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dc.contributor.authorGabric, AJ
dc.contributor.authorCropp, R
dc.contributor.authorHirst, T
dc.contributor.authorMarchant, H
dc.contributor.editorH Rodhe
dc.date.accessioned2018-01-11T01:54:46Z
dc.date.available2018-01-11T01:54:46Z
dc.date.issued2003
dc.date.modified2009-08-27T06:52:43Z
dc.identifier.issn0280-6509
dc.identifier.doi10.1034/j.1600-0889.2003.00077.x
dc.identifier.urihttp://hdl.handle.net/10072/6095
dc.description.abstractDimethyl sulfide (DMS) is a radiatively active trace gas produced by enzymatic cleavage of its precursor compound, dimethyl sulfoniopropionate (DMSP), which is released by marine phytoplankton in the upper ocean. Once ventilated to the atmosphere, DMS is oxidised to form non-sea-salt sulfate and methane sulfonate (MSA) aerosols, which are a major source of cloud condensation nuclei (CCN) in remote marine air and may thus play a role in climate regulation. Here we simulate the change in DMS flux in the Eastern Antarctic ocean from 1960-2086, corresponding to equivalent CO2 tripling relative to pre-industrial levels. Calibration to contemporary climate conditions was carried out using a genetic algorithm to fit the model to surface chlorophyll from the 4-yr SeaWiFs satellite archive and surface DMS from an existing global database. Following the methodology used previously in the Subantarctic Southern Ocean, we then simulated DMS emissions under enhanced greenhouse conditions by forcing the DMS model with output from a coupled atmospheric-ocean general circulation model (GCM). The GCM was run in transient mode under the IPCC/IS92a radiative forcing scenario. By 2086, the change simulated in annual integrated DMS flux is around 20% in ice-free waters, with a greater increase of 45% in the seasonal ice zone (SIZ). Interestingly, the large increase in flux in the SIZ is not due to higher in situ production but mainly because of a loss of ice cover during summer-autumn and an increase in sea-to-air ventilation of DMS. These proportional changes in areal mean flux (25%) are much higher than previously estimated for the Subantarctic Southern Ocean (5%), and point to the possibility of a significant DMS-climate feedback at high Southern latitudes. Due to the nexus between ice cover and food-web structure, the potential for ecological community shifts under enhanced greenhouse conditions is high, and the implications for DMS production are discussed.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherBlackwell Munksgaard
dc.publisher.placeDenmark
dc.relation.ispartofpagefrom966
dc.relation.ispartofpageto981
dc.relation.ispartofjournalTellus, Series B: Chemical and Physical Meteorology
dc.relation.ispartofvolume55B
dc.subject.fieldofresearchAtmospheric Sciences
dc.subject.fieldofresearchEnvironmental Science and Management
dc.subject.fieldofresearchcode0401
dc.subject.fieldofresearchcode0502
dc.titleThe sensitivity of dimethyl sulfide production to simulated climate change in the Eastern Antarctic Southern Ocean
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionVersion of Record (VoR)
gro.facultyGriffith Sciences, Griffith School of Environment
gro.rights.copyright© 2003 Blackwell Publishing. The definitive version is available at [www.blackwell-synergy.com.]
gro.date.issued2003
gro.hasfulltextFull Text
gro.griffith.authorGabric, Albert J.
gro.griffith.authorCropp, Roger A.


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