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  • 1
    Electronic Resource
    Electronic Resource
    Measurement of the photodissociation coefficient of NO2 in the atmosphere: I. Method and surface measurements (1983)
    Springer
    Journal of atmospheric chemistry 1 (1983), S. 3-25 
    Details
    ISSN: 1573-0662
    Keywords: J NO 2 ; NO2 photolysis ; atmospheric photochemistry ; J NO 2measurement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract An instrument, specifically designed for measurements from a balloon platform in the stratosphere, has been used to obtain ground-level values of the atmospheric photodissociation coefficient of nitrogen dioxide, J NO 2.A typical clear-sky value is 8.0×10-3 s-1 when the solar zenith angle is 40°. Measurements were made as a function of solar zenith angle and correlated with a calibrated Eppley UV radiometer. It is shown that J NO 2may be expressed as a simple function of the radiometer output so that estimates of J NO 2can be made using just an upward looking radiometer to an accuracy of about 20%. The measurements are also found to be in good agreement with calculations of J NO 2using a simplified isotropic multiple scattering computer routine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00113977
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  • 2
    Electronic Resource
    Electronic Resource
    Measurement of the photodissociation coefficient of NO2 in the atmosphere: II, stratospheric measurements (1985)
    Springer
    Journal of atmospheric chemistry 3 (1985), S. 233-245 
    Details
    ISSN: 1573-0662
    Keywords: J NO 2 ; NO2 photolysis ; atmospheric photochemistry ; J NO 2 measurement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract The photodissociation coefficient of NO2, J NO 2, has been measured from a balloon platform in the stratosphere. Results from two balloon flights are reported. High Sun values of J NO 2 measured were 10.5±0.3 and 10.3±0.3×10-3 s-1 at 24 and 32 km respectively. The decrease in J NO 2 at sunset was monitored in both flights. The measurements are found to be in good agreement with calculations of J NO 2 using a simplified isotropic multiple scattering computer routine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00210498
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  • 3
    Electronic Resource
    Electronic Resource
    The effect of water vapour broadening on methane eddy correlation flux measurements (1991)
    Springer
    Journal of atmospheric chemistry 13 (1991), S. 97-108 
    Details
    ISSN: 1573-0662
    Keywords: Methane flux ; broadening coefficient ; eddy correlation technique
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract A high resolution tunable diode laser absorption spectrometer (TDLAS) was used to measure the broadening effect of water vapor and other gases (dry air, nitrogen, oxygen, hydrogen and helium) on three methane lines in the v4 fundamental. The effects on methane eddy correlation flux measurements amount to a few percent for the least broadened line for expected H2O fluxes, to ≈10% for the most broadened line for higher H2O and lower CH4 fluxes likely to be encountered. The broadening coefficients of methane measured for air, N2, O2, and He are in good agreement with recently published values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00048103
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