I recorded 9.6 today, and thought that was a bit high.
The sky was the bluest I have ever seen it!
However, I checked DEFRA's website showing official UV levels in Camborne, and they recorded 9.5. Even Leeds recorded 8.8 - 8.9
What's the reasoning behind the high levels? Lack of Ozone?
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Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Cumulus MX V4 beta test release 4.0.0 (build 4019) - 03 April 2024
Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
Very high UV levels
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freddie
- Posts: 2481
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Re: Very high UV levels
A very warm and relatively thick/deep troposphere with a compensatory thinner/shallower stratosphere above. The stratosphere is where the ozone is. This is part of the reason. The other part is the relatively high water vapour content in the lower part of the current airmass with relatively dry air above. Also, if you have any low-level cloud around - especially thin stratus - it can contribute to the level sensed by your sensor via reflection and refraction.
Freddie
