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Parard, Gaëlle; Lefèvre, Nathalie; Boutin, Jacqueline (2011)
Publisher: Tellus B
Journal: Tellus B
Languages: English
Types: Article
Subjects:
In order to better understand the variability of surface CO2 in the Tropical Atlantic, a CARIOCA sensor has been installed on a PIRATA mooring at 6°S, 10°W in June 2006. The fugacity of CO2 (fCO2) is recorded hourly from 7 June 2006 to 30 October 2009 with two important data gaps. From July to September, an upwelling develops and a decrease in sea surface temperature (SST) is observed, associated with an fCO2 increase. However, the highest fCO2 is observed in October, after the upwelling season, due to the warming of surface waters. The region is a net source of CO2 to the atmosphere of 2.10 ± 0.69 mol m-2 yr-1 in 2007. The monthly flux is maximum (3.21 ± 0.8 mol m-2 yr-1) in November (averaged over 2006 and 2008). High frequency variability is observed throughout the time series but is particularly pronounced after the upwelling season. Biological and thermodynamic processes explain the diurnal variability. Dissolved inorganic carbon (DIC) is calculated from (alkalinity) TA and fCO2 using an empirical TA—salinity relationship determined for the eastern equatorial Atlantic. Net community production (NCP) is calculated from DIC daily changes and ranges from 9 to 41 mmol m-2 d-1, which is consistent with previous measurements in this region.DOI: 10.1111/j.1600-0889.2010.00503.x
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    • Andrie´, C., Oudot, C., Genthon, C. and Merlivat, L. 1986. CO2 fluxes in the tropical Atlantic during FOCAL cruises. J. Geophys. Res. 91, 11741-11755.
    • Astor, Y., Muller-Karger, F. and Scranton, M. I. 2003. Seasonal and interannual variation in the hydrography of the Cariaco Basin: implications for basin ventilation. Continental Shelf Res. 23, 125-144.
    • Astor, Y. M., Scranton, M. I., Muller-Karger, F., Bohrer, R. and Garcia, J. 2005. fCO2 variability at the CARIACO tropical coastal upwelling Time Series Station. Mar. Chem. 97, 245-261.
    • Bakker, D. C., Echeto, J., Boutin, J. and Merlivat, L. 2001. Variability of surface water fCO2 during seasonal upwelling in the equatorial Atlantic Ocean as observed by a drifting buoy. J. Geophys. Res. 106, 9241-9253.
    • Bakker, D. C. E., de Baar, H. J. W. and de Jong, E. 1999. The dependence on temperature and salinity of dissolved inorganic carbon in East Atlantic surface waters. Mar. Chem. 65, 263-280.
    • Bakun, A. 1978. Guinea Current upwelling. Nature 271, 147-150.
    • Bates, N. R., Michaels, A. F. and Knap, A. H. 1996. Seasonal and interannual variability of oceanic carbon dioxide species at the US JGOFS Bermuda Atlantic Time-series Study (BATS) site. Deep Sea Res. Part II: Topical Stud. Oceanogr. 43, 347-383.
    • Bates, N. R., Takahashi, T., Chipman, D. W. and Knap, A. H. 1998. Variability of pCO2 on diel to seasonal timescales in the Sargasso Sea near Bermuda. . Geophys. Res. 103, 15567-15585.
    • Bates, N. R., Merlivat, L., Beaumont, L. and Pequignet, C. A. 2000. Intercomparison of shipboard and moored CARIOCA buoy seawater fCO2 measurement in Saragossa Sea. Mar. Chem. 72, 239-255.
    • Bindoff, N. L., Willebrand, J., Artale, V., Cazenave, A., Gregory, J. and co-authors. 2007. Observations: oceanic climate change and sea level. In: Climate Change: The Physical Science Basis. Contribution of working group 1 to the Fourth Assessment Report of the Intergouvernmental Panel on Climate Change (eds S. Solomon, D. Quin, M. Manning, Z. Chen, M. Marquis and co-authors), Cambridge Univeristy Press, Cambridge, United Kingdom and New York, NY, USA, 385-432.
