Abstract
It has been suggested that iodine oxides, IOx, could play a significant role in the ozone destruction in the lower stratosphere. To investigate this suggestion, spectra from nine SAOZ uv-visible spectrometer balloon flights were examined for the IO absorption signature between 405 and 450 nm. IO was not detected, either at mid- or high latitude, in the morning or the evening, in summer or winter. An upper limit of 0.2 parts per trillion by volume (pptv) at 20 km and 0.1 pptv at 15 km at the 95% confidence level (2σ), was derived from the best measurements at 90° SZA at sunset and sunrise. Since a photochemical model shows that 70% of inorganic iodine should be in the form IO at that time, it is concluded that unless iodine chemistry is different from that assumed at the moment, the role of iodine in stratospheric ozone depletion is small.
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Atkinson, R., Baulch, D.L., Cox, R.A., Hampson, R.F., Kerr, J.A., and Troe, J., 1992, Evaluated kinetic and photochemical data for atmospheric chemistry: supplement IV, J. Phys. Chem.Ref.Data 21, 1125–1568.
Barnes, I., Bonsang, B., Brauers, T., Carlier, P., Cox, R.A., Dorn, H.P., Jenkin, M.E., Lc Bras, G., and Platt, U., 1991, Laboratory and field studies of oxidation processes occurring in the atmospheric marine boundary layer, in: G. LeBras (ed.), Air Pollution Research Report No. 35, Commission of the European Communities, Brussels.
Berg, W.W., Crutzen, P.J., Grahck, F.E., Gitlin, S.N., and Sedlacck, W.A., 1980, First measurements of total chlorine and bromine in the lower stratosphere, Geophys. Res. Lett. 7, 937–940.
Brauers T., Dorn, H.-P., and Platt, U., 1990, Spectroscopic measurements of NO2, O3, SO2, IO and NO3 in maritime air, in G. Restelli and G. Angeletti (eds), Physico-Chemical behaviour of Atmospheric pollutants, Proc. of the 5. Europ. Symp., 237–242, Kluwer Academic Publishers, Doordrecht.
Burkholder, J.B., Ravishankara, A.R., and Solomon, S., 1995, UV/visible and IR absorption cross sections of BrONO2, J. Geophys. Res. 100, 16793–16800.
Chameides, W.L., and Davis, D.D., 1980. Iodine: Its possible role in tropospheric photochemistry, J. Geophys. Res. 85, 7383–7398.
Coquart, B., Jenouvrier, A., and Mérienne, M.F., 1995, The NO2 absorption spectrum. II. Absorption cross-sections at low temperatures in the 400–500 nm region., J. Atmos. Chem. 21, 251–261.
DeMore, W.B., Sander, S.P., Howard, C.J., Ravishankara, A.R., Golden, D.M., Kolb, C.E., Hampson, R.F., Kurylo, M.J., and Molina, M.J., 1994, Chemical kinetics and photochemical data for use in stratospheric modeling, Evaluation Number 11, JPL Report 94-26.
Greenblatt, G.D., Orlando, J.J., Burkholder, J.B., and Ravishankara, A.R., 1990, Absorption measurements of oxygen between 330 and 1140 nm, J. Geophys. Res. 95, 18577–18582.
Harwood, M.H., Burkholder, J.B., Hunter, M., Fox, R., and Ravishankara, A.R., 1996, Absorption cross-sections and self-reaction kinetics of the IO radical, submitted to J. Phys. Chem.
Harwood, M.H. and Jones, R.L., 1994, Temperature dependent ultraviolet — visible absorption cross sections of NO2 and N2O4: Low-temperature measurements of the equilibrium constant for 2NO2‹=›N2O4, J. Geophys. Res. 99, 22955–22964.
Himmelmann, S., Ladstactter, A., Orphal, J., Richter, A., and Burrows, J.P., 1996, Time resolved absorption spectrum of iodine oxide by flash photolysis of a iodine ozone mixture, in: J.A. Pyle, N.R.P. Harris, and G.T. Amanatidis (eds.), Air Pollution Research Report No. 56, Proc. 3rd European Polar Ozone Symp., Commission of the European Communities, Brussels, 684–688.
Jenkin, M.E., Cox, R.A., and Candeland, D.E., 1985, Photochemical aspects of tropospheric iodine behaviour, J. Atmos. Chem. 2, 359–375.
Jenkin, M.E., 1993, A comparative assessment of the role of iodine photochemistry in tropospheric ozone depletion, in H. Niki and K.H. Becker (eds).: The Tropospheric Chemistry of Ozone in the Polar Regions, NATO ASI series 17, Springer-Verlag, New York, 405–414.
