NDLI: Atmospheric measurement of chemical species using spectroscopic technique

Content Provider	IEEE Xplore Digital Library
Author	Akimoto, H.
Copyright Year	1994
Description	Author affiliation: Res. Center for Adv. Sci. & Technol., Tokyo Univ., Japan (Akimoto, H.)
Abstract	Physical and chemical key parameters of the Earth's environment such as temperature, UV radiation field, oxidative capacity, acidity and etc., are determined by the amount of trace gases and aerosols in the atmosphere. It is thus of crucial importance to measure the accurate concentrations of the trace chemical component of the atmosphere for the purpose of predicting global warming, stratospheric ozone depletion, tropospheric ozone increase, and acid deposition. The concentrations of trace gases range from over 300 ppm of carbon dioxide to less than 0.1 ppt of OH radical. Several spectroscopic techniques are used to determine concentrations of these trace chemical species in the troposphere. Among these method the most sensitive is the laser induced fluorescence method which is now applied to measure OH radicals in the troposphere as well as in the stratosphere. UV absorption method is used to measure O/sub 3/ in local mode by a commercial instrument. It is also used in LIDAR mode to measure the vertical profile of ozone in both the troposphere and stratosphere. OH measurement by LIF and O/sub 3/ measurement by local UV absorption method and by UV-LIDAR method are discussed in some detail. Several examples of field measurement of OH and O/sub 3/ are also presented.
File Size	78497
File Format	PDF
ISBN	0780318803
DOI	10.1109/IMTC.1994.352142
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-05-10
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Atmospheric measurements Chemicals Spectroscopy Terrestrial atmosphere Gases Electromagnetic wave absorption Earth Temperature Aerosols Global warming
Content Type	Text
Resource Type	Article

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