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The actinic flux is the only radiometric quantity suitable for photolysisfrequency determination. It is derived from solar spectral irradiancemeasurements performed by a portable spectroradiometer in the 300–850nm wavelength range. The spectral irradiance is first divided into a directpart and a...
We have developed models of physically-based cloud and ocean surfacesfor use in photochemical models. These surface models are described in termsof a flux albedo and a normalized reflection function.Through these, the dependence of albedo on wavelength, solar zenithangle, cloud optical depth...
The first night-time observation of the vertical profile of OClO wasperformed by the AMON balloon-borne spectrometer during the SESAME arcticcampaign, launched from Kiruna in northern Scandinavia. The flight, which tookplace inside the polar vortex on February 10, 1995, reveals mixing ratios...
The soot-ozone reaction at low concentrations (ppm O3) hasbeen examined todetermine any influence of solar radiation on its products and kinetics. Theeffect of simulatedsolar radiation is to change the product distribution towardsCO2(g), CO (g) and H2O(g) at theexpense of soot surface functional...
Observations of stratospheric BrO over Bremen (53°N) are reported for winter and early spring periods of 1993 and 1993/94. The BrO was observed by ground-based near-UV absorption spectroscopy of sunlight scattered in the zenith. Differential slant column densities for solar zenith angles...
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