Mass Changes of the Greenland and Antarctic Ice Sheets and Shelves and Contributions to Sea-level Rise: 1992-2002
Changes in ice mass are estimated from elevation changes derived from 10.5 years (Greenland) and 9 years (Antarctica) of satellite radar altimetry data from the European Remote-sensing Satellites ERS-1 and -2. For the first time, the dH/dt values are adjusted for changes in surface elevation resulti...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20060024016 2023-05-15T13:34:40+02:00 Mass Changes of the Greenland and Antarctic Ice Sheets and Shelves and Contributions to Sea-level Rise: 1992-2002 Saba, Jack L. Beckley, Matthew A. Giovinetto, Mario B. Cornejo, Helen G. Zwally, H. Jay Li, Jun Brenner, Anita C. Yi, Donghui Unclassified, Unlimited, Publicly available 2005 application/pdf http://hdl.handle.net/2060/20060024016 unknown Document ID: 20060024016 http://hdl.handle.net/2060/20060024016 Copyright, Distribution as joint owner in the copyright CASI Earth Resources and Remote Sensing Journal of Glaciology; Volume 51; No. 175; 509-527 2005 ftnasantrs 2018-06-09T23:00:36Z Changes in ice mass are estimated from elevation changes derived from 10.5 years (Greenland) and 9 years (Antarctica) of satellite radar altimetry data from the European Remote-sensing Satellites ERS-1 and -2. For the first time, the dH/dt values are adjusted for changes in surface elevation resulting from temperature-driven variations in the rate of fun compaction. The Greenland ice sheet is thinning at the margins (-42 plus or minus 2 Gta(sup -1) below the equilibrium line altitude (ELA)) and growing inland (+53 plus or minus 2 Gt a(sup -1)above the ELA) with a small overall mass gain (+11 plus or minus 3 Gt a(sup -1); -0.03 mm a(sup -1) SLE (sea level equivalent)). The ice sheet in West Antarctica (WA) is losing mass (-47 (dot) 4 GT a(sup -1) and the ice sheet in East Antarctica (EA) shows a small mass gain (+16 plus or minus 11 Gt a(sup -1) for a combined net change of -31 plus or minus 12 Gt a(sup -1) (+0.08 mm a(sup -1) SLE)). The contribution of the three ice sheets to sea level is +0.05 plus or minus 0.03 mm a(sup -1). The Antarctic ice shelves show corresponding mass changes of -95 (dot) 11 Gt a(sup -1) in WA and +142 plus or minus 10 Gt a(sup -1) in EA. Thinning at the margins of the Greenland ice sheet and growth at higher elevations is an expected response to increasing temperatures and precipitation in a warming climate. The marked thinnings in the Pine Island and Thwaites Glacier basins of WA and the Totten Glacier basin in EA are probably ice-dynamic responses to long-term climate change and perhaps past removal of their adjacent ice shelves. The ice growth in the southern Antarctic Peninsula and parts of EA may be due to increasing precipitation during the last century. Other/Unknown Material Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica glacier Greenland Ice Sheet Ice Shelves Pine Island Thwaites Glacier Totten Glacier West Antarctica NASA Technical Reports Server (NTRS) Antarctic Antarctic Peninsula East Antarctica Ela ENVELOPE(9.642,9.642,63.170,63.170) Greenland The Antarctic Thwaites Glacier ENVELOPE(-106.750,-106.750,-75.500,-75.500) Totten Glacier ENVELOPE(116.333,116.333,-66.833,-66.833) West Antarctica |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Earth Resources and Remote Sensing |
spellingShingle |
Earth Resources and Remote Sensing Saba, Jack L. Beckley, Matthew A. Giovinetto, Mario B. Cornejo, Helen G. Zwally, H. Jay Li, Jun Brenner, Anita C. Yi, Donghui Mass Changes of the Greenland and Antarctic Ice Sheets and Shelves and Contributions to Sea-level Rise: 1992-2002 |
topic_facet |
Earth Resources and Remote Sensing |
description |
