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Nonmethane hydrocarbon chemistry in the remote marine boundary layerA photochemical model of the remote marine boundary layer (MBL) is presented, with focus placed on the role of reactive nonmethane hydrocarbons (NMHC). A wide range of NMHC air-sea fluxes with various relative distributions of NMHC regions are considered. In particular, the flux magnitude at which NMHC emissions become significant, and then dominant, players in MBL chemistry is identified. Emphasis is placed on diurnal variability, diurnal ozone variations and sensitivity to NMHC emission fluxes, to CO, O3, H2O, and UV light, and to kinetics and isometric composition. Model runs indicate that, in the range consistent with current observations, the NMHCs may either dominate MBL chemistry, or simply be contributors at the 10-percent level. These model runs also show that existing observations of NMHCs in ocean water find them to scarce for fluxes from bulk-flux air-sea gas exchange models to be consistent with the fluxes needed in the proposed model to maintain the lowest observed MBL NMHC.
Document ID
19910028487
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Donahue, Neil M.
Prinn, Ronald G.
(MIT Cambridge, MA, United States)
Date Acquired
August 14, 2013
Publication Date
October 20, 1990
Publication Information
Publication: Journal of Geophysical Research
Volume: 95
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
91A13110
Funding Number(s)
CONTRACT_GRANT: NSF ATM-87-10102
Distribution Limits
Public
Copyright
Other

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