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Studying Chronic Exposure of Mice to Ultraviolet B Radiation

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Published on: August 19, 2025

Variability in UVB radiation in Beijing, China.

Hu Bo¹, Zhang Xinghua, Wang Yuesi

¹State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China. hbooo@163.com

Photochemistry and Photobiology

|January 31, 2013

Summary

This study analyzed Ultraviolet-B (UVB) radiation in Beijing, finding seasonal variations and influences from ozone and cloud cover. UVB radiation levels fluctuated significantly throughout the year, impacting solar radiation ratios.

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Area of Science:

Atmospheric Science
Solar Radiation Physics

Background:

Ultraviolet-B (UVB) radiation is crucial for atmospheric studies.
Understanding UVB variability is essential for environmental and health research.

Purpose of the Study:

To investigate the variation characteristics of UVB radiation in Beijing.
To analyze the influence of ozone and clearness index on the UVB to broadband solar radiation ratio (G).

Main Methods:

Utilized measured data from Beijing spanning November 2010 to October 2011.
Examined seasonal variations and the impact of atmospheric factors on UVB radiation.

Main Results:

Annual UVB radiation in Beijing averaged 6.37 MJ m(-2), with significant monthly and daily fluctuations.
The ratio of UVB to G averaged 0.012%, exhibiting an annual cycle influenced by ozone and increasing over 17% under cloudy conditions.

Conclusions:

UVB radiation in Beijing shows distinct seasonal patterns.
Ozone and cloudiness are key factors modulating UVB radiation and its ratio to total solar radiation.