Analysis of a GRACE Global Mascon Solution for Gulf of Alaska Glaciers
We present a high-resolution Gravity Recovery and Climate Experiment (GRACE) mascon solution for Gulf of Alaska (GOA) glaciers and compare this with in situ glaciological, climate and other remote-sensing observations. Our GRACE solution yields a GOA glacier mass balance of -6511 Gt a(exp.-1) for th...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20150023403 2023-05-15T16:20:19+02:00 Analysis of a GRACE Global Mascon Solution for Gulf of Alaska Glaciers Luthcke, Scott B. Arendt, Anthony O'Neel, Shad Hill, David Moholdt, Geir Gardner, Alex Abdalati, Waleed Unclassified, Unlimited, Publicly available June 20, 2013 application/pdf http://hdl.handle.net/2060/20150023403 unknown Document ID: 20150023403 http://hdl.handle.net/2060/20150023403 Copyright, Distribution as joint owner in the copyright CASI Earth Resources and Remote Sensing Geosciences (General) GSFC-E-DAA-TN28107 Journal of Glaciology (ISSN 1727-5652); 59; 217; 913-924 2013 ftnasantrs 2019-07-20T23:59:37Z We present a high-resolution Gravity Recovery and Climate Experiment (GRACE) mascon solution for Gulf of Alaska (GOA) glaciers and compare this with in situ glaciological, climate and other remote-sensing observations. Our GRACE solution yields a GOA glacier mass balance of -6511 Gt a(exp.-1) for the period December 2003 to December 2010, with summer balances driving the interannual variability. Between October/November 2003 and October 2009 we obtain a mass balance of -6111 Gt a(exp. -1) from GRACE, which compares well with -6512 Gt a(exp. -1) from ICESat based on hypsometric extrapolation of glacier elevation changes. We find that mean summer (June-August) air temperatures derived from both ground and lower-troposphere temperature records were good predictors of GRACE-derived summer mass balances, capturing 59% and 72% of the summer balance variability respectively. Large mass losses during 2009 were likely due to low early melt season surface albedos, measured by the Moderate Resolution Imaging Spectroradiometer (MODIS) and likely associated with the 31 March 2009 eruption of Mount Redoubt, southwestern Alaska. GRACE data compared well with in situ measurements atWolverine Glacier (maritime Alaska), but poorly with those at Gulkana Glacier (interior Alaska). We conclude that, although GOA mass estimates from GRACE are robust over the entire domain, further constraints on subregional and seasonal estimates are necessary to improve fidelity to ground observations. Other/Unknown Material glacier glaciers Alaska NASA Technical Reports Server (NTRS) Gulf of Alaska |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
language |
unknown |
topic |
Earth Resources and Remote Sensing Geosciences (General) |
spellingShingle |
Earth Resources and Remote Sensing Geosciences (General) Luthcke, Scott B. Arendt, Anthony O'Neel, Shad Hill, David Moholdt, Geir Gardner, Alex Abdalati, Waleed Analysis of a GRACE Global Mascon Solution for Gulf of Alaska Glaciers |
topic_facet |
Earth Resources and Remote Sensing Geosciences (General) |
description |
We present a high-resolution Gravity Recovery and Climate Experiment (GRACE) mascon solution for Gulf of Alaska (GOA) glaciers and compare this with in situ glaciological, climate and other remote-sensing observations. Our GRACE solution yields a GOA glacier mass balance of -6511 Gt a(exp.-1) for the period December 2003 to December 2010, with summer balances driving the interannual variability. Between October/November 2003 and October 2009 we obtain a mass balance of -6111 Gt a(exp. -1) from GRACE, which compares well with -6512 Gt a(exp. -1) from ICESat based on hypsometric extrapolation of glacier elevation changes. We find that mean summer (June-August) air temperatures derived from both ground and lower-troposphere temperature records were good predictors of GRACE-derived summer mass balances, capturing 59% and 72% of the summer balance variability respectively. Large mass losses during 2009 were likely due to low early melt season surface albedos, measured by the Moderate Resolution Imaging Spectroradiometer (MODIS) and likely associated with the 31 March 2009 eruption of Mount Redoubt, southwestern Alaska. GRACE data compared well with in situ measurements atWolverine Glacier (maritime Alaska), but poorly with those at Gulkana Glacier (interior Alaska). We conclude that, although GOA mass estimates from GRACE are robust over the entire domain, further constraints on subregional and seasonal estimates are necessary to improve fidelity to ground observations. |
format |
Other/Unknown Material |
author |
Luthcke, Scott B. Arendt, Anthony O'Neel, Shad Hill, David Moholdt, Geir Gardner, Alex Abdalati, Waleed |
author_facet |
Luthcke, Scott B. Arendt, Anthony O'Neel, Shad Hill, David Moholdt, Geir Gardner, Alex Abdalati, Waleed |
author_sort |
Luthcke, Scott B. |
title |
Analysis of a GRACE Global Mascon Solution for Gulf of Alaska Glaciers |
title_short |
Analysis of a GRACE Global Mascon Solution for Gulf of Alaska Glaciers |
title_full |
Analysis of a GRACE Global Mascon Solution for Gulf of Alaska Glaciers |
title_fullStr |
Analysis of a GRACE Global Mascon Solution for Gulf of Alaska Glaciers |
title_full_unstemmed |
Analysis of a GRACE Global Mascon Solution for Gulf of Alaska Glaciers |
title_sort |
analysis of a grace global mascon solution for gulf of alaska glaciers |
publishDate |
2013 |
url |
http://hdl.handle.net/2060/20150023403 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Gulf of Alaska |
geographic_facet |
Gulf of Alaska |
genre |
glacier glaciers Alaska |
genre_facet |
glacier glaciers Alaska |
op_source |
CASI |
op_relation |
Document ID: 20150023403 http://hdl.handle.net/2060/20150023403 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766008231544487936 |