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Name: aniketh
Status: student
Age: 13
Location: N/A
Country: N/A
Date: 2000-2001


Question:
I am a class 9 student studying the UV light concentrations in different parts of world. Do you have any data on UV light concentrations,as measured by a photometer, in different countries.


Replies:
Like so many inquiries, the answer depends upon how sophisticated an answer one is looking for. For example, the website http://www.geog.ouc.bc.ca/physgeog/contents/6i.html discusses the effect of [insolation], the angle of incidence, the length of the day, and the annual changes in solar radiation [of all wavelengths] striking the earth. In addition, the altitude of the site, the number of sunny/cloudy days per year, the wavelenth of U.V. radiation. So the response can be pretty involved.

With that caveat, there are two other websites [with many links] that address this question directly:

http://www.hao.ucar.edu/public/asr/asr95/ultraviolet.html
http://sohowww.nascom.nasa.gov/descriptions/experiments/sumer/

The acronym SUMER stands for Solar Ultraviolet Measurement Emitted Radiation. I think that Aniketh can browse these sources and with her teacher decide just how sophisticated an answer is needed.

Vince Calder





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