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Original Research Papers

Shipboard measurements of atmospheric oxygen using a vacuum-ultraviolet absorption technique

Authors:

Britton B. Stephens ,

National Center for Atmospheric Research, US
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Ralph F. Keeling,

Scripps Institution of Oceanography, University of California, US
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William J. Paplawsky

Scripps Institution of Oceanography, University of California, US
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Abstract

We have developed an instrument for making continuous, field-based, part-per-million (ppm) level measurements of atmospheric oxygen concentration, and have implemented it on research cruises in the equatorial Pacific and Southern Oceans. The instrument detects changes in oxygen by the absorption of vacuum ultraviolet (VUV) radiation as it passes through a flowing gas stream, and has a precision comparable to existing laboratory techniques. Here we describe the VUV instrument and present atmospheric O2 and CO2data collected from the NOAA ship Ka’imimoana in the equatorial Pacific during April and May of 1998, and from the NSF ship Lawrence M. Gould in the Southern Ocean during October 1998. These data represent the first field-based measurements of atmospheric O2, and significant additions to the O2 datasets in these regions. Our boreal-springtime equatorial measurements reveal significant short-term variations in atmospheric O2, resulting from variations in atmospheric mixing relative to the strong interhemispheric gradient. Our austral-springtime Southern Ocean observations confirm the low O2 concentrations seen in flask samples from this region, allow the separate identification of oceanic and industrial influences on CO2, and provide evidence of a Southern Ocean source for CO2 at this time of year. These shipboard VUV observations do not provide any evidence to support coupled ocean—atmosphere model predictions of a large decreasing atmospheric O2 gradient between equatorial and high-southern latitudes.

How to Cite: Stephens, B.B., Keeling, R.F. and Paplawsky, W.J., 2003. Shipboard measurements of atmospheric oxygen using a vacuum-ultraviolet absorption technique. Tellus B: Chemical and Physical Meteorology, 55(4), pp.857–878. DOI: http://doi.org/10.3402/tellusb.v55i4.16386
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  Published on 01 Jan 2003
 Accepted on 12 Mar 2003            Submitted on 15 Aug 2002

References

  1. Aumont , O . 1998 . Etude du cycle naturel du carbone dans un modele 3D de P ocean mondial , Ph.D. Thesis , Univ. Pierre et Marie Curie , Paris .  

  2. Battle , M. , Bender , M. L. , Tans , P. P. , White , J. W. C. , Ellis , J. T. , Conway , T. and Francey , R. J . 2000 . Global carbon sinks and their variability inferred from atmospheric 02 and 13C . Science 287 , 2467 – 2470 .  

  3. Bender , M. L. , Tans , P. P. , Ellis , J. T. , Orchardo , J. and Habfast , K . 1994 . A high precision ratio mass spectrome-try method for measuring the 02/N2 ratio of air , Geochim. Cosmochim. Acta 58 , 4751 – 4758 .  

  4. Bender , M. L. , Ellis , J. T. , Tans , P. P. , Francey , R. and Lowe , D . 1996 . Variability in the 02/N2 ratio of Southern Hemi-sphere air, 1991-1994: Implications for the carbon cycle . Global Biogeochem. Cycles 10 , 9 – 21 .  

  5. Broecker , W. S. , Sutherland , S. , and Peng , T.-H . 1999 . A possible 20th-century slowdown of Southern Ocean deep water formation . Science 286 , 1132 – 1135 .  

  6. Denning , A. S. , Fung , I. Y. and Randall , D. A . 1995 . Latitudi-nal gradient of atmospheric CO2 due to seasonal exchange with land biota . Nature 376 , 240 – 243 .  

  7. Draxler , R. R. and Hess , G. D . 1998 . An overview of the HYSPLIT_4 modelling system for trajectories, dis-persion, and deposition . AusL Meteorol. Mag . 47 , 295 – 308 .  

  8. Gruber , N. , Gloor , M. , Fan , S.-M. and Sarmiento , J. L . 2001 . Air-sea flux of oxygen estimated from bulk data: Impli-cations for the marine and atmospheric oxygen cycles . Global Biogeochem Cycles 15 , 783 – 804 .  

  9. Heimann , M . 1995. The global atmospheric tracer model TM2. Tech. Rep. 10, Deutsch. Klimarechenzentrum, Hamburg, Germany, 53 pp.  

  10. Hogan , A. , Barnard , S. , Samson , J. and Winters , W . 1982 . The transport of heat, water vapor and particulate material to the South Polar Plateau. J. Geophys. Res . 87 , 4287 – 4292. Hogan, A. W., Egan, W. G., Sampson, J. A., Barnard, S. C., Riley, D. M. and Murphey, B. B. 1990. Seasonal variation of some constituents of Antarctic tropospheric air . Geo-phys. Res. Lett . 17 , 2365 – 2368 .  

