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dc.contributor.authorShroyer, Emily L.
dc.contributor.authorPadman, L.
dc.contributor.authorSamelson, R. M.
dc.contributor.authorMunchow, A.
dc.contributor.authorStearns, Leigh A.
dc.date.accessioned2017-04-14T20:41:55Z
dc.date.available2017-04-14T20:41:55Z
dc.date.issued2017-02-02
dc.identifier.citationSHROYER, E. L., L. PADMAN, R. M. SAMELSON, A. MÜNCHOW, and L. A. STEARNS. "Seasonal Control of Petermann Gletscher Ice-shelf Melt by the Ocean's Response to Sea-ice Cover in Nares Strait." Journal of Glaciology 63.238 (2017): 324-30.en_US
dc.identifier.urihttp://hdl.handle.net/1808/23713
dc.description.abstractPetermann Gletscher drains ~4% of the Greenland ice sheet (GrIS) area, with ~80% of its mass loss occurring by basal melting of its ice shelf. We use a high-resolution coupled ocean and sea-ice model with a thermodynamic glacial ice shelf to diagnose ocean-controlled seasonality in basal melting of the Petermann ice shelf. Basal melt rates increase by ~20% in summer due to a seasonal shift in ocean circulation within Nares Strait that is associated with the transition from landfast sea ice to mobile sea ice. Under landfast ice, cold near-surface waters are maintained on the eastern side of the strait and within Petermann Fjord, reducing basal melt and insulating the ice shelf. Under mobile sea ice, warm waters are upwelled on the eastern side of the strait and, mediated by local instabilities and eddies, enter Petermann Fjord, enhancing basal melt down to depths of 200 m. The transition between these states occurs rapidly, and seasonal changes within Nares Strait are conveyed into the fjord within the same season. These results suggest that long-term changes in the length of the landfast sea-ice season will substantially alter the structure of Petermann ice shelf and its contribution to GrIS mass loss.en_US
dc.publisherCambridge University Pressen_US
dc.rightsThis is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectBasal melt ice shelfen_US
dc.subjectLandfast sea iceen_US
dc.subjectNares straiten_US
dc.subjectOcean/glacier interactionsen_US
dc.subjectOcean/ice interactionsen_US
dc.subjectPetermann gletscheren_US
dc.subjectSea-ice archingen_US
dc.titleSeasonal control of Petermann Gletscher ice-shelf melt by the ocean's response to sea-ice cover in Nares Straiten_US
dc.typeArticleen_US
kusw.kuauthorStearns, Leigh A.
kusw.kudepartmentGeologyen_US
dc.identifier.doi10.1017/jog.2016.140en_US
kusw.oaversionScholarly/refereed, author accepted manuscripten_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US
dc.rights.accessrightsopenAccess


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This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's license is described as: This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.