Greenland ice sheet mass balance reconstruction. Part III: marine ice loss and total mass balance (1840–2010).
ABSTRACT Greenland ice sheet mass loss to the marine environment occurs by some combination of iceberg calving and underwater melting (referred to here as marine ice loss, L M ). This study quantifies the relation between L M and meltwater runoff (R) at the ice sheet scale. A theoretical basis is pr...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1087.5435 2023-05-15T16:21:16+02:00 Greenland ice sheet mass balance reconstruction. Part III: marine ice loss and total mass balance (1840–2010). Jason E Box William Colgan The Pennsylvania State University CiteSeerX Archives 2013 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1087.5435 http://www.williamcolgan.net/pubs/JCLI-D-12-00546.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1087.5435 http://www.williamcolgan.net/pubs/JCLI-D-12-00546.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.williamcolgan.net/pubs/JCLI-D-12-00546.pdf text 2013 ftciteseerx 2020-05-24T00:16:56Z ABSTRACT Greenland ice sheet mass loss to the marine environment occurs by some combination of iceberg calving and underwater melting (referred to here as marine ice loss, L M ). This study quantifies the relation between L M and meltwater runoff (R) at the ice sheet scale. A theoretical basis is presented explaining how variability in R can be expected to govern much of the L M variability over annual to decadal time scales. It is found that R enhances L M through three processes: 1) increased glacier discharge by ice warming-softening and basal lubrication-sliding; 2) increased calving susceptibility through undercutting glacier front geometry and reducing ice integrity; and 3) increased underwater melting from forcing marine convection. Applying a semiempirical L M f(R) parameterization to a surface mass balance reconstruction enables total ice sheet mass budget closure over the 1840-2010 period. The estimated cumulative 171-yr net ice sheet sea level contribution is 25 6 10 mm, the rise punctuated by periods of ice sheet net mass gain (sea level drawdown) (1893-1900, 1938-47, and 1972-98). The sea level contribution accelerated at 27.6 mm yr 21 century 21 over the entire reconstruction, reaching a peak sea level rise contribution of 6.1 mm decade 21 during 2002-10. Text glacier Greenland Ice Sheet Unknown Greenland |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
ABSTRACT Greenland ice sheet mass loss to the marine environment occurs by some combination of iceberg calving and underwater melting (referred to here as marine ice loss, L M ). This study quantifies the relation between L M and meltwater runoff (R) at the ice sheet scale. A theoretical basis is presented explaining how variability in R can be expected to govern much of the L M variability over annual to decadal time scales. It is found that R enhances L M through three processes: 1) increased glacier discharge by ice warming-softening and basal lubrication-sliding; 2) increased calving susceptibility through undercutting glacier front geometry and reducing ice integrity; and 3) increased underwater melting from forcing marine convection. Applying a semiempirical L M f(R) parameterization to a surface mass balance reconstruction enables total ice sheet mass budget closure over the 1840-2010 period. The estimated cumulative 171-yr net ice sheet sea level contribution is 25 6 10 mm, the rise punctuated by periods of ice sheet net mass gain (sea level drawdown) (1893-1900, 1938-47, and 1972-98). The sea level contribution accelerated at 27.6 mm yr 21 century 21 over the entire reconstruction, reaching a peak sea level rise contribution of 6.1 mm decade 21 during 2002-10. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Jason E Box William Colgan |
spellingShingle |
Jason E Box William Colgan Greenland ice sheet mass balance reconstruction. Part III: marine ice loss and total mass balance (1840–2010). |
author_facet |
Jason E Box William Colgan |
author_sort |
Jason E Box |
title |
Greenland ice sheet mass balance reconstruction. Part III: marine ice loss and total mass balance (1840–2010). |
title_short |
Greenland ice sheet mass balance reconstruction. Part III: marine ice loss and total mass balance (1840–2010). |
title_full |
Greenland ice sheet mass balance reconstruction. Part III: marine ice loss and total mass balance (1840–2010). |
title_fullStr |
Greenland ice sheet mass balance reconstruction. Part III: marine ice loss and total mass balance (1840–2010). |
title_full_unstemmed |
Greenland ice sheet mass balance reconstruction. Part III: marine ice loss and total mass balance (1840–2010). |
title_sort |
greenland ice sheet mass balance reconstruction. part iii: marine ice loss and total mass balance (1840–2010). |
publishDate |
2013 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1087.5435 http://www.williamcolgan.net/pubs/JCLI-D-12-00546.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Ice Sheet |
genre_facet |
glacier Greenland Ice Sheet |
op_source |
http://www.williamcolgan.net/pubs/JCLI-D-12-00546.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1087.5435 http://www.williamcolgan.net/pubs/JCLI-D-12-00546.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766009282704179200 |