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

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.

Details

Publication status:
Published
Author(s):
Authors: Sarkissian, A., Roscoe, H.K., Fish, D.J.

On this site: Howard Roscoe
Date:
1 January, 1995
Journal/Source:
Journal of Quantitative Spectroscopy and Radiative Transfer / 54
Page(s):
471-480
Digital Object Identifier (DOI):
https://doi.org/10.1016/0022-4073(95)00085-Y