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originally posted by: GaryN
I read about how, for the first time, last year they altered the axis of the ISS to get a better look at UV levels from the Sun, something was going on I guess. Lately we have had UV ratings of 9 here in the Pacific NW, pretty high for us, though I have read of 15's in Texas and Australia, and up a mountain in Bolivia, they had a reading of 43 or so. That is supposedly the value they will be dealing with on Mars, with its thinner atmosphere letting in more solar UV. So what I wondered is the UV rating in space, or on the Moon with no atmosphere to block any UV? I don't see a simple answer anywhere, I'm sure there must be an ATS member with an answer.
originally posted by: engvbany
In the long term, no correlation between sunspot numbers and climate ...
en.wikipedia.org...
originally posted by: SonOfTheLawOfOne
originally posted by: engvbany
In the long term, no correlation between sunspot numbers and climate ...
en.wikipedia.org...
Sure... because 2,000+ years before present, we did a fantastic job at keeping records of both temperature and sunspots.
originally posted by: JadeStar
originally posted by: SonOfTheLawOfOne
originally posted by: engvbany
In the long term, no correlation between sunspot numbers and climate ...
en.wikipedia.org...
Sure... because 2,000+ years before present, we did a fantastic job at keeping records of both temperature and sunspots.
Nature did. We've learned how to read what she preserved in things like ice cores at the poles and tree rings.
Amazing that someone on a site whose motto is Deny Ignorance in a science forum wouldn't know that.
at Earth's (and Moon's) distance from the Sun should be around 400.
Can you explain how they knew back in the time referenced, there were no sun spots? How could they even know that?
originally posted by: Arbitrageur
a reply to: stirling
No matter what the anomaly is, they usually claim it proves their "model", even if it doesn't.
This solar cycle is proving to be one of the more unusual cycles in recent times.
The sun went about 70 years without many sunspots from 1645-1715 during the Maunder minimum, so it's always possible we could have another such period though it's too soon to say if that's happening again:
en.wikipedia.org...
The maunder minimum seemed to have some correlation to lower temperatures in Europe as did the other minimums of sunspot activity, but whether this was representative of global temperature isn't certain. The time scale of your graph is a lot longer and I don't even see the maunder minimum on it.
originally posted by: engvbany
In the long term, no correlation between sunspot numbers and climate ...
Like the Dalton Minimum and Spörer Minimum, the Maunder Minimum coincided with a period of lower-than-average European temperatures...
The Maunder Minimum coincided with the middle part of the Little Ice Age, during which Europe and North America were subjected to very cold winters.
The bright regions on the Sun that surround sunspots are called faculae. Although sunspots reduce the amount of energy radiated from the Sun, the faculae associated with them increase the radiated energy even more, so that overall, the total amount of energy emitted by the Sun increases during periods of high sunspot activity.