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    Increased Runoff from Melt from the Greenland Ice Sheet: A Response to Global Warming

    Source: Journal of Climate:;2008:;volume( 021 ):;issue: 002::page 331
    Author:
    Hanna, Edward
    ,
    Huybrechts, Philippe
    ,
    Steffen, Konrad
    ,
    Cappelen, John
    ,
    Huff, Russell
    ,
    Shuman, Christopher
    ,
    Irvine-Fynn, Tristram
    ,
    Wise, Stephen
    ,
    Griffiths, Michael
    DOI: 10.1175/2007JCLI1964.1
    Publisher: American Meteorological Society
    Abstract: The authors attribute significantly increased Greenland summer warmth and Greenland Ice Sheet melt and runoff since 1990 to global warming. Southern Greenland coastal and Northern Hemisphere summer temperatures were uncorrelated between the 1960s and early 1990s but were significantly positively correlated thereafter. This relationship appears to have been modulated by the North Atlantic Oscillation, whose summer index was significantly (negatively) correlated with southern Greenland summer temperatures until the early 1990s but not thereafter. Significant warming in southern Greenland since ?1990, as also evidenced from Swiss Camp on the west flank of the ice sheet, therefore reflects general Northern Hemisphere and global warming. Summer 2003 was the warmest since at least 1958 in coastal southern Greenland. The second warmest coastal summer 2005 had the most extensive anomalously warm conditions over the ablation zone of the ice sheet, which caused a record melt extent. The year 2006 was the third warmest in coastal southern Greenland and had the third-highest modeled runoff in the last 49 yr from the ice sheet; five of the nine highest runoff years occurred since 2001 inclusive. Significantly rising runoff since 1958 was largely compensated by increased precipitation and snow accumulation. Also, as observed since 1987 in a single composite record at Summit, summer temperatures near the top of the ice sheet have declined slightly but not significantly, suggesting the overall ice sheet is experiencing a dichotomous response to the recent general warming: possible reasons include the ice sheet?s high thermal inertia, higher atmospheric cooling, or changes in regional wind, cloud, and/or radiation patterns.
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      Increased Runoff from Melt from the Greenland Ice Sheet: A Response to Global Warming

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4207109
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    contributor authorHanna, Edward
    contributor authorHuybrechts, Philippe
    contributor authorSteffen, Konrad
    contributor authorCappelen, John
    contributor authorHuff, Russell
    contributor authorShuman, Christopher
    contributor authorIrvine-Fynn, Tristram
    contributor authorWise, Stephen
    contributor authorGriffiths, Michael
    date accessioned2017-06-09T16:19:45Z
    date available2017-06-09T16:19:45Z
    date copyright2008/01/01
    date issued2008
    identifier issn0894-8755
    identifier otherams-65840.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4207109
    description abstractThe authors attribute significantly increased Greenland summer warmth and Greenland Ice Sheet melt and runoff since 1990 to global warming. Southern Greenland coastal and Northern Hemisphere summer temperatures were uncorrelated between the 1960s and early 1990s but were significantly positively correlated thereafter. This relationship appears to have been modulated by the North Atlantic Oscillation, whose summer index was significantly (negatively) correlated with southern Greenland summer temperatures until the early 1990s but not thereafter. Significant warming in southern Greenland since ?1990, as also evidenced from Swiss Camp on the west flank of the ice sheet, therefore reflects general Northern Hemisphere and global warming. Summer 2003 was the warmest since at least 1958 in coastal southern Greenland. The second warmest coastal summer 2005 had the most extensive anomalously warm conditions over the ablation zone of the ice sheet, which caused a record melt extent. The year 2006 was the third warmest in coastal southern Greenland and had the third-highest modeled runoff in the last 49 yr from the ice sheet; five of the nine highest runoff years occurred since 2001 inclusive. Significantly rising runoff since 1958 was largely compensated by increased precipitation and snow accumulation. Also, as observed since 1987 in a single composite record at Summit, summer temperatures near the top of the ice sheet have declined slightly but not significantly, suggesting the overall ice sheet is experiencing a dichotomous response to the recent general warming: possible reasons include the ice sheet?s high thermal inertia, higher atmospheric cooling, or changes in regional wind, cloud, and/or radiation patterns.
    publisherAmerican Meteorological Society
    titleIncreased Runoff from Melt from the Greenland Ice Sheet: A Response to Global Warming
    typeJournal Paper
    journal volume21
    journal issue2
    journal titleJournal of Climate
    identifier doi10.1175/2007JCLI1964.1
    journal fristpage331
    journal lastpage341
    treeJournal of Climate:;2008:;volume( 021 ):;issue: 002
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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