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dc.contributor.authorNicholls, Keith W.eng
dc.contributor.authorØsterhus, Sveineng
dc.date.accessioned2004-08-10T12:38:56Z
dc.date.accessioned2004-08-26T11:57:33Z
dc.date.available2004-08-10T12:38:56Z
dc.date.available2004-08-26T11:57:33Z
dc.date.issued2004-04-20eng
dc.identifier.issn0148-0227eng
dc.identifier.urihttp://hdl.handle.net/1956/372
dc.description.abstractMultiyear time series of ocean current and temperatures from beneath Filchner-Ronne Ice Shelf, Antarctica, demonstrate both seasonal and interannual variability. The seasonal signal is visible at all measurement sites, although it was swamped for a 2-year period (1999–2001) when extraordinarily light sea-ice cover in the southern Weddell Sea during the 1997–1998 Austral summer caused an anomalously large pulse of High Salinity Shelf Water to flush beneath the ice shelf. The pulse was observed twice at an instrumented site near the Berkner Island coast, once on its way to the Filchner Depression and once after the signal had propagated around the depression and returned to the site as an anomalously large pulse of Ice Shelf Water. The timings of the signal allow an estimate of 24–30 months for the flushing timescales of the sub-ice shelf ocean cavity, indicating that the cavity is highly responsive to external forcing. A timescale for the full ventilation of the cavity of 4–5 years is obtained from the length of time the sub-ice shelf conditions take to return to their original state, a timescale significantly shorter than previous estimates.en
dc.format.extent38782 byteseng
dc.format.extent137 byteseng
dc.format.extent1151035 byteseng
dc.format.mimetypetext/plaineng
dc.format.mimetypetext/plaineng
dc.format.mimetypeapplication/pdfeng
dc.language.isoengeng
dc.publisherAmerican Geophysical Unioneng
dc.titleInterannual variability and ventilation timescales in the ocean cavity beneath Filchner-Ronne Ice Shelf, Antarcticaeng
dc.typeJournal articleeng
dc.rights.holderCopyright 2004 the American Geophysical Union
dc.type.versionpublishedVersioneng
bora.peerreviewedPeer reviewedeng
bora.journalTitleJournal of Geophysical Researcheng
bibo.volume109eng
bora.cristinID420748eng
bibo.numberC04014eng
bibo.doihttp://dx.doi.org/10.1029/2003JC002149eng
dc.identifier.cristinID420748eng
dc.identifier.doihttp://dx.doi.org/10.1029/2003JC002149


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