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dc.contributor.authorSutherland, David A.  Concept link
dc.contributor.authorStraneo, Fiamma  Concept link
dc.contributor.authorPickart, Robert S.  Concept link
dc.date.accessioned2014-09-22T19:11:20Z
dc.date.available2014-12-16T10:00:03Z
dc.date.issued2014-06-16
dc.identifier.citationJournal of Geophysical Research: Oceans 119 (2014): 3767–3791en_US
dc.identifier.urihttps://hdl.handle.net/1912/6860
dc.descriptionAuthor Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 119 (2014): 3767–3791, doi:10.1002/2013JC009786.en_US
dc.description.abstractThe circulation regimes of two major outlet glacial fjords in southeastern Greenland, Sermilik Fjord (SF) and Kangerdlugssuaq Fjord (KF), are investigated using data collected in summer 2009. The two fjords show similar flow patterns, with a time-dependent, vertically sheared flow structure dominating over the background estuarine flow driven by buoyancy input. We show that this time-dependent flow is consistent with circulation induced by density interface fluctuations at the fjord mouth, often referred to as intermediary circulation. One difference between the fjords is that the hydrographic and velocity structure below a surface modified layer is found to be three layer in KF in summer, compared to two layer in SF. Outside each fjord, large-scale geostrophic currents dictate the stratification at the mouth, although the way in which these large-scale flows impinge on each fjord is distinct. Combining the observations with estimates from existing theories, we find the magnitudes of the estuarine (Qe) and intermediary (Qi) circulation and show that Qi >> Qe, although along-fjord winds can also be significant. We expect that the critical parameter determining Qi/Qe is the sill depth compared to the fjord depth, with shallower sills corresponding to weaker intermediary circulation. Finally, we discuss the implications of strong intermediary circulation on calculating heat transport to the glacier face and its potential feedbacks on the background circulation in these highly stratified estuaries.en_US
dc.description.sponsorshipFunding for this work came from National Science Foundation OPP grant 0909373 and OCE grants 1130008 (D.A.S. and F.S.) and 0959381 (R.P.), and the WHOI Arctic Research Initiative (FS).en_US
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.format.mimetypeapplication/postscript
dc.language.isoen_USen_US
dc.publisherJohn Wiley & Sonsen_US
dc.relation.urihttps://doi.org/10.1002/2013JC009786
dc.subjectGreenlanden_US
dc.subjectFjord circulationen_US
dc.subjectEstuarine circulationen_US
dc.subjectIntermediary circulationen_US
dc.subjectMeltwateren_US
dc.subjectEast Greenland Currenten_US
dc.subjectAtlantic Wateren_US
dc.subjectGlaciersen_US
dc.titleCharacteristics and dynamics of two major Greenland glacial fjordsen_US
dc.typeArticleen_US
dc.description.embargo2014-12-16en_US
dc.identifier.doi10.1002/2013JC009786


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