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Keeling, Ralph F.; Blaine, Tegan; Paplawsky, Bill; Katz, Laura; Atwood, Chris; Brockwell, Tim (2011)
Publisher: Tellus B
Journal: Tellus B
Languages: English
Types: Article
Subjects:
The atmospheric Ar/N2 ratio is expected to undergo very slight variations due to exchanges of Ar and N2 across the air–sea interface, driven by ocean solubility changes. Observations of these variations may provide useful constraints on large-scale fluxes of heat across the air–sea interface. A mass spectrometer system is described that incorporates a magnet with a wide exit face, allowing a large mass spread, and incorporates an inlet with rapid (5 s) switching of sources gases through a single capillary, thus achieving high precision in the comparison of sample and reference gases. The system allows simultaneous measurement of Ar/N2, O2/N2 and CO2/N2 ratios. The system achieves a short-term precision in Ar/N2 of 10 per meg for a 10 s integration, which can be averaged to achieve an internal precision of a few per meg in the comparison of reference gases. Results for Ar/N2 are reported from flasks samples collected from nine stations in a north-to-south global network over about a 1 yr period. The imprecision on an individual flask, as estimated from replicate agreement, is ±11 per meg. This imprecision is dominated by real variability between samples at the time of analysis. Seasonal cycles are marginally resolved at the extra-tropical stations with amplitudes of 5 to 15 per meg. Annual-mean values are constant between stations to within ±5 per meg. The results are compared with a numerical simulation of the cycles and gradients in Ar/N2 based on the TM2 tracer transport model in combination with air–sea Ar and N2 fluxes derived from climatological air–sea heat fluxes. The possibility is suggested that Ar/N2 ratios may be detectably enriched near the ground by gravimetric or thermal fractionation under conditions of strong surface inversions.DOI: 10.1111/j.1600-0889.2004.00117.x
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    • Baggeroer, A. B., Birdsall, T. G., Clark, C., Colosi, J. A., Cornuelle, B. D. et al. 1998. Ocean climate change: comparison of acoustic tomography, satellite altimetry, and modeling. Science 281(5381), 1327-1332.
    • Battle, M., Bender, M., Hendricks, M. B., Ho, D. T., Mika, R. et al. 2003. Measurements and models of the atmospheric Ar/N2 ratio. Geophys. Res. Lett. 30(15), 1786, doi:10.1029/2003GL017411.
    • Bender, M. L., Tans, P. P., Ellis, J. T., Orchardo, J. and Habfast, K. 1994. A high-precision isotope ratio mass-spectrometry method for measuring the O2/N2 ratio of air. Geochim. Cosmochim. Acta 58(21), 4751-4758.
    • Cabanes, C., Cazenave, A. and Le Provost, C. 2001. Sea level rise during past 40 years determined from satellite and in situ observations. Science 294(5543), 840-842.
    • Craig, H., Weiss, R. F. and Clarke, W. B. 1967. Dissolved gases in the Equatorial and South Pacific Ocean. J. Geophys. Res. 72, 6165-6181.
    • Craig, H. and Wiens, R. C. 1996. Gravitational enrichment of Kr-84/Ar36 ratios in polar ice caps: a measure of firn thickness and accumulation temperature. Science 271(5256), 1708-1710.
    • da Silva, A. M., Young, C. and Levitus, S. 1994. Atlas of Surface Marine Data 1994 Volume 1: Algorithms and Procedures, NOAA Atlas NESDIS 6. US Government Printing Office, Washington, DC.
    • Garcia, H. E. and Keeling, R. F. 2001. On the global oxygen anomaly and air-sea flux. J. Geophys. Res. Oceans 106(NC12), 31 155-31 166.
    • Gibson, J. K., Ka˚llberg, P., Uppala, S., Hernandez, A., Nomura, A. et al. 1997. ERA Description. European Centre for Medium-Range Weather Forecasts, Reading.
    • Gille, S. T. 2002. Warming of the Southern Ocean since the 1950s. Science 295(5558), 1275-1277.
    • Glueckauf, E. 1951. The composition of atmospheric air. In: Compendium of Meteorology (ed. T. Malone). American Meteorological Society, Boston, MA, pp. 3-10.
    • Grew, K. E. and Ibbs, T. L. 1952. Thermal Diffusion in Gases. Cambridge University Press, Cambridge.
    • Hamme, R. C. and Emerson, S. R. 2002. Mechanisms controlling the global oceanic distribution of the inert gases argon, nitrogen and neon. Geophys. Res. Lett. 29(23), 2120, doi:10.1029/2002GL015273.
    • Heimann, M. 1995. The Global Atmospheric Tracer Model TM2. Deutsches Klimarechenzentrum, Hamburg.
