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Why the sky here is white most of the time.

 
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Weigookin74



Joined: 26 Oct 2009

PostPosted: Fri Feb 06, 2015 8:47 am    Post subject: Why the sky here is white most of the time. Reply with quote

Interesting reasons. I always assumed it was mostly yellow dust and humid air over here. But, it's more pollution than I realized why there's whitish sky and the mountains can't be seen clearly.

http://mynasadata.larc.nasa.gov/what-color-is-your-sky/


Background:
As rainbows and prisms demonstrate, sunlight is comprised of the full range of colors from violet to red. When viewed together, the violet, blue, green, yellow and red colors of sunlight appear white. Isaac Newton was the first person to explain this.

Sometimes thick pollution causes the sky to appear white, but a clean sky is blue. Why?

Air is made mainly from molecules of nitrogen and oxygen with a dose of argon, water vapor, carbon dioxide and traces of many other gases. Together, as Lord Rayleigh explained, the molecules of these gases scatter the blue colors of sunlight much more effectively than the green and red colors. Therefore, a clean sky appears blue.

In many places air pollution causes haze that causes the sky to appear pale blue or even milky white. Layers of air pollution can cause the sky over the horizon to appear brown or gray. Air pollution can take many forms. It can be gases and vapors, mists and droplets or tiny particles of carbon or other materials. It can even be all the above!

The GLOBE Program has developed a general classification guide for sky color:

Deep blue (unusually clear)
Blue (clear)
Light blue (somewhat hazy)
Pale blue (very hazy)
Milky (extremely hazy)
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nicwr2002



Joined: 17 Aug 2011

PostPosted: Fri Feb 06, 2015 6:46 pm    Post subject: Re: Why the sky here is white most of the time. Reply with quote

Weigookin74 wrote:
Interesting reasons. I always assumed it was mostly yellow dust and humid air over here. But, it's more pollution than I realized why there's whitish sky and the mountains can't be seen clearly.

http://mynasadata.larc.nasa.gov/what-color-is-your-sky/


Background:
As rainbows and prisms demonstrate, sunlight is comprised of the full range of colors from violet to red. When viewed together, the violet, blue, green, yellow and red colors of sunlight appear white. Isaac Newton was the first person to explain this.

Sometimes thick pollution causes the sky to appear white, but a clean sky is blue. Why?

Air is made mainly from molecules of nitrogen and oxygen with a dose of argon, water vapor, carbon dioxide and traces of many other gases. Together, as Lord Rayleigh explained, the molecules of these gases scatter the blue colors of sunlight much more effectively than the green and red colors. Therefore, a clean sky appears blue.

In many places air pollution causes haze that causes the sky to appear pale blue or even milky white. Layers of air pollution can cause the sky over the horizon to appear brown or gray. Air pollution can take many forms. It can be gases and vapors, mists and droplets or tiny particles of carbon or other materials. It can even be all the above!

The GLOBE Program has developed a general classification guide for sky color:

Deep blue (unusually clear)
Blue (clear)
Light blue (somewhat hazy)
Pale blue (very hazy)
Milky (extremely hazy)


Yea, now is the season for hazy skies. Just look at this air pollution map.

http://aqicn.org/map/southkorea/
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Stan Rogers



Joined: 20 Aug 2010

PostPosted: Sat Feb 07, 2015 5:42 am    Post subject: Reply with quote

There is over one billion Chinese west of Korea burning coal. The winds carry it to Korea and Japan.

Dirty stuff.
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Weigookin74



Joined: 26 Oct 2009

PostPosted: Sat Feb 07, 2015 9:09 am    Post subject: Reply with quote

Stan Rogers wrote:
There is over one billion Chinese west of Korea burning coal. The winds carry it to Korea and Japan.

Dirty stuff.


Summer and spring too? Seems like just about all year here, you have so many days of whitish skies and unclear. When I see blue skies and clouds, I feel like I have to do a double take. As for todays readings, I'm surprised the southern part of Korea from Gwangju to Suncheon has the worst readings. http://aqicn.org/map/southkorea/#@g/34.8374/127.0981/7z



I would have thought it'd be Seoul.
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