(Table 1) Accumulation and ice discharge of West Antarctic glaciers draining into the Amundsen Sea between 1974 and 2007
The Advanced Land Observation System (ALOS) Phased-Array Synthetic-Aperture Radar (PALSAR) is an L-band frequency (1.27 GHz) radar capable of continental-scale interferometric observations of ice sheet motion. Here, we show that PALSAR data yield excellent measurements of ice motion compared to C-ba...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.819262 2023-05-15T13:24:09+02:00 (Table 1) Accumulation and ice discharge of West Antarctic glaciers draining into the Amundsen Sea between 1974 and 2007 Rignot, Eric MEDIAN LATITUDE: -75.114500 * MEDIAN LONGITUDE: -107.410500 * SOUTH-BOUND LATITUDE: -75.121000 * WEST-BOUND LONGITUDE: -114.021000 * NORTH-BOUND LATITUDE: -75.108000 * EAST-BOUND LONGITUDE: -100.800000 2008-09-12 text/tab-separated-values, 70 data points https://doi.pangaea.de/10.1594/PANGAEA.819262 https://doi.org/10.1594/PANGAEA.819262 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.819262 https://doi.org/10.1594/PANGAEA.819262 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Rignot, Eric (2008): Changes in West Antarctic ice stream dynamics observed with ALOS PALSAR data. Geophysical Research Letters, 35(12), L12505, https://doi.org/10.1029/2008GL033365 Antarctica Area Glacier Glacier accumulation Glacier discharge InSAR (ALOS PALSAR) International Polar Year (2007-2008) IPY SAT Satellite remote sensing Standard deviation W-Antarctic-Glaciers Dataset 2008 ftpangaea https://doi.org/10.1594/PANGAEA.819262 https://doi.org/10.1029/2008GL033365 2023-01-20T09:01:34Z The Advanced Land Observation System (ALOS) Phased-Array Synthetic-Aperture Radar (PALSAR) is an L-band frequency (1.27 GHz) radar capable of continental-scale interferometric observations of ice sheet motion. Here, we show that PALSAR data yield excellent measurements of ice motion compared to C-band (5.6 GHz) radar data because of greater temporal coherence over snow and firn. We compare PALSAR velocities from year 2006 in Pine Island Bay, West Antarctica with those spanning years 1974 to 2007. Between 1996 and 2007, Pine Island Glacier sped up 42% and ungrounded over most of its ice plain. Smith Glacier accelerated 83% and ungrounded as well. Their largest speed up are recorded in 2007. Thwaites Glacier is not accelerating but widening with time and its eastern ice shelf doubled its speed. Total ice discharge from these glaciers increased 30% in 12 yr and the net mass loss increased 170% from 39 ± 15 Gt/yr to 105 ± 27 Gt/yr. Longer-term velocity changes suggest only a moderate loss in the 1970s. As the glaciers unground into the deeper, smoother beds inland, the mass loss from this region will grow considerably larger in years to come. Dataset Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Ice Shelf International Polar Year IPY Pine Island Pine Island Bay Pine Island Glacier Smith Glacier Thwaites Glacier West Antarctica PANGAEA - Data Publisher for Earth & Environmental Science Amundsen Sea Antarctic Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Thwaites Glacier ENVELOPE(-106.750,-106.750,-75.500,-75.500) West Antarctica ENVELOPE(-114.021000,-100.800000,-75.108000,-75.121000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Antarctica Area Glacier Glacier accumulation Glacier discharge InSAR (ALOS PALSAR) International Polar Year (2007-2008) IPY SAT Satellite remote sensing Standard deviation W-Antarctic-Glaciers |
spellingShingle |
Antarctica Area Glacier Glacier accumulation Glacier discharge InSAR (ALOS PALSAR) International Polar Year (2007-2008) IPY SAT Satellite remote sensing Standard deviation W-Antarctic-Glaciers Rignot, Eric (Table 1) Accumulation and ice discharge of West Antarctic glaciers draining into the Amundsen Sea between 1974 and 2007 |
topic_facet |