  11. Inn , E. C. Y. , Watanabe , K. and Zelilcoff , M . 1953 . Absorption coefficients of gases in the vacuum ultraviolet. Part Bl. CO2, J . Chem. Phys. 21 , 1648 – 1650 .  

  12. IPCC 2001 . Climate Change 2001: The Scientific Basis . Contribution of Working Group I to the Third Assess-ment Report of the Intergovernmental Panel on Climate Change (eds. J. T. Houghton et al). Cambridge Univ. Press , New York .  

  13. Kaplan , A. , Jurgens , C. and Yu , K . 1971. Ultraviolet oxygen sensor, Instrument and Control Systems, February, 113 – 114  

  14. Keeling , R. F . 1988. Development of an interferometric oxy-gen analyzer for precise measurement of the atmospheric 02 mole fraction, Ph.D. Thesis, Harvard Univ., Cambridge, Mass, 178 pp.  

  15. Keeling , R. F. and Shertz , S. R . 1992 . Seasonal and inter-annual variations in atmospheric oxygen and implications for the global carbon cycle . Nature 358 , 723 – 727 .  

  16. Keeling , R. F. , Najjar , R. G. , Bender , M. L. and Tans , P. P . 1993 . What atmospheric oxygen measurements can tell us about the global carbon cycle . Global Biogeochem. Cycles 7 , 37 – 67 .  

  17. Keeling , R. F. , Piper , S. C. and Heimann , M . 1996 . Global and hemispheric CO2 sinks deduced from changes in at-mospheric 02 concentration . Nature 381 , 218 – 221 .  

  18. Keeling , R. F. , Manning , A. C. , McEvoy , E. M. and Shertz , S. R . 1998a . Methods for measuring changes in atmospheric 02 concentration and their application in southern hemi-sphere air . J. Geophys. Res . 103 , 3381 – 3397 .  

  19. Keeling , R. E , Stephens , B. B. , Najjar , R. G. , Doney , S. C. , Archer , D. and Heimann , M . 1998b . Seasonal variations in the atmospheric 02/N2 ratio in relation to the kinetics of air-sea gas exchange . Global Biogeochem. Cycles 12 , 141 – 163 .  

  20. Kronick , M. N. , Bryson , C. E. , Bridgham , J. A. and Eletr , S. H . 1980 . Measurement of oxygen by differential absorption of UV radiation . U.S. Patent No . 4192996 .  

  21. Le Quere , C. , On , J. C. , Monfray , P. , Aumont, 0. and Madec, G. 2000. Interannual variability of the oceanic sink of CO2 from 1979 to 1997. Global Biogeochem. Cycles 14, 1247 – 1265.  

  22. 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, Ph.D. thesis, University of California, San Diego, CA, 202 pp.  

  23. Manning , A. C. and Keeling , R. E 1994. Correlations in short-term variations in atmospheric oxygen and carbon diox-ide at Mauna Loa Observatory., In Climate Monitoring and Diagnostics Laboratory No. 22 Summary Report (ed. J. T. Peterson ). NOAA ERL, Boulder, CO, 121 – 123  

  24. Manning , A. C. , Keeling , R. E and Severinghaus , J. P . 1999 . Precise atmospheric oxygen measurements with a param-agnetic oxygen analyzer . Global Biogeochem. Cycles 13 , 1107 – 1115 .  

  25. McGillis , W. R. , Edson , J. B. , Hare , J. E. and Fairall , C. W . 2001. Direct covariance air-sea CO2 fluxes. J. Geophys. Res . 106 , 16,729 – 16,746.  

  26. McPhaden , M. J . 1999 . Genesis and evolution of the 1997-1998 El Nino . Science 283 , 950 – 954 .  

  27. Najjar , R. G. and Keeling , R. F . 1997 . Analysis of the mean annual cycle of the dissolved oxygen anomaly in the World Ocean . J. Marine Res . 55 , 117 – 151 .  

  28. Najjar , R. G. and Keeling , R. F . 2000 . Mean annual cycle of the air-sea oxygen flux; a global view . Global Biogeochem. Cycles 14 , 573 – 584 .  

  29. On , J. C. , Maier-Reimer , E. , Milcolajewicz , U. , Monfray , P. , Sarmiento , J. L. and coauthors, 2001. Estimates of anthro-pogenic carbon uptake from four three-dimensional ocean models. Global Biogeochem. Cycles 15, 43 – 60.  