    • Bourle`s, B., Lumpkin, R., Phaden, M. M., Hernandez, F., Nobre, P. and co-authors. 2008. THE PIRATA PROGRAM: history, Accomplishments, and Future Directions. Bull. Am. Meteorol. Soc. 89, 1111-1125.
    • Boutin, J. and Merlivat, L. 2009. New in situ estimates of carbon biological production rates in the Southern Ocean from CARIOCA drifter measurements. Geophys. Res. Lett. 36, 1-6.
    • Boyer Monte´gut, C., Madec, G., Fischer, A. S., Lazar, A. and Ludicone, D. 2004. Mixed layer depth over the global ocean: an examination of profile data and a profile-based climatology. J. Geophys. Res. 109, C12003, doi: 10.1029/2004JC002378.
    • Byrne, R. H., Degrandpre, M. D., Short, R. T., Martz, T. R., Merlivat, L. and co-authors. 2009. Sensors and systems for in situ observations of marine CO2 system variables. In: Proceedings of the OceanObs09, Venice, Italy, September 21-25, 2009. Available at: http://www.oceanobs09.net/.
    • Chavez, F. P., Pennington, T. J., Herlien, R., Jannasch, J. H., Thurmond, G. and co-authors. 1997. Moorings and drifters for real-time interdisciplinary oceanography. Am. Meteorol. Soc. 14, 1199-1211.
    • Copin-Monte´gut, C., Be´govic, M. and Merlivat, L. 2004. Variability of the partial pressure of CO2 on diel to annual time scales in the Northwestern Mediterranean Sea. Mar. Chem. 85, 169-189.
    • Dickson, A. and Millero, F. 1987. A comparison of the equilibrium constants for the dissociation of carbonic acid in seawater media. Deep Sea Res. Part A. Oceanogr. Res. Papers 34, 1733-1743.
    • Dufour, P. and Stretta, J. M. 1973. Production primaire, biomasse du phytoplancton et du zooplancton dans l'Atlantique tropical sud, le long du me´ridien 4◦W. Ser. Oce´anogr. 11, 419- 429.
    • Gonza´lez-Da´vila, M., Santana-Casiano, J. M., Rueda, M. J., Llina´s, O. and Gonza´lez-Da´vila, E. F. 2003. Seasonal and interannual variability of sea-surface carbon dioxide species at the European Station for Time Series in the Ocean at the Canary Islands (ESTOC) between 1996 and 2000. Global Biogeochem. Cycles 17, 1076.
    • Hazeleger, W., de Vries, P. and Friocourt, Y. 2003. Sources of the equatorial undercurrent in the Atlantic in a high-resolution ocean model. J. Phys. Oceanogr. 33, 677-693.
    • Hood, E. M. and Merlivat, L. 2001. Annual to interannual variations of fCO2 in the northwestern Mediterranean Sea: high frequency time series data from CARIOCA buoys (1995-1997). J. Mar. Res. 59, 113-131.
    • Koffi, U., Lefe`vre, N., Kouadio, G. and Boutin, J. 2010. Surface CO2 parameters and air-sea CO2 flux distribution in the eastern equatorial Atlantic. J. Mar. Syst. 82, 135-144.
    • Ko¨rtzinger, A. 2003. A significant CO2 sink in the tropical Atlantic Ocean associated with the Amazon River plume. Geophys. Res. Lett. 30, 2287.
    • Ko¨rtzinger, A., Send, U., Wallace, D. W. R., Karstensen, J. and DeGrandpre, M. 2008. Seasonal cycle of O2 and pCO2 in the central Labrador Sea: atmospheric, biological, and physical implications. Global Biogeochem. Cycles 22, 1-16.
    • Lefe`vre, N. 2009. Low CO2 concentrations in the Gulf of Guinea during the upwelling season in 2006. Mar. Chem. 113, 93-101.
    • Lefe`vre, N., Ciabini, J. P., Michard, G., Briest, B., Duchaffaut, M. and co-authors. 1993. A new optical sensor for pCO2 measurement. Mar. Chem. 42, 189-198.
    • Lefe`vre, N., Moore, G., Aiken, J., Watson, A. and Cooper, D. 1998. Variability of pCO2 in tropical Atlantic in 1995. J. Geophys. Res. 103, 5623-5634.
