Greenland ice sheet melt from MODIS and associated atmospheric variability

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dc.contributor.authorHäkkinen, Sirpa
dc.contributor.authorHall, Dorothy K.
dc.contributor.authorShuman, Christopher
dc.contributor.authorWorthen, Denise L.
dc.contributor.authorDiGirolamo, Nicolo E.
dc.date.accessioned2022-02-15T13:55:34Z
dc.date.available2022-02-15T13:55:34Z
dc.date.issued2014-02-12
dc.description.abstractDaily June-July melt fraction variations over the Greenland ice sheet (GIS) derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) (2000–2013) are associated with atmospheric blocking forming an omega-shape ridge over the GIS at 500 hPa height. Blocking activity with a range of time scales, from synoptic waves breaking poleward (<5 days) to full-fledged blocks (≥5 days), brings warm subtropical air masses over the GIS controlling daily surface temperatures and melt. The temperature anomaly of these subtropical air mass intrusions is also important for melting. Based on the years with the greatest melt (2002 and 2012) during the MODIS era, the area-average temperature anomaly of 2 standard deviations above the 14 year June-July mean results in a melt fraction of 40% or more. Though the summer of 2007 had the most blocking days, atmospheric temperature anomalies were too small to instigate extreme melting.en_US
dc.description.sponsorshipWe thank the NASA CryosphericSciences Program and the NASAPhysical Oceanography Program forsupport. We are grateful for the con-structive comments by Son Nghiem andone anonymous reviewer and by theEditor, Julienne Stroeve.The Editor thanks Xuanji Wang and ananonymous reviewer for their assis-tance in evaluating this paper.en_US
dc.description.urihttps://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1002/2013GL059185en_US
dc.format.extent8 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2rcif-9oo9
dc.identifier.citationHäkkinen, S., Hall, D. K., Shuman, C. A., Worthen, D. L., and DiGirolamo, N. E. (2014), Greenland ice sheet melt from MODIS and associated atmospheric variability, Geophys. Res. Lett., 41, 1600– 1607, doi:10.1002/2013GL059185.en_US
dc.identifier.urihttp://dx.doi.org/10.1002/2013GL059185
dc.identifier.urihttp://hdl.handle.net/11603/24274
dc.language.isoen_USen_US
dc.publisherAGUen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleGreenland ice sheet melt from MODIS and associated atmospheric variabilityen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0001-9606-767Xen_US

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