Abstract
A balloon-borne continuous actinometer has been developed which measures stratospheric N2O photolysis coefficients, % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9% vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x% fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOAamaaBa% aaleaacaGGobWaaSbaaWqaaiaaikdaaeqaaSGaci4taiabg2da9iab% gkHiTiGacsgaciGGSbGaaiOBaiaacIcaciGGobWaaSbaaWqaaiaaik% daaeqaaSGaci4taiGacMcacaGGVaGaciizaiaadshaaeqaaaaa!44F2!\[j_{N_2 \operatorname{O} = - \operatorname{d} \ln (\operatorname{N} _2 \operatorname{O} )/\operatorname{d} t} \], with a time resolution of approximately 100 s, and a lower detection limit approaching 10-10 s-1. The instrument performed successfully, or was at least partially successful, on five stratospheric balloon flights between October 1982 and September 1986. The experimental profiles are compared with model calculations of % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9% vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x% fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOAamaaBa% aaleaacaGGobWaaSbaaWqaaiaaikdaaeqaaSGaci4taaqabaaaaa!39A3!\[j_{N_2 \operatorname{O} } \]. The model takes full account of the sphericity of the atmosphere and of the specific flight conditions, but neglects scattering, which should have a negligible effect on % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9% vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x% fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOAamaaBa% aaleaacaGGobWaaSbaaWqaaiaaikdaaeqaaSGaci4taaqabaaaaa!39A3!\[j_{N_2 \operatorname{O} } \]. The quantitative results, particularly the altitude and solar zenith angle dependences under extreme conditions, support the low absorption cross-sections of oxygen in the Herzberg continuum as recommended by WMO in 1986 and are inconsistent with Ackerman's tabulations of 1971. It is shown that the altitude dependence of Brewer and Wilson's historical irradiance measurements in the stratospheric window region is well reproduced by our model, but should be multiplied by a factor of 1.75.
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References
Ackerman, M., 1971, Ultraviolet solar radiation related to mesospheric processes, in Fiocco (ed.), Mesospheric Models and Related Experiments, D. Reidel, Dordrecht, pp. 149–159.
Allen, M. and Frederick, J. E., 1982, Effective photodissociation cross sections for molecular oxygen and nitric oxide in the Schumann-Runge bands, J. Atmos. Sci. 39, 2066–2075.
Anderson, G. P. and Hall, L. A., 1983, Attenuation of solar irradiance in the stratosphere: spectrometer measurements between 191 and 207 nm, J. Geophys. Res. 88, 6801–6806.
Anderson, G. P. and Hall, L. A., 1986, Stratospheric determination of O2 cross sections and photodissociation rate coefficients: 191–215 nm, J. Geophys. Res. 91, 14509–14514.
Arnold, F. and Qiu, S., 1984, Upper stratosphere negative ion composition measurements and inferred trace gas abundances, Planet. Space Sci. 32, 169–177.
Barnett, J. J. and Corney, M., 1985, Middle atmosphere reference model derived from satellite data, Handbook for MAP 16, 47–85.
Brewer, A. W. and Wilson, A. W., 1965, Measurements of solar ultraviolet radiation in the stratosphere, Q.J.R. Meteorol. Soc. 91, 452–461.
Chapman, S., 1931, The absorption and dissociative or ionizing effect of monochromatic radiation in an atmosphere on a rotating earth. II, Grazing incidence, Proc. Phys. Soc. 43, 483–501.
Cheung, A. S.-C., Yoshino, K., Parkinson, W. H., and Freeman, D. E., 1984a, Herzberg continuum cross section of oxygen in the wavelength region 193.5–204.0 nm: new laboratory measurements and stratospheric implications, Geophys. Res. Lett. 11, 580–582.
Cheung, A. S.-C., Yoshino, K., Parkinson, W. H., and Freeman, D. E., 1984b, Herzberg continuum cross section of oxygen in the wavelength region 193.5–204.0 nm and band oscillator strengths of the (0, 0) and (1, 0) Schumann-Runge bands, Can. J. Phys. 62, 1752–1762.
Cheung, A. S.-C., Yoshino, K., Parkinson, W. H., Guberman, S. L., and Freeman, D. E., 1986, Absorption cross section measurements of oxygen in the wavelength region 195–241 nm of the Herzberg continuum, Planet. Space Sci. 34, 1007–1021.
Crutzen, P. J., 1975, A two-dimensional photochemical model of the atmosphere below 55 km: estimates of natural and man-caused ozone perturbations due to NO x , Proc. Fourth Conf. Climatic Impact Assessment Program, U.S. Dept. of Transportation, pp. 264–279.
Crutzen, P. J. and Schmailzl, U., 1983, Chemical budgets of the stratosphere, Planet. Space Sci. 31, 1009–1032.
Davidson, J. A., Howard, C. J., Schiff, H. I., and Fehsenfeld, F. C., 1979, Measurements of the branching ratios for the reaction of O(1 D2) with N2O, J. Chem. Phys. 70, 1697–1704.