    • Lefe`vre, N., Guillot, A., Beaumont, L. and Danguy, T. 2008. Variability of fCO2 in the Eastern Tropical Atlantic from a moored buoy. J. Geophys. Res. 113, 1-12.
    • Lefe`vre, N., Diverres, D. and Gallois, F. 2010. Origin of CO2 undersaturations in the western tropical Atlantic. Tellus B, doi: 10.1111/j.1600- 0889.2010.00475.x.
    • Leinweber, A., Gruber, N., Fenzel, H., Friedeich, G. E. and Chavez, F. P. 2009. Diurnal carbon cycling in the surface ocean and lower atmosphere of Santa Monica Bay, California. Geophys. Res. Lett. 36, 1-5.
    • Merbach, C., Culberson, C. H. and Hawley, J. E. 1973. Measurements of the apparent dissociation constants of carbonic acid in seawater of atmospheric pressure. Lymnol. Oceanogr. 18, 897-907.
    • Merlivat, L., Davila, M., Caniaux, G. and Boutin, J. 2009. Mesoscale and diel to monthly variability of CO2 and carbon fluxes at the ocean surface in the northeastern Atlantic. J. Geophys. Res.-Oceans 114, 1-17.
    • Oudot, C., Ternon, J. and Lecomte, J. 1995. Measurements of atmospheric and oceanic CO2 in the tropical Atlantic: 10 years after the 1982-1984 FOCAL cruises. Tellus 47B, 70-85.
    • Sayles, F. L. and Eck, C. 2009. An autonomous instrument for time series analysis of TCO2 from oceanographic moorings. Deep Sea Res. Part I: Oceanogr. Res. Papers 56, 1590-1603.
    • Send, U., Weller, R., Wallace, D., Chavez, F., Lampitt, R. and co-authors. 2009. OceanSITES. In: Proceedings of the OceanObs09, Venice, Italy, September 21-25, 2009. Available at: http://www.oceanobs09.net/.
    • Stramma, L. and Schott, F. 1999. The mean flow field of the tropical Atlantic Ocean. Deep-sea Res. II 46, 279-303.
    • Sweeney, C., Gloor, E., Jacbson, A. R., Key, R. M., McKinley, M. and co-authors. 2007. Constrainning global air-sea gas exchange for CO2 with recent bomb 14C measurements. Global Biogeochim. Cycles 21, 1-10.
    • Takahashi, T., Olafsson, J., Goddard, J. G., Chipman, D. W. and Sutherland, S. C. 1993. Seasonal variation of CO2 and nutrients in the highlatitude surface oceans: a comparative study. Global Biogeochem. Cycles 7, 843-878.
    • Takahashi, T., Sutherland, S. C., Wanninkhof, R., Sweeney, C., Feely, R. A. and co-authors. 2009. Climatological mean and decadal change in surface ocean pCO2, and net sea-air CO2 flux over the global oceans. Deep-Sea Res. Part II 56, 554-577.
    • Ternon, J., Oudot, C., Dessier, A. and Diverres, D. 2000. A seasonal tropical sink for atmospheric CO2 in the Atlantic Ocean: the role of the Amazon River discharge. Mar. Chem. 68, 183- 201.
    • Torrence, C. and Compo, G. P. 1998. A practical guide to wavelet analysis. Bull. Am. Meteorol. Soc. 79, 61-78.
    • Voituriez, B. and Herbland, A. 1979. The use of the salinity maximum of the Equatorial Undercurrent for estimating nutrient enrichment and primary production in the Gulf of Guinea. Deep Sea Res. Part A. Oceanogr. Res. Papers 26, 77-83.
    • Voituriez, B. and Herbland, A. 1982. Primary production in the Tropical Atlantic ocean mapped from oxygen values of equalant 1 and 2 (1963). Bull. Mar. Sci. 31, 853-863.
    • Weiss, R. F. 1974. CO2 in water and seawater: the solubility of a non ideal gas. Mar. Chem. 2, 203-215.
    • Weiss, R. F. and Price, B. A. 1980. Nitrous oxide solubility of a non ideal gas. Mar. Chem. 8, 347-359.
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