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Boutin, J.; Etcheto, J.; Dandonneau, Y.; Bakker, D. C. E.; Feely, R. A.; Inoue, H. Y.; Ishii, M.; Ling, R. D.; Nightingale, P. D.; Metzl, N.; Wanninkhof, R. (2011)
Publisher: Tellus B
Journal: Tellus B
Languages: English
Types: Article
In order to determine the seasonal and interannual variability of the CO2 released to the atmosphere from the equatorial Pacific, we have developed pCO2-temperature relationships based upon shipboard oceanic CO2 partial pressure measurements, pCO2, and satellite sea surface temperature, SST, measurements. We interpret the spatial variability in pCO2 with the help of the SST imagery. In the eastern equatorial Pacific, at 5°S, pCO2 variations of up to 100 μatm are caused by undulations in the southern boundary of the equatorial upwelled waters. These undulations appear to be periodic with a phase and a wavelength comparable to tropical instability waves, TIW, observed at the northern boundary of the equatorial upwelling. Once the pCO2 signature of the TIW is removed from the Alize II cruise measurements in January 1991, the equatorial pCO2 data exhibit a diel cycle of about 10 matm with maximum values occurring at night. In the western equatorial Pacific, the variability in pCO2 is primarily governed by the displacement of the boundary between warm pool waters, where air–sea CO2 fluxes are weak, and equatorial upwelled waters which release high CO2 fluxes to the atmosphere. We detect this boundary using satellite SST maps. East of the warm pool, ΔP is related to SST and SST anomalies. The 1985–97 CO2 flux is computed in a 5° wide latitudinal band as a combination of ΔP and CO2 exchange coefficient, K, deduced from satellite wind speeds, U. It exhibits up to a factor 2 seasonal variation caused by K-seasonal variation and a large interannual variability, a factor 5 variation between 1987 and 1988. The interannual variability is primarily driven by displacements of the warm pool that makes the surface area of the outgassing region variable. The contribution of ΔP to the flux variability is about half the contribution of K. The mean CO2 flux computed using either the Liss and Merlivat (1986) or the Wanninkhof (1992) K–U parametrization amounts to 0.11 GtC yr−1 or to 0.18 GtC yr−1, respectively. The error in the integrated flux, without taking into account the uncertainty on the K–U parametrization, is less than 31%.DOI: 10.1034/j.1600-0889.1999.00025.x
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    • Ando, K. and McPhaden, M. J. 1997. Variability of surface layer hydrography in the tropical Pacific Ocean. J. Geophys. Res. 102, 23,063-23,078.
    • Boutin, J. and Etcheto, J. 1995. Estimating the chemical enhancement eVect on the air-sea CO2 exchange using the ERS1 scatterometer wind speeds. In: Air-water gas transfer (eds. Ja¨hne, B. and Monahan, E. C.). AEON Verlag & Studio, Hanau, Germany, 827-841.
    • Boutin, J. and Etcheto, J. 1996. Consistency of Geosat, SSM/I and ERS1 global surface wind speeds; comparison with in-situ data. J. Atmos. Oceanic T echnol. 13, 183-197.
    • Boutin, J. and Etcheto, J. 1997. Long-term variability of the air-sea CO2 exchange coeYcient: Consequences for the CO2 fluxes in the equatorial Pacific Ocean. Global Biogeochem. Cycles 11, 453-470.
    • Boutin, J., Siefridt, L., Etcheto, J. and Barnier, B. 1996. Comparison of ECMWF and satellite wind speed from 1985 to 1992. Int. J. Remote Sens. 17, 2897-2913.
    • Bryden, H. L. and Brady, E. C. 1985. Diagnostic model of the three-dimensional circulation in the upper equatorial Pacific Ocean. J. Phys. Oceanogr. 15, 1255-1273.
    • Bucher, J. M. 1997. Interpolation optimale du coeYcient d'echange air-mer du CO2 obtenu par teledetection satellitaire. Stage Report LODYC, Paris, France.
    • Cooper, D. J., Watson, A. J. and Nightingale, P. D. 1996. Large decrease in ocean-surface CO2 fugacity in response to in situ iron fertilization. Nature 383, 511-513.
    • Copin-Montegut, C. 1988. A new formula for the eVect of temperature on the partial pressure of CO2 in seawater. Mar. Chem. 25, 29-37.
    • Copin-Monte´gut, C. 1989. Corrigendum. A new formula for the eVect of temperature on the partial pressure of CO2 in sea water. Mar. Chem. 27, 143-144.
    • Dandonneau, Y. 1995. Sea-surface partial pressure of carbon dioxide in the eastern equatorial Pacific (August 1991 to October 1992): A multivariate analysis of physical and biological factors. Deep-Sea Res. 42, 349-364.
