000198659 001__ 198659
000198659 005__ 20181203023504.0
000198659 0247_ $$2doi$$a10.1002/joc.3743
000198659 022__ $$a0899-8418
000198659 02470 $$2ISI$$a000332833900007
000198659 037__ $$aARTICLE
000198659 245__ $$aAtmospheric and oceanic climate forcing of the exceptional Greenland ice sheet surface melt in summer 2012
000198659 260__ $$aHoboken$$bWiley-Blackwell$$c2014
000198659 269__ $$a2014
000198659 300__ $$a16
000198659 336__ $$aJournal Articles
000198659 520__ $$aThe NASA announcement of record surface melting of the Greenland ice sheet in July 2012 led us to examine the atmospheric and oceanic climatic anomalies that are likely to have contributed to these exceptional conditions and also to ask the question of how unusual these anomalies were compared to available records. Our analysis allows us to assess the relative contributions of these two key influences to both the extreme melt event and ongoing climate change. In 2012, as in recent warm summers since 2007, a blocking high pressure feature, associated with negative NAO conditions, was present in the mid-troposphere over Greenland for much of the summer. This circulation pattern advected relatively warm southerly winds over the western flank of the ice sheet, forming a heat dome' over Greenland that led to the widespread surface melting. Both sea-surface temperature and sea-ice cover anomalies seem to have played a minimal role in this record melt, relative to atmospheric circulation. Two representative coastal climatological station averages and several individual stations in south, west and north-west Greenland set new surface air temperature records for May, June, July and the whole (JJA) summer. The unusually warm summer 2012 conditions extended to the top of the ice sheet at Summit, where our reanalysed (1994-2012) DMI Summit weather station summer (JJA) temperature series set new record high mean and extreme temperatures in 2012; 3-hourly instantaneous 2-m temperatures reached an exceptional value of 2.2 degrees C at Summit on 11 July 2012. These conditions translated into the record observed ice-sheet wide melt during summer 2012. However, 2012 seems not to be climatically representative of future average' summers projected this century.
000198659 6531_ $$aclimate change
000198659 6531_ $$aglobal warming
000198659 6531_ $$aGreenland
000198659 6531_ $$asurface melt extent
000198659 6531_ $$atemperature
000198659 700__ $$aHanna, Edward$$uUniv Sheffield, Dept Geog, Sheffield S10 2TN, S Yorkshire, England
000198659 700__ $$aFettweis, Xavier$$uUniv Liege, Dept Geog, Climatol Lab, Liege, Belgium
000198659 700__ $$aMernild, Sebastian H.$$uLos Alamos Natl Lab, Climate Ocean & Sea Ice Modelling Grp, Los Alamos, NM USA
000198659 700__ $$aCappelen, John$$uDanish Meteorol Inst, Copenhagen, Denmark
000198659 700__ $$aRibergaard, Mads H.$$uDanish Meteorol Inst, Ctr Ocean & Ice, Copenhagen, Denmark
000198659 700__ $$aShuman, Christopher A.$$uUniv Maryland, Joint Ctr Earth Syst Technol, Baltimore, MD 21201 USA
000198659 700__ $$0246429$$aSteffen, Konrad$$g228967$$uWSL, Swiss Fed Res Inst, Birmensdorf, Switzerland
000198659 700__ $$aWood, Len$$uUniv Plymouth, Sch Marine Sci & Engn, Plymouth PL4 8AA, Devon, England
000198659 700__ $$aMote, Thomas L.
000198659 773__ $$j34$$k4$$q1022-1037$$tInternational Journal Of Climatology
000198659 909C0 $$0252485$$pUPSSC$$xU12615
000198659 909CO $$ooai:infoscience.tind.io:198659$$particle$$pENAC
000198659 937__ $$aEPFL-ARTICLE-198659
000198659 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000198659 980__ $$aARTICLE