The relationship between erythemal UV and ozone, derived from spectral irradiance measurements

• Published in: Geophysical research letters Vol. 18; no. 12; pp. 2269 - 2272
• Main Authors: McKenzie, R. L., Matthews, W. A., Johnston, P. V.
• Format: Journal Article
• Language: English
• Published: Washington, DC Blackwell Publishing Ltd 01.12.1991; American Geophysical Union
• Subjects: Attenuation; Earth, ocean, space; Exact sciences and technology; External geophysics; Geophysics; Grounds; Irradiance; Meteorology; Ozone; Radiative transfer. Solar radiation; Sky; Spectra; Zenith; New Zealand; Oceania; Lauder, New Zealand; Ultraviolet radiation; Solar zenithal distance; Clouds; Solar radiation; Total ozone content
• ISSN: 0094-8276; 1944-8007
• DOI: 10.1029/91GL02786

Spectral measurements of solar ultraviolet (UV) radiation received at the ground at Lauder, New Zealand (45°S) during 1990 are used in conjunction with ozone total column measurements to investigate the relative importance to erythemally active UV radiation of variations in solar zenith angle, ozone, and cloud cover. At this site solar zenith angle variations are the dominant factor, but clouds frequently attenuate the clear sky irradiances by more than 50%. Ozone reductions of 1% typically cause an increase in erythemally active UV irradiance of 1.25±0.20%.