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Heterogeneous Chemistry Involving Methanol in Tropospheric CloudsIn this report we analyze airborne measurements to suggest that methanol in biomass burning smoke is lost heterogeneously in clouds. When a smoke plume intersected a cumulus cloud during the SAFARI 2000 field project, the observed methanol gas phase concentration rapidly declined. Current understanding of gas and aqueous phase chemistry cannot explain the loss of methanol documented by these measurements. Two plausible heterogeneous reactions are proposed to explain the observed simultaneous loss and production of methanol and formaldehyde, respectively. If the rapid heterogeneous processing of methanol, seen in a cloud impacted by smoke, occurs in more pristine clouds, it could affect the oxidizing capacity of the troposphere on a global scale.
Document ID
20050177924
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Tabazadeh, A.
(NASA Ames Research Center Moffett Field, CA, United States)
Yokelson, R. J.
(Montana Univ. Missoula, MT, United States)
Singh, H. B.
(NASA Ames Research Center Moffett Field, CA, United States)
Hobbs, P. V.
(Washington Univ. Seattle, WA, United States)
Crawford, J. H.
(NASA Langley Research Center Hampton, VA, United States)
Iraci, L. T.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2004
Publication Information
Publication: Geophysical Research Letters
Publisher: American Geophysical Union
Volume: 31
ISSN: 0094-8276
Subject Category
Geophysics
Funding Number(s)
CONTRACT_GRANT: NAG5-9022
Distribution Limits
Public
Copyright
Other

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