Dissolved inorganic carbon budgets in the eastern subpolar North Atlantic in the 2000s from in situ data

• Published in: Geophysical Research Letters
• Main Authors: Zunino, P., Lherminier, Pascale, Mercier, Herlé, Padín, X. A., Ríos, Aida F., Pérez, Fiz F.
• Other Authors: European Commission, Ministerio de Economía y Competitividad (España)
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Geophysical Union 2015
• Subjects: Las Palmas; Zunino; North Atlantic
• Online Access: http://hdl.handle.net/10261/128760; https://doi.org/10.1002/2015GL066243; https://doi.org/10.13039/501100000780; https://doi.org/10.13039/501100003329

9 páginas, 1 tabla, 2 figuras.-- Proyecto Carbochange.-- The OVIDE data analyzed in this study are available at the CLIVAR and Carbon Hydrographic Data Office (http://cchdo.ucsd.edu/search?q=Ovide) and at the Carbon Dioxide Information Analysis Center (http://cdiac.ornl.gov/oceans/RepeatSections/clivar_ovide.html). The climatology of Takahashi et al. was downloaded from http://www.ldeo.columbia.edu/res/pi/CO2/carbondioxide/pages/air_sea_flux_2000.html The subpolar North Atlantic (SPNA) is important in the global carbon cycle because of the deep water ventilation processes that lead to both high uptake of atmospheric CO2 and large inventories of anthropogenic CO2 (Cant). Thus, it is crucial to understand its response to increasing anthropogenic pressures. In this work, the budgets of dissolved inorganic carbon (DIC), Cant and natural DIC (DICnat) in the eastern SPNA in the 2000s, are jointly analyzed using in situ data. The DICnat budget is found to be in steady state, confirming a long-standing hypothesis from in situ data for the first time. The biological activity is driving the uptake of natural CO2 from the atmosphere. The Cant increase in the ocean is solely responsible of the DIC storage rate which is explained by advection of Cant from the subtropics (65%) and Cant air-sea flux (35%). These results demonstrate that the Cant is accumulating in the SPNA without affecting the natural carbon cycle This work is a contribution to the EU FP7 CARBOCHANGE project (264879) and the ANR GEOVIDE project (http://www.agence-nationale-recherche.fr/?Project=ANR-13-BS06-0014). For this work P. Zunino was funded by CARBOCHANGE and GEOVIDE projects as well as by IFREMER. The Tricontinental Atlantic Campus funded a 6 months contract for the first author at the Universidad de Las Palmas de Gran Canaria where part of this paper was written. P. Lherminier was supported by IFREMER, H. Mercier by the CNRS and the ATLANTOS GA 633211 H2020 project, and A. Padin by the Consejo Superior de Investigaciones Científicas (CSIC). A.F. ...