Stable carbon isotope ratio of methyl chloride emitted from glasshouse-grown tropical plants and its implication for the global methyl chloride budget

Details Stable carbon isotope ratio of methyl chloride emitted from glasshouse-grown tropical plants and its implication for the global methyl chloride budget Stable carbon isotope ratio of methyl chloride emitted from glasshouse-grown tropical plants and its implication for the global methyl chloride budget

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3508807s&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 8, CiteID L08807

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5

Atmospheric Composition And Structure: Troposphere: Composition And Chemistry, Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions (0426, 1610), Geochemistry: Stable Isotope Geochemistry (0454, 4870), Biogeosciences: Isotopic Composition And Chemistry (1041, 4870), Atmospheric Composition And Structure: Instruments And Techniques

Scientific paper

Stable carbon isotope ratios of methyl chloride (CH3Cl) were measured in foliar emissions from 14 species of tropical plants growing in a glasshouse. The isotopic ratio of CH3Cl (arithmetic mean: -83.2 +/- 15.2‰) ranged from -56‰ to -114‰ that from dipterocarp trees (-87.4 +/- 12.3‰) was on average more depleted in 13C than that from tree ferns (-61.9 +/- 9.7‰). The isotopic ratio was lower than that of CH3Cl produced by other known sources (e.g., biomass burning and salt marshes), with the exception of that by dead leaves. Using the distinctive isotope ratio of CH3Cl emitted from tropical plants together with previously reported isotopic data of CH3Cl sources and sinks to an isotopic mass balance calculation, global CH3Cl emission by tropical plants was estimated to be approximately 1500-3000 Gg yr-1 with uncertainties of 30-60%, which could account for 30-50% of the global emission.

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