Physics
Scientific paper
Jan 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25...43j&link_type=abstract
Geophysical Research Letters, Volume 25, Issue 1, p. 43-46
Physics
11
Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions, Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties, Atmospheric Composition And Structure: Troposphere-Composition And Chemistry
Scientific paper
Methyl bromide is reactively removed from air by the foliage of all 9 herbaceous, 18 deciduous, and 12 coniferous plants we have tested, in a process that appears enzymatic. Excised plant leaves yielded removal rates directly proportional to leaf surface area and first-order in CH3Br concentration from 10 ppmv to 500 pptv, the current limit of our experimental technique. Observed rate constants for different plants vary within a factor of about 100 with a lower value of 1×10-3hr-1cm-2 in systems where the rate is not diffusion limited. This sink for atmospheric CH3Br could be significant in calculations of the global methyl bromide budget.
Jeffers Peter M.
Nzengung Valentine
Wolfe Lee N.
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