Accumulation variability and mass budgets of the Lambert Glacier-Amery Ice Shelf system at high elevations
The temporal and spatial variability of the annual accumulation rate and the mass budgets of five sub-basins of the Lambert GlacierAmery Ice Shelf system (LAS), East Antarctica, at high elevations are assessed using a variety of datasets derived from field measurements and modeling. The annual tempo...
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ftawi:oai:epic.awi.de:13362 2023-09-05T13:11:41+02:00 Accumulation variability and mass budgets of the Lambert Glacier-Amery Ice Shelf system at high elevations Wen, J. Jezek, K. C. Monaghan, A. J. Sun, B. Ren, Jian Huybrechts, Philippe 2006 application/pdf https://epic.awi.de/id/eprint/13362/ https://epic.awi.de/id/eprint/13362/1/Wen2006a.pdf https://hdl.handle.net/10013/epic.26803 https://hdl.handle.net/10013/epic.26803.d001 unknown https://epic.awi.de/id/eprint/13362/1/Wen2006a.pdf https://hdl.handle.net/10013/epic.26803.d001 Wen, J. , Jezek, K. C. , Monaghan, A. J. , Sun, B. , Ren, J. and Huybrechts, P. (2006) Accumulation variability and mass budgets of the Lambert Glacier-Amery Ice Shelf system at high elevations , Annals of Glaciology, 43 , pp. 351-360 . hdl:10013/epic.26803 EPIC3Annals of Glaciology, 43, pp. 351-360 Article isiRev 2006 ftawi 2023-08-22T19:50:31Z The temporal and spatial variability of the annual accumulation rate and the mass budgets of five sub-basins of the Lambert GlacierAmery Ice Shelf system (LAS), East Antarctica, at high elevations are assessed using a variety of datasets derived from field measurements and modeling. The annual temporal variations of the accumulation rate for four cores from the west and east sides of the LAS are around ±34%. Decadal fluctuation of the accumulation from the DT001 firn core drops to ±10%, and the 30 year fluctuation to ±5%, which is assumed to contain the information about the regional and long-term trend in accumulation. The 15-point running mean of the annual accumulation rate derived from stake measurements can remove most of the high-frequency spatial variation so as to better represent the local accumulation. Model simulations show that the spatial variability of erosion/ deposition of snow by the wind has a noticeable impact on the surface mass balance at the higher parts of the LAS. Mass-budget estimates at high-elevation sub-basins of the LAS suggest drainage 9 has a negative imbalance of 0.7±0.4 Gt a1, Lambert and Mellor Glaciers have a positive imbalance of 3.9±2.1 and 2.1±2.4 Gt a1 respectively, and Fisher Glacier and drainage 11 are approximately in balance. The higher-elevation region as a whole has a positive mass imbalance of 4.4±6.3 Gt a1, which is consistent with the most recent radar altimetry assessment that shows an overall thickening over this region. Article in Journal/Newspaper Amery Ice Shelf Annals of Glaciology Antarc* Antarctica East Antarctica Fisher Glacier Ice Shelf Lambert Glacier Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) East Antarctica Fisher Glacier ENVELOPE(66.000,66.000,-73.250,-73.250) Lambert Glacier ENVELOPE(67.490,67.490,-73.065,-73.065) Mellor ENVELOPE(-114.944,-114.944,60.714,60.714) |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The temporal and spatial variability of the annual accumulation rate and the mass budgets of five sub-basins of the Lambert GlacierAmery Ice Shelf system (LAS), East Antarctica, at high elevations are assessed using a variety of datasets derived from field measurements and modeling. The annual temporal variations of the accumulation rate for four cores from the west and east sides of the LAS are around ±34%. Decadal fluctuation of the accumulation from the DT001 firn core drops to ±10%, and the 30 year fluctuation to ±5%, which is assumed to contain the information about the regional and long-term trend in accumulation. The 15-point running mean of the annual accumulation rate derived from stake measurements can remove most of the high-frequency spatial variation so as to better represent the local accumulation. Model simulations show that the spatial variability of erosion/ deposition of snow by the wind has a noticeable impact on the surface mass balance at the higher parts of the LAS. Mass-budget estimates at high-elevation sub-basins of the LAS suggest drainage 9 has a negative imbalance of 0.7±0.4 Gt a1, Lambert and Mellor Glaciers have a positive imbalance of 3.9±2.1 and 2.1±2.4 Gt a1 respectively, and Fisher Glacier and drainage 11 are approximately in balance. The higher-elevation region as a whole has a positive mass imbalance of 4.4±6.3 Gt a1, which is consistent with the most recent radar altimetry assessment that shows an overall thickening over this region. |
format |
Article in Journal/Newspaper |
author |
Wen, J. Jezek, K. C. Monaghan, A. J. Sun, B. Ren, Jian Huybrechts, Philippe |
spellingShingle |
Wen, J. Jezek, K. C. Monaghan, A. J. Sun, B. Ren, Jian Huybrechts, Philippe Accumulation variability and mass budgets of the Lambert Glacier-Amery Ice Shelf system at high elevations |
author_facet |
Wen, J. Jezek, K. C. Monaghan, A. J. Sun, B. Ren, Jian Huybrechts, Philippe |
author_sort |
Wen, J. |
title |
Accumulation variability and mass budgets of the Lambert Glacier-Amery Ice Shelf system at high elevations |
title_short |
Accumulation variability and mass budgets of the Lambert Glacier-Amery Ice Shelf system at high elevations |
title_full |
Accumulation variability and mass budgets of the Lambert Glacier-Amery Ice Shelf system at high elevations |
title_fullStr |
Accumulation variability and mass budgets of the Lambert Glacier-Amery Ice Shelf system at high elevations |
title_full_unstemmed |
Accumulation variability and mass budgets of the Lambert Glacier-Amery Ice Shelf system at high elevations |
title_sort |
accumulation variability and mass budgets of the lambert glacier-amery ice shelf system at high elevations |
publishDate |
2006 |
url |
https://epic.awi.de/id/eprint/13362/ https://epic.awi.de/id/eprint/13362/1/Wen2006a.pdf https://hdl.handle.net/10013/epic.26803 https://hdl.handle.net/10013/epic.26803.d001 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) ENVELOPE(66.000,66.000,-73.250,-73.250) ENVELOPE(67.490,67.490,-73.065,-73.065) ENVELOPE(-114.944,-114.944,60.714,60.714) |
geographic |
Amery Amery Ice Shelf East Antarctica Fisher Glacier Lambert Glacier Mellor |
geographic_facet |
Amery Amery Ice Shelf East Antarctica Fisher Glacier Lambert Glacier Mellor |
genre |
Amery Ice Shelf Annals of Glaciology Antarc* Antarctica East Antarctica Fisher Glacier Ice Shelf Lambert Glacier |
genre_facet |
Amery Ice Shelf Annals of Glaciology Antarc* Antarctica East Antarctica Fisher Glacier Ice Shelf Lambert Glacier |
op_source |
EPIC3Annals of Glaciology, 43, pp. 351-360 |
op_relation |
https://epic.awi.de/id/eprint/13362/1/Wen2006a.pdf https://hdl.handle.net/10013/epic.26803.d001 Wen, J. , Jezek, K. C. , Monaghan, A. J. , Sun, B. , Ren, J. and Huybrechts, P. (2006) Accumulation variability and mass budgets of the Lambert Glacier-Amery Ice Shelf system at high elevations , Annals of Glaciology, 43 , pp. 351-360 . hdl:10013/epic.26803 |
_version_ |
1776196813819215872 |