yr, higher in 2007 when a larger volume of warmer deep water occupied the adjacent continental shelf, and the ocean circulation was stronger. Results are consistent with changes in thermocline depths relative to ice shelf draft and mass transports onto the adjacent continental shelf. We also calculate steady state and actual melting of 2.5 and 4.6 m/yr in 2007-2008 from satellite measurements of ice flux, modeled accumulation, and thinning from 2003 to 2008. This implies a positive mass balance in 2000, but negative in 2007, when the Getz was producing more meltwater than any of the larger, slower melting or smaller, faster-melting ice shelves. © 2013. American Geophysical Union. All Rights Reserved. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Getz Ice Shelf Ice Shelf Ice Shelves University of California: eScholarship Amundsen Sea Antarctic Getz ENVELOPE(-145.217,-145.217,-76.550,-76.550) Getz Ice Shelf ENVELOPE(-126.500,-126.500,-74.250,-74.250) Pacific |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Antarctic Amundsen meltwater thermocline ice shelf Geophysics Oceanography Physical Geography and Environmental Geoscience |
spellingShingle |
Antarctic Amundsen meltwater thermocline ice shelf Geophysics Oceanography Physical Geography and Environmental Geoscience Jacobs, S Giulivi, C Dutrieux, P Rignot, E Nitsche, F Mouginot, J Getz Ice Shelf melting response to changes in ocean forcing |
topic_facet |
Antarctic Amundsen meltwater thermocline ice shelf Geophysics Oceanography Physical Geography and Environmental Geoscience |
description |
The large and complex Getz Ice Shelf extends along nearly half of the West Antarctic coastline in the Amundsen Sea and is exposed to a more variable ocean environment than most other Pacific sector ice shelves. Ocean temperature, salinity, and dissolved oxygen profiles acquired near its sub-ice cavity openings are used here to estimate seawater transports and meltwater fractions. More complete coverage during 2000 and 2007 brackets most of the variability observed from 1994 to 2011, and yearlong records near one ice front support the use of summer profiles to determine annual basal melt rates. We find area average rates of 1.1 and 4.1 m/yr, higher in 2007 when a larger volume of warmer deep water occupied the adjacent continental shelf, and the ocean circulation was stronger. Results are consistent with changes in thermocline depths relative to ice shelf draft and mass transports onto the adjacent continental shelf. We also calculate steady state and actual melting of 2.5 and 4.6 m/yr in 2007-2008 from satellite measurements of ice flux, modeled accumulation, and thinning from 2003 to 2008. This implies a positive mass balance in 2000, but negative in 2007, when the Getz was producing more meltwater than any of the larger, slower melting or smaller, faster-melting ice shelves. © 2013. American Geophysical Union. All Rights Reserved. |
format |
Article in Journal/Newspaper |
author |
Jacobs, S Giulivi, C Dutrieux, P Rignot, E Nitsche, F Mouginot, J |
author_facet |
Jacobs, S Giulivi, C Dutrieux, P Rignot, E Nitsche, F Mouginot, J |
author_sort |
Jacobs, S |
title |
Getz Ice Shelf melting response to changes in ocean forcing |
title_short |
Getz Ice Shelf melting response to changes in ocean forcing |
title_full |
Getz Ice Shelf melting response to changes in ocean forcing |
title_fullStr |
Getz Ice Shelf melting response to changes in ocean forcing |
title_full_unstemmed |
Getz Ice Shelf melting response to changes in ocean forcing |
title_sort |
getz ice shelf melting response to changes in ocean forcing |
publisher |
eScholarship, University of California |
publishDate |
2013 |
url |
https://escholarship.org/uc/item/5dh788mw |
op_coverage |
4152 - 4168 |
long_lat |
ENVELOPE(-145.217,-145.217,-76.550,-76.550) ENVELOPE(-126.500,-126.500,-74.250,-74.250) |
geographic |
Amundsen Sea Antarctic Getz Getz Ice Shelf Pacific |
geographic_facet |
Amundsen Sea Antarctic Getz Getz Ice Shelf Pacific |
genre |
Amundsen Sea Antarc* Antarctic Getz Ice Shelf Ice Shelf Ice Shelves |
genre_facet |
Amundsen Sea Antarc* Antarctic Getz Ice Shelf Ice Shelf Ice Shelves |
op_source |
Journal of Geophysical Research: Oceans, vol 118, iss 9 |
op_relation |
qt5dh788mw https://escholarship.org/uc/item/5dh788mw |
op_rights |
CC-BY |
op_rightsnorm |
CC-BY |
_version_ |
1766377494668115968 |