Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/27163
Share/Export:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Title

Air-Sea CO2 fluxes in the Atlantic as measured during boreal spring and autumn

AuthorsPadín, X. A. CSIC ORCID; Vázquez Rodríguez, Marcos CSIC; Castaño, Mónica CSIC; Velo, A. CSIC ORCID ; Alonso Pérez, Fernando CSIC ORCID; Gago, Jesús CSIC ORCID CVN; Gilcoto, Miguel CSIC ORCID CVN ; Álvarez, Marta; Pardo, Paula C. CSIC ORCID; Paz, M. de la CSIC ORCID; Ríos, Aida F. CSIC; Pérez, Fiz F. CSIC ORCID CVN
Issue DateMay-2010
PublisherCopernicus Publications
CitationBiogeosciences 7(5): 1587-1606 (2010)
AbstractA total of fourteen hydrographic cruises from 2000 to 2008 were conducted during the spring and autumn seasons between Spain and the Southern Ocean under the framework of the Spanish research project FICARAM. The underway measurements were processed and analysed to describe the meridional air-sea CO2 fluxes (FCO2) in the covered sector of the Atlantic Ocean. The data has been grouped into different biogeochemical oceanographic provinces based on thermohaline characteristics. The spatial and temporal distributions of FCO2 followed expected distributions and annual trends reproducing the recent climatological ΔfCO2 estimations with a mean difference of −3 ± 18 μatm (Takahashi et al., 2009). The reduction in the CO2 saturation along the meridional FICARAM cruises represented an increase of 0.02 ± 0.14 mol m−2 yr−1 in the ocean uptake of atmospheric CO2. The subtropical waters in both Hemispheres acted as a sink of atmospheric CO2 during the successive spring seasons and as a source in autumn. The coarse reduction of the ocean uptake of atmospheric CO2 observed in the North Atlantic Ocean was linked to conditions of negative phase of the North Atlantic Oscillation that prevailed during the FICARAM period. Surface waters in the North Equatorial Counter Current revealed a significant long-term decrease of sea surface salinity of −0.16 ± 0.01 yr−1 coinciding with a declination of −3.5 ± 0.9 μatm yr−1 in the air–sea disequilibrium of CO2 fugacity and a rise of oceanic CO2 uptake of −0.09 ± 0.03 mol m−2 yr−1. The largest CO2 source was located in the equatorial upwelling system. These tropical waters that reached emissions of 0.7 ± 0.5 and 1.0 ± 0.7 mol m−2 y−1 in spring and autumn, respectively, showed an interannual warming of 0.11 ± 0.03 °C yr−1 and a wind speed decrease of −0.58 ± 0.14 m s−1 yr−1 in spring cruises which suggest the weakening of upwelling events associated with warm El Niño – Southern Oscillation episodes. Contrary the surface waters of the Patagonian Sea behaved as an intense sink of CO2 in March and November. The oceanic waters of the convergence of Falkland and Brazil Currents showed the strongest CO2 absorption with a rate of −5.4 ± 3.6 mol m−2 yr−1 in November. The Southern Oceans sampled in the Drake Passage behave as an average uptake rate of −1.1 ± 0.9 mol m−2 yr−1 while the distal shelf of the Livingston Island acted as a slight source of CO2 to the atmosphere.
Description20 páginas, 4 figuras, 4 tablas.
Publisher version (URL)http://dx.doi.org/10.5194/bg-7-1587-2010
URIhttp://hdl.handle.net/10261/27163
DOI10.5194/bg-7-1587-2010
ISSN1726-4170
Appears in Collections:(IMEDEA) Artículos
(IIM) Artículos




Files in This Item:
File Description SizeFormat
bg-7-1587-2010.pdf9,56 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work

SCOPUSTM   
Citations

25
checked on May 26, 2022

WEB OF SCIENCETM
Citations

26
checked on May 23, 2022

Page view(s)

513
checked on May 27, 2022

Download(s)

220
checked on May 27, 2022

Google ScholarTM

Check

Altmetric

Dimensions


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.