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Ultraviolet radiation in the Arctic - The impact of potential ozone depletions and cloud effectsThe combined effects of ozone depletions/redistributions and particulate clouds on atmospheric cheating/photolysis rates and UV radiation reaching the biosphere are investigated by means of an atmospheric radiation model. Consideration is given to four types of particulate clouds prevalent in the summertime Arctic: stratospheric aerosols, tropospheric aerosols (Arctic haze), cirrus clouds, and stratus clouds. The effects of ozone depletion and vertical redistributions of ozone are also examined. Stratus clouds are found to provide significant protection from UV radiation exposure, but while stratospheric aerosols imply increased UVB exposure, Arctic haze results in a decrease. A redistribution of ozone from the stratosphere to the troposphere tends to decrease UV exposure, but for low solar elevations an increase may occur. A 20-percent ozone depletion leads to about 0.4 K/d cooling in the lower stratosphere, while redistribution of ozone from the stratosphere to the troposphere implies a warming of about 0.015 K/d in the upper troposphere.
Document ID
19920059278
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Tsay, Si-Chee
(NASA Goddard Space Flight Center; Universities Space Research Association, Greenbelt, MD, United States)
Stamnes, Knut
(Alaska, University Fairbanks, United States)
Date Acquired
August 15, 2013
Publication Date
May 30, 1992
Publication Information
Publication: Journal of Geophysical Research
Volume: 97
Issue: D8 M
ISSN: 0148-0227
Subject Category
Environment Pollution
Accession Number
92A41902
Funding Number(s)
CONTRACT_GRANT: NSF DPP-88-16298
CONTRACT_GRANT: NSF DPP-86-18706
CONTRACT_GRANT: NAGW-2165
Distribution Limits
Public
Copyright
Other

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