  30. Parish , T. R . 1988 . Surface winds over the Antarctic conti-nent: A review . Rev. Geophys . 26 , 169 – 180 .  

  31. Rasch , P. J. , Feichter , J. , Law , K. , Mahowald , N. , Penner , J. and coauthors. 2000 . A comparison of scavenging and deposition processes in global models: results from the WCRP Cambridge Workshop of 1995 . Tellus 52B , 1025 – 1056 .  

  32. Samson , J. A. R . 1967 . Techniques of vacuum ultraviolet spectroscopy , Wiley , New York , 348 pp .  

  33. Samson , J. A. , Barnard , S. C. , Obremski , J. S. , Riley , D. C. , Black , J. J. and Hogan , A. W . 1990 . On the systematic variation in surface aerosol concentration at the South Pole . Atmos. Res . 25 , 385 – 396 .  

  34. Sarmiento , J. L. and Le Quere , C . 1996 . Oceanic carbon diox-ide uptake in a model of century-scale global warming , Science 274 , 1346 – 1350 .  

  35. Severinghaus , J. P . 1995. Studies of the terrestrial 02 and carbon cycles in sand dune gases and in Biosphere 2. Ph.D. Thesis, Columbia Univ., New York, 148 pp.  

  36. Six , K. and Maier-Reimer , E . 1996 . Effects of plankton dy-namics on carbon fluxes in an ocean general circulation model . Global Biogeochem. Cycles 10 , 559 – 583 .  

  37. Stephens , B. B . 1999. Field-based atmospheric oxygen mea-surements and the ocean carbon cycle. Ph.D. Thesis, Uni-versity of California, San Diego, 221 pp.  

  38. Stephens , B. B. , Keeling , R. F. , Heimann , M. , Six , K. D. , Murnane , R. and Caldeira , K. 1998. Testing global ocean carbon cycle models using measurements of atmospheric 02 and CO2 concentration. Global Biogeochem. Cycles 12, 213 – 230.  

  39. Stephens , B. B. , Wofsy , S. C. , Keeling , R. F. , Tans , P. P. and Potosnak , M. J. 2000. The CO2 Budget and Rectification Airborne Study: Strategies for measuring rectifiers and re-gional fluxes. Inverse Methods in Global Biogeochemical Cycles, Geophysical Monograph 114, AGU.  

  40. Stephens , B. , Balcwin , P. , Tans , P. and Teclaw , R. 2001, Mea-surements of atmospheric 02 variations at the WLEF tall-tower site, Sixth International Carbon Dioxide Conference, Extended Abstracts, Vol. I, [Nakazawa, TI, Tohoku Univ., Sendai, 78 – 80  

  41. Takahashi , T. , Wanninlchof , R. H. , Feely , R. A. , Weiss , R. F. , Chipman , D. W. , Bates , N. , Olafsson , J. , Sabine , C. and Sutherland , S. C. 1999. Net sea-air CO2 flux over the global oceans; An improved estimate based on the sea-air pCO2 difference. In Proceedings of the 2nd International Symposium CO2 in the Oceans (ed. Y. Nojiri ). Center for Global Environmental Research, Japan, 9 – 15  

  42. TAO 2002 . The Tropical Atmosphere Ocean Array . http:// www.pmel.noaa.gov/tao, NOAA Pacific Marine Environ-mental Laboratory , Seattle .  

  43. Tohjima , Y . 2000. Method for measuring changes in the at-mospheric 02/1\12 ratio by a gas chromatograph equipped with a thermal conductivity detector. J. Geophys. Res . 105 , 14,575 – 14,584.  

  44. Tomczak , M. and Godfrey , J. S . 1994 . Regional oceanogra-phy: an iIntroduction . Pergamon , Oxford , 67 – 87 .  

  45. Wanninlchof , R. , Feely , R. A. , Atwood , D. K. , Berberian , G. , Wilson , D. , Murphy , P. P and Lamb, M. F. 1995. Seasonal and lateral variations in carbon chemistry of surface water in the eastern equatorial Pacific during 1992. Deep-Sea Res. 11 42, 387 – 409.  

  46. Watanabe , K. , Inn , E. C. Y. and Zelikoff , M . 1953 . Absorption coefficients of oxygen in the vacuum ultraviolet . J. Chem. Phys . 21 , 1026 – 30 .  

  47. Wong , J. Y . 1978 . Measuring gaseous oxygen with U . V. ab-sorption. U.S. Patent 4096388 .  

  48. Wong , J. Y . 1986 . Oxygen analysis employing absorption spectroscopy . U.S. Patent 4591721 .  

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