Changes in ice mass are estimated from elevation changes derived from 10.5 years (Greenland) and 9 years (Antarctica) of satellite radar altimetry data from the European Remote-sensing Satellites ERS-1 and -2. For the first time, the dH/dt values are adjusted for changes in surface elevation resulting from temperature-driven variations in the rate of fun compaction. The Greenland ice sheet is thinning at the margins (-42 plus or minus 2 Gta(sup -1) below the equilibrium line altitude (ELA)) and growing inland (+53 plus or minus 2 Gt a(sup -1)above the ELA) with a small overall mass gain (+11 plus or minus 3 Gt a(sup -1); -0.03 mm a(sup -1) SLE (sea level equivalent)). The ice sheet in West Antarctica (WA) is losing mass (-47 (dot) 4 GT a(sup -1) and the ice sheet in East Antarctica (EA) shows a small mass gain (+16 plus or minus 11 Gt a(sup -1) for a combined net change of -31 plus or minus 12 Gt a(sup -1) (+0.08 mm a(sup -1) SLE)). The contribution of the three ice sheets to sea level is +0.05 plus or minus 0.03 mm a(sup -1). The Antarctic ice shelves show corresponding mass changes of -95 (dot) 11 Gt a(sup -1) in WA and +142 plus or minus 10 Gt a(sup -1) in EA. Thinning at the margins of the Greenland ice sheet and growth at higher elevations is an expected response to increasing temperatures and precipitation in a warming climate. The marked thinnings in the Pine Island and Thwaites Glacier basins of WA and the Totten Glacier basin in EA are probably ice-dynamic responses to long-term climate change and perhaps past removal of their adjacent ice shelves. The ice growth in the southern Antarctic Peninsula and parts of EA may be due to increasing precipitation during the last century. |
format |
Other/Unknown Material |
author |
Saba, Jack L. Beckley, Matthew A. Giovinetto, Mario B. Cornejo, Helen G. Zwally, H. Jay Li, Jun Brenner, Anita C. Yi, Donghui |
author_facet |
Saba, Jack L. Beckley, Matthew A. Giovinetto, Mario B. Cornejo, Helen G. Zwally, H. Jay Li, Jun Brenner, Anita C. Yi, Donghui |
author_sort |
Saba, Jack L. |
title |
Mass Changes of the Greenland and Antarctic Ice Sheets and Shelves and Contributions to Sea-level Rise: 1992-2002 |
title_short |
Mass Changes of the Greenland and Antarctic Ice Sheets and Shelves and Contributions to Sea-level Rise: 1992-2002 |
title_full |
Mass Changes of the Greenland and Antarctic Ice Sheets and Shelves and Contributions to Sea-level Rise: 1992-2002 |
title_fullStr |
Mass Changes of the Greenland and Antarctic Ice Sheets and Shelves and Contributions to Sea-level Rise: 1992-2002 |
title_full_unstemmed |
Mass Changes of the Greenland and Antarctic Ice Sheets and Shelves and Contributions to Sea-level Rise: 1992-2002 |
title_sort |
mass changes of the greenland and antarctic ice sheets and shelves and contributions to sea-level rise: 1992-2002 |
publishDate |
2005 |
url |
http://hdl.handle.net/2060/20060024016 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(9.642,9.642,63.170,63.170) ENVELOPE(-106.750,-106.750,-75.500,-75.500) ENVELOPE(116.333,116.333,-66.833,-66.833) |
geographic |
Antarctic Antarctic Peninsula East Antarctica Ela Greenland The Antarctic Thwaites Glacier Totten Glacier West Antarctica |
geographic_facet |
Antarctic Antarctic Peninsula East Antarctica Ela Greenland The Antarctic Thwaites Glacier Totten Glacier West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica glacier Greenland Ice Sheet Ice Shelves Pine Island Thwaites Glacier Totten Glacier West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica glacier Greenland Ice Sheet Ice Shelves Pine Island Thwaites Glacier Totten Glacier West Antarctica |
op_source |
CASI |
op_relation |
Document ID: 20060024016 http://hdl.handle.net/2060/20060024016 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766055628584779776 |