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Australia and New Zealand recommend direct sun exposure in the article. They are telling us, it turns out.

raverbashing 8y ago
Direct sun exposure when the UV index is under 3 That's before 9am or after 6pm around this week https://uv.willyweather.com.au/nsw/sydney/sydney.html https://uv.willyweather.com.au/nsw/sydney/sydney.html
- petecox 8y ago
  Yep and that's a UV index of 13 [Extreme] even whilst cloudy. Australia and New Zealand have the highest melanoma rates in the world. We thus have a paranoia of "taking care not to burn", during office hours when UV is most intense.
- sornen 8y ago
  The problem here is that UVB levels, required for vitamin D synthesis, decrease dramatically before 9am and after 6pm, whereas UVA does not. The best option for vitamin D synthesis is short sun exposure around midday.
nazgul17 8y ago
That's a misconception, if I remember correctly. The ozone layer is over Antarctica. UV levels here (Australia) are high because the air is quite dry and clean (so I have heard). During summer (i.e. now) the UV index reaches 13 daily.
- raverbashing 8y ago
  See the image: http://www.abc.net.au/science/articles/2008/09/17/2367117.htm?site=science/talkingscience&topic=enviro&listaction=unsubscribe http://www.abc.net.au/science/articles/2008/09/17/2367117.ht... It seems to vary over Australia but I'm not sure how far from the normal values this is
  - nazgul17 8y ago
    That's literally the first time I see that visualisation. Check this out: Does the Antarctic Ozone Hole ever come over Australia? No. The ozone hole has only ever been observed to be well south of the Australian mainland and Tasmania. In fact, during springtime, when the hole is in existence, ozone levels over southern Australian cities are at their highest. Source: Australian bureau of meteorology http://www.bom.gov.au/uv/faq.shtml http://www.bom.gov.au/uv/faq.shtml You can also check the Wikipedia page on the ozone hole, where the image showing the largest extent of the hole (2006) doesn't cover Australia Source: https://en.m.wikipedia.org/wiki/Ozone_depletion https://en.m.wikipedia.org/wiki/Ozone_depletion
amanzi 8y ago
Here are some interesting charts showing forecast and actual-measured UV index around NZ: https://www.niwa.co.nz/our-services/online-services/uv-and-ozone/yesterdays-uv-index https://www.niwa.co.nz/our-services/online-services/uv-and-o... And some explanation behind UV reporting: https://www.niwa.co.nz/our-services/online-services/uv-and-ozone/uv-index-information https://www.niwa.co.nz/our-services/online-services/uv-and-o...

Direct sun exposure when the UV index is under 3 That's before 9am or after 6pm around this week https://uv.willyweather.com.au/nsw/sydney/sydney.html https://uv.willyweather.com.au/nsw/sydney/sydney.html

petecox 8y ago
Yep and that's a UV index of 13 [Extreme] even whilst cloudy. Australia and New Zealand have the highest melanoma rates in the world. We thus have a paranoia of "taking care not to burn", during office hours when UV is most intense.
sornen 8y ago
The problem here is that UVB levels, required for vitamin D synthesis, decrease dramatically before 9am and after 6pm, whereas UVA does not. The best option for vitamin D synthesis is short sun exposure around midday.

nazgul17 8y ago

That's a misconception, if I remember correctly. The ozone layer is over Antarctica. UV levels here (Australia) are high because the air is quite dry and clean (so I have heard). During summer (i.e. now) the UV index reaches 13 daily.

raverbashing 8y ago
See the image: http://www.abc.net.au/science/articles/2008/09/17/2367117.htm?site=science/talkingscience&topic=enviro&listaction=unsubscribe http://www.abc.net.au/science/articles/2008/09/17/2367117.ht... It seems to vary over Australia but I'm not sure how far from the normal values this is
- nazgul17 8y ago
  That's literally the first time I see that visualisation. Check this out: Does the Antarctic Ozone Hole ever come over Australia? No. The ozone hole has only ever been observed to be well south of the Australian mainland and Tasmania. In fact, during springtime, when the hole is in existence, ozone levels over southern Australian cities are at their highest. Source: Australian bureau of meteorology http://www.bom.gov.au/uv/faq.shtml http://www.bom.gov.au/uv/faq.shtml You can also check the Wikipedia page on the ozone hole, where the image showing the largest extent of the hole (2006) doesn't cover Australia Source: https://en.m.wikipedia.org/wiki/Ozone_depletion https://en.m.wikipedia.org/wiki/Ozone_depletion

amanzi 8y ago

Here are some interesting charts showing forecast and actual-measured UV index around NZ: https://www.niwa.co.nz/our-services/online-services/uv-and-ozone/yesterdays-uv-index https://www.niwa.co.nz/our-services/online-services/uv-and-o... And some explanation behind UV reporting: https://www.niwa.co.nz/our-services/online-services/uv-and-ozone/uv-index-information https://www.niwa.co.nz/our-services/online-services/uv-and-o...