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    Greenland Ice Sheet Mass Balance Reconstruction. Part III: Marine Ice Loss and Total Mass Balance (1840–2010)

    Source: Journal of Climate:;2013:;volume( 026 ):;issue: 018::page 6990
    Author:
    Box, Jason E.
    ,
    Colgan, William
    DOI: 10.1175/JCLI-D-12-00546.1
    Publisher: American Meteorological Society
    Abstract: reenland 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, LM). This study quantifies the relation between LM 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 LM variability over annual to decadal time scales. It is found that R enhances LM 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 LM 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 ± 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?1 century?1 over the entire reconstruction, reaching a peak sea level rise contribution of 6.1 mm decade?1 during 2002?10.
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      Greenland Ice Sheet Mass Balance Reconstruction. Part III: Marine Ice Loss and Total Mass Balance (1840–2010)

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4222518
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    contributor authorBox, Jason E.
    contributor authorColgan, William
    date accessioned2017-06-09T17:07:19Z
    date available2017-06-09T17:07:19Z
    date copyright2013/09/01
    date issued2013
    identifier issn0894-8755
    identifier otherams-79708.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4222518
    description abstractreenland 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, LM). This study quantifies the relation between LM 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 LM variability over annual to decadal time scales. It is found that R enhances LM 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 LM 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 ± 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?1 century?1 over the entire reconstruction, reaching a peak sea level rise contribution of 6.1 mm decade?1 during 2002?10.
    publisherAmerican Meteorological Society
    titleGreenland Ice Sheet Mass Balance Reconstruction. Part III: Marine Ice Loss and Total Mass Balance (1840–2010)
    typeJournal Paper
    journal volume26
    journal issue18
    journal titleJournal of Climate
    identifier doi10.1175/JCLI-D-12-00546.1
    journal fristpage6990
    journal lastpage7002
    treeJournal of Climate:;2013:;volume( 026 ):;issue: 018
    contenttypeFulltext
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