    • Dandonneau, Y. and Edlin, G. 1987. Southwestward extent of chlorophyll-enriched waters from the Peruvian and equatorial upwellings between Tahiti and Panama. Mar. Ecol. Prog. Ser. 38, 283-294.
    • Edlin, G., Rodier, M. and Radenac, M. H. 1997. Physical and nutrient variability in the upper equatorial Pacific associated with westerly wind forcing and wave activity in October 1994. Deep-Sea Res. 44, 1783-1800.
    • Etcheto, J., Boutin, J., Dandonneau, Y., Bakker, D. C. E., Nightingale, P. D., Ling, R. D., Feely, R. A. and Wanninkhof, R. 1999. Air-sea CO2 flux in the equatorial Pacific Ocean east of 110°W. T ellus 51B, in press.
    • Feely, R. A., Wanninkhof, R., Cosca, C. E., McPhaden, M. J., Byrne, R. H., Millero, F. J., Chavez, F. P., Clayton, T., Campbell, D. M. and Murphy, P. P. 1994. The eVect of tropical instability waves on CO2 species distributions along the equator in the eastern equatorial Pacific during the 1992 ENSO event. Geophys. Res. L ett. 21, 277-280.
    • Feely, R. A., Wanninkhof, R., Costa, C. E., Murphy, P. P., Lamb, M. F. and Steckley, M. D. 1995. CO2 distributions in the equatorial Pacific during the 1991-1992 ENSO event. Deep-Sea Res. II 42, 365-386.
    • Flament, P. J., Kennan, S. C., Knox, R. A., Niiler, P. P. and Bernstein, R. L. 1996. The three-dimensional structure of an upper ocean vortex in the tropical Pacific ocean. Science 383, 610-613.
    • Goyet, C. and Peltzer, E. T. 1997. Variation of CO2 partial pressure in surface seawater in the equatorial Pacific Ocean. Deep-Sea Res. 44, 1611-1626.
    • Hayes, S. P., Mangum, L.J., Picaut, J., Sumi, A. and Takeuchi, K. 1991. TOGA-TAO: a moored array for real time measurements in the tropical Pacific Ocean. Bull. Am. Meteorol. Soc. 72, 339-347.
    • Ho, D. T., Wanninkhof, R., Masters, J., Feely, R. A. and Cosca, C. E. 1997. Measurements of underway f CO2 in the eastern equatorial Pacific on NOAA ships Malcom Baldrige and Discoverer f rom February to September, 1994. NOAA Data Report AOML-30, AOML, Miami, Florida, April 1997.
    • Inoue, H. Y., Ishii, M., Matsueda, H. and Ahoyama, M. 1996. Changes in longitudinal distribution of the partial pressure of CO2 (pCO2) in the central and western equatorial Pacific, west of 160°W. Geophys. Res. L ett. 23, 1781-1784.
    • Inoue, H. Y. and Sugimura, Y. 1992. Variations and distributions of CO2 in and over the equatorial Pacific during the period from the 1986/88 El Nin˜ o event to the 1988/89 La Nin˜ a event. T ellus 44, 1-22.
    • Kennish, M. J. 1989. Practical handbook of marine science. 710 pp., CRC press, Boca Raton, Florida.
    • LeBorgne, R., Brunet, C., Edlin, G., Radenac, M. H. and Rodier, M. 1995. Campagne oceanographique FLUPAC. Recueil de donnees. Tome 1. 337 pp.
    • Lee, K., Millero, F. and Wanninkhof, R. 1997. The carbon dioxide in the Atlantic Ocean. J. Geophys. Res. 102, 15693-15707.
    • Lefevre, N., Andrie, C., Dandonneau, Y., Reverdin, G. and Rodier, M. 1994. PCO2, chemical properties, and estimated new production in the equatorial Pacific in January-March 1991. J. Geophys. Res. 99, 12639-12654.
    • Lefe`vre, N. and Dandonneau, Y. 1992. Air-sea CO2 fluxes in the equatorial Pacific Ocean in JanuaryMarch 1991. Geophys. Res. L ett. 19, 2223-2226.
    • Legeckis, R. 1977. Long waves in the eastern equatorial Pacific Ocean: A view from a geostationary satellite. Science 197, 1179-1181.
    • Liss, P. S. and Merlivat, L. 1986. Air-sea gas exchange rates: Introduction and synthesis. In: T he roˆle of air-sea exchange in geochemical cycling (ed. BuatMe´nart, P.). D. Reidel, Norwell, Mass., 113-127.