Antarctica Area Glacier Glacier accumulation Glacier discharge InSAR (ALOS PALSAR) International Polar Year (2007-2008) IPY SAT Satellite remote sensing Standard deviation W-Antarctic-Glaciers |
description |
The Advanced Land Observation System (ALOS) Phased-Array Synthetic-Aperture Radar (PALSAR) is an L-band frequency (1.27 GHz) radar capable of continental-scale interferometric observations of ice sheet motion. Here, we show that PALSAR data yield excellent measurements of ice motion compared to C-band (5.6 GHz) radar data because of greater temporal coherence over snow and firn. We compare PALSAR velocities from year 2006 in Pine Island Bay, West Antarctica with those spanning years 1974 to 2007. Between 1996 and 2007, Pine Island Glacier sped up 42% and ungrounded over most of its ice plain. Smith Glacier accelerated 83% and ungrounded as well. Their largest speed up are recorded in 2007. Thwaites Glacier is not accelerating but widening with time and its eastern ice shelf doubled its speed. Total ice discharge from these glaciers increased 30% in 12 yr and the net mass loss increased 170% from 39 ± 15 Gt/yr to 105 ± 27 Gt/yr. Longer-term velocity changes suggest only a moderate loss in the 1970s. As the glaciers unground into the deeper, smoother beds inland, the mass loss from this region will grow considerably larger in years to come. |
format |
Dataset |
author |
Rignot, Eric |
author_facet |
Rignot, Eric |
author_sort |
Rignot, Eric |
title |
(Table 1) Accumulation and ice discharge of West Antarctic glaciers draining into the Amundsen Sea between 1974 and 2007 |
title_short |
(Table 1) Accumulation and ice discharge of West Antarctic glaciers draining into the Amundsen Sea between 1974 and 2007 |
title_full |
(Table 1) Accumulation and ice discharge of West Antarctic glaciers draining into the Amundsen Sea between 1974 and 2007 |
title_fullStr |
(Table 1) Accumulation and ice discharge of West Antarctic glaciers draining into the Amundsen Sea between 1974 and 2007 |
title_full_unstemmed |
(Table 1) Accumulation and ice discharge of West Antarctic glaciers draining into the Amundsen Sea between 1974 and 2007 |
title_sort |
(table 1) accumulation and ice discharge of west antarctic glaciers draining into the amundsen sea between 1974 and 2007 |
publisher |
PANGAEA |
publishDate |
2008 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.819262 https://doi.org/10.1594/PANGAEA.819262 |
op_coverage |
MEDIAN LATITUDE: -75.114500 * MEDIAN LONGITUDE: -107.410500 * SOUTH-BOUND LATITUDE: -75.121000 * WEST-BOUND LONGITUDE: -114.021000 * NORTH-BOUND LATITUDE: -75.108000 * EAST-BOUND LONGITUDE: -100.800000 |
long_lat |
ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) ENVELOPE(-101.000,-101.000,-75.000,-75.000) ENVELOPE(-106.750,-106.750,-75.500,-75.500) ENVELOPE(-114.021000,-100.800000,-75.108000,-75.121000) |
geographic |
Amundsen Sea Antarctic Island Bay Pine Island Bay Pine Island Glacier Thwaites Glacier West Antarctica |
geographic_facet |
Amundsen Sea Antarctic Island Bay Pine Island Bay Pine Island Glacier Thwaites Glacier West Antarctica |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Ice Shelf International Polar Year IPY Pine Island Pine Island Bay Pine Island Glacier Smith Glacier Thwaites Glacier West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Ice Shelf International Polar Year IPY Pine Island Pine Island Bay Pine Island Glacier Smith Glacier Thwaites Glacier West Antarctica |
op_source |
Supplement to: Rignot, Eric (2008): Changes in West Antarctic ice stream dynamics observed with ALOS PALSAR data. Geophysical Research Letters, 35(12), L12505, https://doi.org/10.1029/2008GL033365 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.819262 https://doi.org/10.1594/PANGAEA.819262 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.819262 https://doi.org/10.1029/2008GL033365 |
_version_ |
1766377704004780032 |