The suns infrared output

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stephenprudence
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The suns infrared output

Post by stephenprudence » Thu Dec 26, 2013 12:35 pm

I notice today that the sun feels much warmer than I can remember at this time of year. It genuinely does feel warm. Can the infrared output of the sun vary? Or is it constant? ( ie am I simply imagining the sun feels warmer than I previously remember ?
Heswall, Wirral, UK
USDA equivalent average temperature zone: 9a/RHS zone 3
AHS Heat Zone: 1
Last 5 winter minimums:
2007: -0.1C, 2008: -4.2C, 2009: -5.7C, 2010: -10.5 (record), 2011: -4.9C, 2012: -5.3, 2013: -4.5C (so far)


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cordyman
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Re: The suns infrared output

Post by cordyman » Thu Dec 26, 2013 2:35 pm

Went on a 2 hour walk with the hoss this morning and was pretty warm in the sun. Not a patch on 2 week ago though when it was 12*c and sunny, as opposed to 1*c and sunny as it was today :lol:

So I think the overall daytime highs skewed my perception today!


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Yorkshire Kris
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Re: The suns infrared output

Post by Yorkshire Kris » Thu Dec 26, 2013 3:00 pm

Frost was still on the grass but the sun did feel warm. icon_sunny


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fern Rob
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Re: The suns infrared output

Post by fern Rob » Thu Dec 26, 2013 5:24 pm

I have been for a walk in Clumber Park today, one of the small lakes was completely iced over.
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Conifers
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Re: The suns infrared output

Post by Conifers » Thu Dec 26, 2013 9:00 pm

stephenprudence wrote:I notice today that the sun feels much warmer than I can remember at this time of year. It genuinely does feel warm. Can the infrared output of the sun vary? Or is it constant? ( ie am I simply imagining the sun feels warmer than I previously remember ?
Doubt solar IR varies significantly. So much more depends on so many other factors, notably wind speed, but also thin high cloud, humidity, mental state of the observer, gumidity, alcohol consumption, ferrets, etc., etc., etc.


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Dave Brown
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Re: The suns infrared output

Post by Dave Brown » Thu Dec 26, 2013 9:04 pm

I was inside the local hospice all day, as my mother in law is very near the end of her fight against cancer. The sun shone through the windows from about 8am, and the clarity of the atmosphere made it pleasantly warm, but when I came out briefly at lunchtime, looks were very deceptive, as it was freezing cold.

You can detect quite small changes in sunlight quality and strength, but mostly it is relative to the few days previously. For instance today it was still light (just) at 4pm where as it has been dark by 3:30pm for a few days.

Pic from hospice room this morning
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2013-12-26 sunny view from hospice.jpg
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Tom2006
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Re: The suns infrared output

Post by Tom2006 » Thu Dec 26, 2013 10:18 pm

Not here as only got to 4c!
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Re: The suns infrared output

Post by Dave Brown » Fri Dec 27, 2013 9:06 am

Tom2006 wrote:Not here as only got to 4c!
only reached 4.6C here Tom
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Re: The suns infrared output

Post by Nigel » Fri Dec 27, 2013 10:45 am

Stephen I was outside in a T-shirt at lunchtime yesterday, around mid-day the sun did indeed feel unusually warm , but i think thats because their was no wind and we have warm air over us.
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