    • Masters, J., Wanninkhof, R., Ho, D. T., Steckley, M., Feely, R. and Cosca, C. 1997. Continuous air and surface seawater measurements of f CO2 on board the NOAA ship Malcom Baldrige around-the-world-cruise during 1995. NOAA Data Report ERL AOML-31, AOML, Miami, Florida, October 1997.
    • McNeil, C. L. and Merlivat, L. 1996. The warm oceanic surface layer: Implications for CO2 fluxes and surface gas measurements. Geophys. Res. L ett. 23, 3575-3578.
    • McPhaden, M. J. 1993. TOGA-TAO and the 1991-93 El Nin˜ o-Southern Oscillation event. Oceanography 6, 36-44.
    • Metzl, N. and Bres, B. 1996. Mesure en continu de CO2 dans les eaux de surface. In: Campagne oceanographique OL IPAC. Recueil de donnees (eds. Moulin, T. and Coste, B.), pp. 217-219.
    • Murphy, P. P., Kelly, K. C., Feely, R. A. and Gammon, R. H. 1994. Carbon dioxide concentrations in surface water and the atmosphere: PMEL cruises 1986-1989. Report 1504, Pac. Mar. Environ. Lab., NOAA, Seattle, Wash., February 1994.
    • NASA_Scatterometer_Report 1997. Science data product user's manual; overview and geophysical data product. Report D-12985, Jet Propulsion Laboratory, California Institute of Technology, Callifornia, April 1997.
    • Picaut, J., Ioualalen, M., Menkes, C., Delcroix, T. and McPhaden, M. J. 1996. Mechanism of the zonal displacement of the Pacific Warm Pool: Implications for ENSO. Science 274, 1486-1489.
    • Qiao, L. and Weisberg, R. H. 1995. Tropical instability wave kinematics: Observations from the Tropical Instability Wave Experiment. J. Geophys. Res. 100, 8677-8693.
    • Quilfen, Y. and Bentamy, A. 1994. Calibration/validation of ERS-1 scatterometer precision products. Igarss Proceedings, 945-947, Pasadena.
    • Ralph, E. A., Bi, K., Niiler, P. P. and DuPenhoat, Y. 1997. A lagrangian description of the western Equatorial Pacific response to the wind burst of December 1992: heat advection in the warm pool. J. Clim. 10, 1706-1721.
    • Reynolds, R.W., and Smith, T. M. 1994. Improved global sea surface temperature analyses using optimum interpolation. J. Clim. 7, 929-948.
    • Robertson, J. E., Watson, A. J., Langdon, C., Ling, R. D. and Wood, J. 1993. Diurnal variations in surface pCO2 and oxygen at 60N, 20W in the N.E. Atlantic. DeepSea Res. II 40, 409-422.
    • Takahashi, T., Olafsson, J., Goddard, J., Chipman, D. W. and Sutherland, S. C. 1993. Seasonal variations of CO2 and nutrients in the high-latitude surface oceans: a comparative study. Global Biogeochem. Cycles 7, 843-878.
    • Taylor, A. H., and Stephens, J. A. 1993. Diurnal variations of convective mixing and the spring bloom of phytoplankton. Deep-Sea Res. II 40, 389-408.
    • Thoning, K., Tans, P. and Komhyr, W. 1989. Atmospheric carbon dioxide at Mauna Loa Observatory 2. Analysis of the NOAA GMCC data 1974-1985. J. Geophys. Res. 94, 8549-8565.
    • Vialard, J. and Delecluse, P. 1997. An OGCM study for the TOGA decade. Part II: Barrier layer formation and variability. J. Phys. Oceanogr., in press.
    • Wanninkhof, R., Feely, R. A., Chen, H., Cosca, C. and Murphy, P. P. 1996. Surface water f CO2 in the eastern equatorial Pacific during the 1992-1993 El Ni n˜o. J. Geophys. Res. 101, 16333-16343.
    • Wentz, F. J. 1992. Measurement of oceanic wind vector using satellite microwave radiometers. IEEE T rans. Geosci. Remote Sens. 30, 960-972.
    • Witter, D. L. and Chelton, D. B. 1991. A Geosat altimeter wind speed algorithm and a method for altimeter wind speed algorithm development. J. Geophys. Res. 96, 8853-8860.
    • Wong, C. S., Chang, Y. H., Page, J. S., Smith, G. E. and Bellegay, R. D. 1993. Changes in equatorial CO2 fluxes and new production estimated from CO2 and nutrient levels in Pacific surface waters during the 1986/87 El Nin˜ o. T ellus B45, 64-79.
    • Yoder, J. A., Ackleson, S. G., Barber, R. T., Flament, P. and Balch, W. M. 1994. A line in the sea. Nature 371, 689-692.
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