Laszlo, B., Kurylo, M.J., and Huie, R.E., 1995, Absorption cross sections, kinetics of formation; and self-reaction of the IO radical produced via the laser photolysis of N2O/I2/N2 mixtures, J.Phys.Chem. 99, 11701–11707.
Lateltin, E., Pommereau, J.P., LeTexier, H., Pine, M., and Ramaroson, R., 1994, Perturbation of stratospheric nitrogen dioxide by volcanic aerosol in the arctic, Geophys. Res. Lett. 13, 1411–1414.
Lateltin, E., 1996, Etude du dioxide d'azote dans la basse stratosphère pendant l'hiver arctique 1991–1992, PhD Thesis, University of Paris VI, France.
Lefevre, F., Brasseur, G.P., Folkins, I., Smith, A.K., and Simon, P., 1995, Chemistry of the 1991–1992 stratospheric winter: three dimensional model simulations, J. Geophys. Res. 99, 8183.
Mérienne, M.F., Jenouvrier, A., and Coquart, B., 1995, The NO2 absorption spectrum. L: Absorption cross-sections at ambient temperature in the 300–500 nm region., J. Atmos. Chem. 20, 281–297.
Parisse-Lecerf, C., 1995, Contribution à l'étude des problèmes atmosphériques: Enrégistrement et analyse des spèctrcs ultraviolet-visible de l'Ozone, PhD-Thesis, University of Reims Champagne Ardenne, France
Pommereau, J.-P. and Piquard, J., Ozone and nitrogen dioxide vertical distributions by UV-visible solar occultation from balloons, Geophys. Res. Lett. 21, 1227–1230.
Pommereau, J.-P. and Piquard, J., 1994, Observations of the vertical distribution of stratospheric OClO, Geophys. Res. Lett. 21, 1231–1234.
Pundt, I., Phillips, C., and Pommereau, J.-P., 1996, Upper limit of the IO concentration at twilight in the arctic and mid-latitude lower stratosphere, in: J.A. Pyle, N.R.P. Harris and G.T. Amanatidis (eds.), Air Pollution Research Report No.56, Proc. 3rd European Polar Ozone Symp., Commission of the European Communities, Brussels, 382–387.
Rasmussen, R.A., Khalil, M.A.K., Gunawardena, R., and Hoyt, S.D., 1982, Atmospheric methyl iodide (CH3I), J. Geophys. Res. 87, 3086–3090.
Solomon, S., Gareia, R.R., and Ravishankara, A.R., 1994, On the role of iodine in ozone depletion, J. Geophys. Res. 99, 20491–20499.
Solomon, S., Schmeltekopf, A.L., and Sanders, R.W., 1987, On the interpretation of zenith sky absorption measurements, J. Geophys. Res. 92, 8311–8319.
Stickel, R.E., Hynes, A.J., Bradshow, J.D., Chameides, W.L., and Davis, D.D., 1988, Absorption cross sections and kinetic considerations of the IO radical as determined by laser flash photolysis laser absorption spectroscopy, J. Phys. Chem. 92, 1862–1864.
Turnipsced, A.A., Gilles, M.K., Burkholder, J.B., and Ravishankara, A.R., 1995a, LIF detection of IO and the rate cocfficients for I + O3 and IO + NO reactions, Chem.Phys.Lett. 242, 427–434.
Turnipseed, A.A., Gilles, M.K., Burkholder, J.B., and Ravishankara, A.R., 1995b, Iodine Chemistry in the stratosphere: kinetics of the IO + ClO and IO + BrO reactions, EOS, Trans.Amer.Geophys.U. 76(45), Supplement, F116.
Wayne, R.P., Poulet, G., Biggs, P., Burrows, J.P., Cox, R.A., Crutzen, P.J., Hayman, G.D., Jenkin, M.E., Le Bras, G., Moortgat, G.K., Platt, U., and Schindler, R.N., 1995, Halogen oxides: Radicals, Sources and Reservoirs in the laboratory and in the atmosphere, Atmospheric Environment, special issue, Vol 29,No. 20, 2675–2884.
Wennberg, P.O., Brault, J.W., Hanisco, T.F., Salawitch, R.J., and Mount, G., 1996, The Atmospheric Column Abundance of IO: Implications for Stratospheric Ozone, Submitted to J. Geophys. Res..
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Pundt, I., Pommereau, JP., Phillips, C. et al. Upper Limit of Iodine Oxide in the Lower Stratosphere. Journal of Atmospheric Chemistry 30, 173–185 (1998). https://doi.org/10.1023/A:1006071612477
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DOI: https://doi.org/10.1023/A:1006071612477