Dickerson, R. R., Stedman, D. H., and Delany, A. C., 1982, Direct measurements of ozone and nitrogen dioxide photolysis rates in the troposphere, J. Geophys. Res. 87, 4933–4946.
Duffett-Smith, P., 1985, Astronomy with Your Personal Computer, Cambridge University Press, Cambridge.
Frederick, J. E., Hudson, R. D., and Mentall, J. E., 1981, Stratospheric observations of the attenuated solar irradiance in the Schumann-Runge band absorption region of molecular oxygen, J. Geophys. Res. 86, 9885–9890.
Frederick, J. E. and Mentall, J. E., 1982, Solar irradiance in the stratosphere: implications for the Herzberg continuum absorption of O2, Geophys. Res. Lett. 9, 461–464.
Hans, W., Kessler, C., and Schurath, U., 1985, Altitude resolved measurements of the N2O photolysis frequency in the stratosphere, in C. S. Zerefos and A. Ghazi (eds.), Atmospheric Ozone, proceedings of the Quadrennial Ozone Symposium, Halkidiki, Greece, D. Reidel, Dordrecht, pp. 640–644.
Helten, M., Pätz, W., Trainer, M., Fark, H., Klein, E., and Ehhalt, D. H., 1984, Measurements of stratospheric HO2 and NO2 by matrix isolation and ESR spectroscopy, J. Atmos. Chem. 2, 191–202.
Herman, J. R. and Mentall, J. E., 1982a, O2 absorption cross sections (187–225 nm) from stratospheric solar flux measurements, J. Geophys. Res. 87, 8967–8975.
Herman, J. R. and Mentall, J. E., 1982b, The direct and scattered solar flux within the stratosphere, J. Geophys. Res. 87, 1319–1330.
Herman, J. R. and Mentall, J. E., 1985, Photolysis rates based on Schumann-Runge band approximations and irradiance measurements, Geophys. Res. Lett. 12, 659–662.
Jenouvrier, A., Coquart, B., and Merienne-Lafore, M. F., 1986a, New measurements of the absorption cross-sections in the Herzberg continuum of molecular oxygen in the region between 205 and 240 nm, Planet. Space Sci. 34, 253–254.
Jenouvrier, A., Coquart, B., and Merienne, M. F., 1986b, Long pathlength measurements of oxygen absorption cross sections in the wavelength region 205–240 nm, J. Quant. Spectrosc. Radiat. Transfer 36, 349–354.
Johnston, H. S. and Selwyn, G. S., 1975, New cross sections for the absorption of near ultraviolet radiation by nitrous oxide (N2O), Geophys. Res. Lett. 2, 549–551.
Johnston, H. S., Paige, M., and Yao, F., 1984, Oxygen absorption cross sections in the Herzberg continuum and between 206 and 327 K, J. Geophys. Res. 89, 11661–11665.
JPL, 1987, Chemical Kinetics and Photochemical Data for Use in Stratospheric Modeling, Evaluation No. 8, NASA Panel for Data Evaluation, JPL publication 87–41, Pasadena, CA.
Knoot, P. and Reeves, R. R.Jr., 1978, Measurement of solar radiation at ground level in the region 1950–2150 Å using ammonia actinometry, J. Geophys. Res. 83, 4044–4046.
Krueger, A. J. and Minzner, R. A., 1976, A mid-latitude ozone model for the 1976 U.S. Standard Atmosphere, J. Geophys. Res. 81, 4477–4481.
Lam, L., Hastie, D. R., Ridley, B. A., and Schiff, H. I., 1981, Measurements of the relative rate constants for the quenching of O(1 D) atoms by N2O and N2 and the branching ratio of the N2O reaction at 23 and-96°C, J. Photochem. 15, 119–130.
Lewis, B. R., Berzins, L., and Carver, J. H., 1986a, Oscillator strengths for the Schumann-Runge bands of 16O2, J. Quant. Spectrosc. Radiat. Transfer 36, 209–232.
Lewis, B. R., Berzins, L., Carver, J. H., and Gibson, S. T., 1986b, Rotational variation of predissociation linewidth in the Schumann-Runge bands of 16O2, J. Quant. spectrosc. Radiat. Transfer 36, 187–207.
Madronich, S., 1987, Intercomparison of NO2 photodissociation and UV radiometer measurements, Atmos. Environ. 21, 569–578.
Madronich, S., Hastie, D. R., Schiff, H. I., and Ridley, B. A., 1985, Measurement of the photodissociation coefficient of NO2 in the atmosphere: II, stratospheric measurements, J. Atmos. Chem. 3, 233–245.
Marić, D., 1988, Messungen der N2O-Photolysefrequenz in der Stratosphäre: Vergleich mit Modellrechnungen, Dissertation, University of Bonn.
Marx, W., Bahe, F., and Schurath, U., 1979, The NO yield of O(1 D)+N2O as function of kinetic energy, Ber. Bunsenges. Phys. Chem. 83, 225–230.
Meeus, J., 1982, Astronomical Formulae for Calculators, (2nd. edn.) Willmann-Bell, Virginia.
