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dc.contributor.authorBarras, Vaughan J. I.en_US
dc.contributor.authorSIMMONDS, IANen_US
dc.date.accessioned2014-05-22T06:58:40Z
dc.date.available2014-05-22T06:58:40Z
dc.date.issued2008en_US
dc.identifier.citationBarras, V. J. I. & Simmonds, I. (2008). Synoptic controls upon δ18O in southern Tasmanian precipitation. Geophysical Research Letters, 35, doi: 10.1029/2007GL031835.en_US
dc.identifier.issn1944–8007en_US
dc.identifier.urihttp://hdl.handle.net/11343/32756
dc.description© 2008 American Geophysical Unionen_US
dc.description.abstractAn event-based record of 18 O in precipitation at Margate in Tasmania, Australia, was analysed using 3d Lagrangian trajectories and composites of ERA40 850hPa geopotential height for the years 1994 - 2002. Trajectory analysis found that moisture entrainment occurs during the 48 hour period prior to arrival for all precipitating air masses at Margate. The rate of entrainment was greatest for events of high rainfall/high depletion, contributing up to 19% of vapour in the air mass in summer and up to 47% in winter. The majority of air masses were found to be advected from the Southern Ocean, however, for high rainfall/high depletion events during summer 30% of air masses were found to approach from the Tasman Sea (east of 155E longitude). Mean isotope ratios were less depleted by 1.4‰ for these events indicating mixing with less depleted air. High rainfall/high depletion events were also associated with negative geopotential anomalies east of Tasmania.en_US
dc.languageengen_US
dc.publisherAmerican Geophysical Unionen_US
dc.subjectisotopeen_US
dc.subjecttrajectoriesen_US
dc.subjectTasmaniaen_US
dc.titleSynoptic controls upon δ18O in southern Tasmanian precipitationen_US
dc.typeJournal Articleen_US
melbourne.peerreviewPeer Revieweden_US
melbourne.affiliationThe University of Melbourneen_US
melbourne.affiliation.departmentScience - Earth Sciencesen_US
melbourne.publication.statusPublisheden_US
melbourne.source.titleGeophysical Research Lettersen_US
melbourne.source.volume35en_US
melbourne.elementsidNA
melbourne.contributor.authorSimmonds, Ian
melbourne.accessrightsOpen Access


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