Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/5744
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dc.contributor.authorallVichi, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.authorallColuccelli, A.; UniPoliMaen
dc.contributor.authorallRavaioli, F.; CNR-ISMARen
dc.contributor.authorallGiglio, F.; CNR-ISMARen
dc.contributor.authorallLangone, L.; CNR-ISMARen
dc.contributor.authorallAzzaro, M.; CNR-IAMCen
dc.contributor.authorallAzzaro, F.; CNR-IAMCen
dc.contributor.authorallLa Ferla, R.; CNR-IAMCen
dc.contributor.authorallCatalano, G.; CNR-ISMARen
dc.contributor.authorallCozzi, S.; CNR-ISMARen
dc.date.accessioned2010-01-21T16:17:16Zen
dc.date.available2010-01-21T16:17:16Zen
dc.date.issued2009en
dc.identifier.urihttp://hdl.handle.net/2122/5744en
dc.description.abstractSeveral biogeochemical data have been collected in the last 10 years of Italian activity in Antarctica (ABIOCLEAR, ROSSMIZE, BIOSESO-I/II). A comprehensive 1-D biogeochemical model was implemented as a tool to link observations with processes and to investigate the mechanisms that regulate the flux of biogenic material through the water column. The model is ideally located at station B (175° E–74° S) and was set up to reproduce the seasonal cycle of phytoplankton and organic matter fluxes as forced by the dominant water column physics over the period 1990–2001. Austral spring-summer bloom conditions are assessed by comparing simulated nutrient drawdown, primary production rates, bacterial respiration and biomass with the available observations. The simulated biogenic fluxes of carbon, nitrogen and silica have been compared with the fluxes derived from sediment traps data. The model reproduces the observed magnitude of the biogenic fluxes, especially those found in the bottom sediment trap, but the peaks are markedly delayed in time. Sensitivity experiments have shown that the characterization of detritus, the choice of the sinking velocity and the degradation rates are crucial for the timing and magnitude of the vertical fluxes. An increase of velocity leads to a shift towards observation but also to an overestimation of the deposition flux which can be counteracted by higher bacterial remineralization rates. Model results suggest that the timing of the observed fluxes depends first and foremost on the timing of surface production and on a combination of size-distribution and quality of the autochtonous biogenic material. It is hypothesized that the bottom sediment trap collects material originated from the rapid sinking of freshly-produced particles and also from the previous year's production period.en
dc.description.sponsorshipItalian FISR Project VECTORen
dc.language.isoEnglishen
dc.publisher.nameCopernicus Publications on behalf of the European Geosciences Unionen
dc.relation.ispartofOcean Science Discussen
dc.relation.ispartofseries/6(2009)en
dc.subjectnumerical modelen
dc.subjectBFMen
dc.subjectAntarcticaen
dc.subjectRoss Seaen
dc.subjectbiogeochemical modelen
dc.titleModelling approach to the assessment of biogenic fluxes at a selected Ross Sea site, Antarcticaen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber1477-1512en
dc.identifier.URLhttp://www.ocean-sci-discuss.net/6/1477/2009en
dc.subject.INGV02. Cryosphere::02.04. Sea ice::02.04.01. Atmosphere/sea ice/ocean interactionen
dc.subject.INGV03. Hydrosphere::03.01. General::03.01.01. Analytical and numerical modelingen
dc.subject.INGV03. Hydrosphere::03.04. Chemical and biological::03.04.01. Biogeochemical cyclesen
dc.subject.INGV03. Hydrosphere::03.04. Chemical and biological::03.04.02. Carbon cyclingen
dc.subject.INGV03. Hydrosphere::03.04. Chemical and biological::03.04.04. Ecosystemsen
dc.description.obiettivoSpecifico3.7. Dinamica del clima e dell'oceanoen
dc.description.journalTypeN/A or not JCRen
dc.description.fulltextopenen
dc.contributor.authorVichi, M.en
dc.contributor.authorColuccelli, A.en
dc.contributor.authorRavaioli, F.en
dc.contributor.authorGiglio, F.en
dc.contributor.authorLangone, L.en
dc.contributor.authorAzzaro, M.en
dc.contributor.authorAzzaro, F.en
dc.contributor.authorLa Ferla, R.en
dc.contributor.authorCatalano, G.en
dc.contributor.authorCozzi, S.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.contributor.departmentUniPoliMaen
dc.contributor.departmentCNR-ISMARen
dc.contributor.departmentCNR-ISMARen
dc.contributor.departmentCNR-IAMCen
dc.contributor.departmentCNR-IAMCen
dc.contributor.departmentCNR-IAMCen
dc.contributor.departmentCNR-ISMARen
dc.contributor.departmentCNR-ISMARen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.deptCNR-ISMAR-
crisitem.author.deptCNR-ISMAR-
crisitem.author.deptCNR-IAMC-
crisitem.author.deptCNR-IAMC-
crisitem.author.deptCNR-IAMC-
crisitem.author.deptCNR-ISMAR-
crisitem.author.deptCNR-ISMAR-
crisitem.author.orcid0000-0002-2634-2899-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent02. Cryosphere-
crisitem.classification.parent03. Hydrosphere-
crisitem.classification.parent03. Hydrosphere-
crisitem.classification.parent03. Hydrosphere-
crisitem.classification.parent03. Hydrosphere-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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