Molina, L. T. and Molina, M. J., 1986, Absolute absorption cross sections of ozone in the 185 to 350 nm wavelength range, J. Geophys. Res. 91, 14501–14508.
Müller, R. and Schurath, U., 1986, Entwicklung eines Gerätes zur kontinuierlichen Messung der Photodissoziations- Geschwindigkeit von Aldehyden in der Atmosphäre durch Nachweis des erzeugten CO, BPT-Report 11/86, Gesellschaft für Strahlen- und Umweltforschung mbH, Munich.
Nicolet, M. and Kennes, R., 1986, Aeronomic problems of the molecular oxygen photodissociation — I. The O2 Herzberg continuum, Planet. Space Sci. 34, 1043–1059.
Nicolet, M., Cieslik, S., and Kennes, R., 1987, Rotational structure and absorption cross sections from 300 to 190 K of the Schumann-Runge bands, Aeronomica Acta A No. 318.
De la Noé, J., Brillet, J., Turati, C., Mégie, G., Godin, S., Pelon, J., Marché, P., Barbe, A., Gibbins, C. J., Dawkins, A. W. J., and Matthews, W. A., 1987, Remote and ground-based measurements of ozone profiles during the MAP/GLOBUS 1983 campaign, Planet. Space Sci. 35, 547–562.
Pirre, M., Rigaud, P., and Huguenin, D., 1984, New in-situ measurements of the absorption cross-sections of O2 in the Herzberg continuum, Geophys. Res. Lett. 11, 1199–1202.
Preston, K. F. and Barr, R. F., 1971, Primary processes in the photolysis of nitrous oxide, J. Chem. Phys. 54, 3347–3348.
Qiu, S. and Arnold, F., 1984, Stratospheric in situ measurements of H2SO4 and HSO3 vapors during a volcanically active period, Planet. Space Sci. 32, 87–95.
Schlager, H. and Arnold, F., 1985, Balloon-borne fragment ion mass spectrometry studies of stratospheric positive ions: unambiguous detection of H+(CH3CN)1(H2O) m -clusters, Planet. Space Sci. 33, 1363–1366.
Schlager, H. and Arnold, F., 1987, Balloon-borne composition measurements of stratospheric negative ions and inferred sulfuric acid vapor abundances during the MAP/GLOBUS 1983 campaign, Planet. Space Sci. 35, 693–701.
Selwyn, G., Podolske, J., and Johnston, H. S., 1977, Nitrous oxide ultraviolet absorption spectrum at stratospheric temperatures, Geophys. Res. Lett. 4, 427–430.
Turco, R. P., 1975, Photodissociation rates in the atmosphere below 100 km, Geophys. Surv. 2, 153–192.
Webster, C. R. and May, R. D., 1987, Simultaneous in situ measurements and diurnal variations of NO, NO2, O3, j NO 2, CH4, H2O, and CO2 in the 40 to 26 km region using an open path tunable diode laser spectrometer, J. Geophys. Res. 92, 11931–11950.
Wine, P. H. and Ravishankara, A. R., 1982, O3 photolysis at 248 nm and O(1 D 2) quenching by H2O, CH4, H2, and N2O: O(3PJ) yields, Chem. Phys. 69, 365–373.
Withnall, R. and Sodeau, J. R., 1986, A fourier-transform infrared investigation of the gas-phase photolysis of nitrous oxide at 184.9 nm, J. Chem. Soc. Faraday Trans. 2, 82, 415–421.
WMO, 1986, Atmospheric Ozone 1985, World Meteorological Organization Global Ozone Research and Monitoring Project, Report No. 16, Geneva, Switzerland.
Yoshino, K., Freeman, D. E., Esmond, J. R., and Parkinson, W. H., 1983, High resolution absorption cross section measurements and band oscillator strengths of the (1, 0)–(12, 0) Schumann-Runge bands of O2, Planet. Space Sci. 31, 339–353.
Yoshino, K., Freeman, D. E., Esmond, J. R., and Parkinson, W. H., 1987, High resolution absorption cross-sections and band oscillator strengths of the Schumann-Runge bands of oxygen at 79 K, Planet. Space Sci. 35, 1067–1075.
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Marić, D., Hans, W. & Schurath, U. Measurements of N2O photolysis coefficients in the stratosphere: Comparison with model calculations. J Atmos Chem 8, 19–40 (1989). https://doi.org/10.1007/BF00053814
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DOI: https://doi.org/10.1007/BF00053814
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- % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9% vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x% fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamOAamaaBa% aaleaacaGGobWaaSbaaWqaaiaaikdaaeqaaSGaci4taaqabaaaaa!39A3!\[j_{N_2 \operatorname{O} } \]
- N2O photolysis
- actinometer
- stratospheric photochemistry
- % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9% vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x% fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeq4Wdm3aaS% baaSqaaiaac+eadaWgaaadbaGaaGOmaaqabaaaleqaaaaa!39A3!\[\sigma _{O_2 } \]
- stratospheric irradiance