    • Kahl, J. D., Serreze, M. C. and Schnell, R. C. 1992. Tropospheric lowlevel temperature inversions in the Canadian Arctic. Atmos. Ocean 30(4), 511-529.
    • Keeling, R. F., Manning, A. C., McEvoy, E. M. and Shertz, S. R. 1998. Methods for measuring changes in atmospheric O2 concentration and their application in southern hemisphere air. J. Geophys. Res. Atmos. 103(D3), 3381-3397.
    • Keeling, R. F., Najjar, R. P., Bender, M. L. and Tans, P. P. 1993. What atmospheric oxygen measurements can tell us about the global carbon cycle. Global Biogeochem. 7(1), 37-67.
    • Leuenberger, M., Nyfeler, P., Moret, H. P., Sturm, P. and Huber, C. 2000. A new gas inlet system for an isotope ratio mass spectrometer improves reproducibility. Rapid Commun. Mass Spectrom. 14(16), 1543-1551.
    • Levitus, S., Antonov, J. I., Boyer, T. P. and Stephens, C. 2000. Warming of the world ocean. Science 287(5461), 2225-2229.
    • Levitus, S., Antonov, J. I., Wang, J. L., Delworth, T. L., Dixon, K. W. et al. 2001. Anthropogenic warming of Earth's climate system. Science 292(5515), 267-270.
    • Manning, A. C. 2001. Temporal variability of atmospheric oxygen from both continuous measurements and a flask sampling network: tools for studying the global carbon cycle. PhD Thesis, University of California, San Diego.
    • Munk, W. and Wunsch, C. 1979. Ocean acoustic tomography-scheme for large-scale monitoring. Deep-Sea Res. A-Oceanogr. Res. Papers 26(2), 123-161.
    • Neff, W. D. 1999. Decadal time scale trends and variability in the tropospheric circulation over the South Pole. J. Geophys. Res. Atmos. 104(D22), 27 217-27 251.
    • Ozima, M. and Podosek, F. A. 1983. Noble Gas Geochemistry. Cambridge University Press, Cambridge.
    • Peixoto, J. P. and Oort, A. H. 1992. Physics of Climate. American Institute of Physics, New York.
    • Reid, R. C., Prausnitz, J. M. and Poling, B. E. 1987. The Properties of Gases and Liquids, 4th Edition. McGraw-Hill, New York.
    • Samuels, B. L. and Cox, M. 1987. Date set atlas for oceanographic modeling. Ocean Modeling 75, 1-3.
    • Schudlich, R. and Emerson, S. 1996. Gas supersaturation in the surface ocean: the roles of heat flux, gas exchange, and bubbles. Deep-Sea Res. II-Topical Stud. Oceanogr. 43(2-3), 569-589.
    • Severinghaus, J. P., Grachev, A. and Battle, M. 2001. Thermal fractionation of air in polar firn by seasonal temperature gradients. Geochem. Geophys. Geosyst. 2, paper no 2000GC000146.
    • Shea, D. J., Trenberth, K. E. and Reynolds, R. W. 1992. A global monthly sea surface temperature climatology. J. Climate 5, 987-1001.
    • Spitzer, W. S. and Jenkins, W. J. 1989. Rates of vertical mixing, gas exchange, and new production: estimates from seasonal gas cycles in the upper ocean near Bermuda. J. Marine Res. 47, 169-196.
    • Stephens, B. B., Keeling, R. F., Heimann, M., Six, K. D., Murnane, R. et al. 1998. Testing global ocean carbon cycle models using measurements of atmospheric O2 and CO2 concentration. Global Biogeochem. Cycles 12(2), 213-230.
    • Stute, M., Forster, M., Frischkorn, H., Serejo, A., Clark, J. F. et al. 1995. Cooling of tropical Brazil (5 degrees C) during the last glacial maximum. Science 269(5222), 379-383.
    • Tans, P. P., Conway, T. J. and Nakazawa, T. 1989. Latitudinal distribution of the source and sinks of atmospheric carbon dioxide derived from surface observations and an atmospheric transport model. J. Geophys. Res. 94, 5151-5173.
    • Trenberth, K. E. 1981. Seasonal variations in global sea level pressure and the total mass of the atmosphere. J. Geophys. Res. 86(C6), 5238- 5246.
    • Trengove, R. D. and Dunlop, P. J. 1982. Diffusion coefficients and thermal diffusion factors for five binary systems of nitrogen and a noble gas. Physica 115A, 339-352.
    • Weiss, R. F. 1970. Solubility of nitrogen, oxygen, and argon in water and seawater. Deep-Sea Res. 17, 721-735.
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