Show simple item record

dc.contributor.authorBianchi, A.
dc.contributor.authorBianucci, L.
dc.contributor.authorPiola, A.
dc.contributor.authorPino, D.
dc.contributor.authorSchloss, I.
dc.contributor.authorPoisson, A.
dc.contributor.authorBalestrini, C.
dc.date.accessioned2020-06-10T15:11:47Z
dc.date.available2020-06-10T15:11:47Z
dc.date.issued2005
dc.identifier.doihttps://doi.org/10.1029/2004JC002488.
dc.identifier.urihttp://hdl.handle.net/1834/17169
dc.description.abstractThe thermohaline structure across the tidal fronts of the continental shelf off Patagonia is analyzed using historical and recent summer hydrographic sections. The near-summer tidal front location is determined on the basis of the magnitude of vertical stratification of the water column as measured by the Simpson parameter. Sea surface and air CO2 partial pressures based on data from eleven transects collected in summer and fall from 2000 to 2004 are used to estimate CO2 fluxes over the shelf. The near-shore waters are a source of CO2 to the atmosphere while the midshelf region is a CO2 sink. The transition between source and sink regions closely follows the location of tidal fronts, suggesting a link between vertical stratification of the water column and the regional CO2 balance. The highest surface values of Chl a are associated with the strongest CO2 sinks. The colocation of lowest CO2 partial pressure (pCO2) and highest Chl a suggests that phytoplankton blooms on the stratified side of the fronts draw the ocean's CO2 to very low levels. The mean shelf sea-air difference in pCO2 (ΔpCO2) is −24 μatm and rises to −29 μatm if the shelf break front is included. Peaks in ΔpCO2 of −110 μatm, among the highest observed in the global ocean, are observed. The estimated summer mean CO2 flux over the shelf is −4.4 mmol m−2 d−1 and rises to −5.7 mmol m−2 d−1 when the shelf break area is taken into account. Thus, during the warm season the shelf off Patagonia is a significant atmospheric CO2 sink.en_US
dc.language.isoenen_US
dc.titleVertical stratification and air-sea CO2 fluxes in the Patagonian shelfen_US
dc.typeJournal Contributionen_US
dc.bibliographicCitation.issue7en_US
dc.bibliographicCitation.titleJournal of Geophysical Research C: Oceansen_US
dc.bibliographicCitation.volume110en_US
dc.description.statusPublisheden_US
dc.format.pagerangepp.1-10en_US
dc.type.refereedRefereeden_US
refterms.dateFOA2021-01-30T18:47:52Z


Files in this item

Thumbnail
Name:
SolicitarDocumento.pdf
Size:
302.3Kb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record