Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.509 IF 5.509
  • IF 5-year value: 5.689 IF 5-year 5.689
  • CiteScore value: 5.44 CiteScore 5.44
  • SNIP value: 1.519 SNIP 1.519
  • SJR value: 3.032 SJR 3.032
  • IPP value: 5.37 IPP 5.37
  • h5-index value: 86 h5-index 86
  • Scimago H index value: 161 Scimago H index 161
Discussion papers
https://doi.org/10.5194/acp-2018-828
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2018-828
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 06 Sep 2018

Research article | 06 Sep 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).

Relationship between erythema effective UV radiant exposure, total ozone and cloud cover in southern England UK: 1991–2015

Nezahat Hunter, Rebecca J. Hooke, Michael P. Higlett, John B. O'Hagan, and Richard G. E. Haylock Nezahat Hunter et al.
  • Public Health England, Chilton, Didcot, Oxfordshire, OX11 0RQ, UK

Abstract. The long-term trend over 25 years of solar ultraviolet radiation measurements at Chilton in the south of England (51.6°N, 1.3°W) has been investigated. Changes in erythema effective UV radiant exposure (Her) were studied in relation to total ozone and cloud cover by examining variation in the corrected monthly mean data.

The statistical analyses showed that the long-term variability of Her can be best characterised in two sub-periods. In the first period between 1991 and 2004 Her showed a small significant increasing linear trend of 1.01% per year (95% CI: 0.75%; 1.27%) while during the second period, between 2004 and 2015, Her showed a small significant decreasing trend of 1.35% per year (95% CI: −1.98%; −0.77%). Changes in Her in relation to the combined effect of total ozone and cloud cover in southern England were investigated for each sub-period. Both cloud cover and total ozone were found to have a highly statistically significant influence on Her. Over the period 1991–2004, cloud cover explained the largest variation in Her (47%), whilst total ozone explained only 8% of the changes in Her. For the second period 2004–2015, this pattern is reversed with total ozone having a greater effect on Her variation (33%) than cloud cover (16%). When the data were examined separately for each season, the largest correlation between Her and total ozone and cloud cover was found during spring for both sub-periods.

This study provides robust evidence that the increasing trend in Her over the period 1991–2004 was most strongly associated with the observed reduction in cloud cover and to a lesser degree with the upward trend in total ozone. The decreasing trend in Her for the period 2004–2015 may be explained by a combination of the marginal evidence of observed upward trend in total ozone and the absence of a statistically significant decreasing trend in cloud cover.

Nezahat Hunter et al.
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Login for Authors/Co-Editors] [Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Nezahat Hunter et al.
Nezahat Hunter et al.
Viewed
Total article views: 257 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
206 48 3 257 1 1
  • HTML: 206
  • PDF: 48
  • XML: 3
  • Total: 257
  • BibTeX: 1
  • EndNote: 1
Views and downloads (calculated since 06 Sep 2018)
Cumulative views and downloads (calculated since 06 Sep 2018)
Viewed (geographical distribution)
Total article views: 257 (including HTML, PDF, and XML) Thereof 257 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited
Saved
Discussed
No discussed metrics found.
Latest update: 15 Nov 2018
Publications Copernicus
Download
Citation
Share