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Open-path tunable diode laser absorption for eddy correlation flux measurements of atmospheric trace gasesBiogenic emissions from and dry deposition to terrestrial surfaces are important processes determining the trace gas composition of the atmosphere. An instrument has been developed for flux measurements of gases such as CH4, N2O, and O3 based on the eddy correlation technique which combines trace gas fluctuation measurements with simultaneous windfield measurements. The instrument combines a tunable diode laser infrared light source with an open-path multipass absorption cell in order to provide the fast time response and short base pathlength required for the eddy correlation method. Initial field tests using the instrument to measure methane emissions from a local wetland demonstrate the capability for high precision eddy correlation flux measurements.
Document ID
19920069546
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Anderson, Stuart M.
(NASA Ames Research Center Moffett Field, CA, United States)
Zahniser, Mark S.
(Aerodyne Research, Inc. Center for Chemical and Environmental Physics, Billerica, MA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Inorganic And Physical Chemistry
Meeting Information
Meeting: Measurement of Atmospheric Gases
Location: Los Angeles, CA
Country: United States
Start Date: January 21, 1991
End Date: January 23, 1991
Accession Number
92A52170
Funding Number(s)
CONTRACT_GRANT: NAS2-12433
CONTRACT_GRANT: DE-AC01-85ER-80308
Distribution Limits
Public
Copyright
Other

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