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Ozone measurements by zenith-sky spectrometers: An evaluation of errors in air-mass factors calculated by radiative transfer models

Sarkissian, A.; Roscoe, H.K.; Fish, D.J.. 1995 Ozone measurements by zenith-sky spectrometers: An evaluation of errors in air-mass factors calculated by radiative transfer models. Journal of Quantitative Spectroscopy and Radiative Transfer, 54 (3). 471-480. 10.1016/0022-4073(95)00085-Y

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Abstract/Summary

Calculations of air-mass factors (AMFs) for ground-based zenith-sky UV-visible spectrometers are presented and discussed. Causes and size of errors in AMFs of ozone in the visible are evaluated. Errors can be caused by approximations in the calculation (intensity-weight approximation, ignoring the finite field of view of the instrument); by approximation in the scheme of the calculation (single scattering, ignoring refraction); or by variable geophysical parameters (vertical profile of constituents). These relative errors in AMF cause identical relative errors in vertical columns of ozone deduced from measurements by zenith-sky spectrometers. The mean of the relative errors of ozone AMFs due to using one set of AMFs for all seasons and locations is ±2.4% when averaged over the commonly used range of solar zenith angles.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/0022-4073(95)00085-Y
Programmes: BAS Programmes > Pre 2000 programme
ISSN: 00224073
Date made live: 11 Jan 2017 11:24 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/515791

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