gcmd_keyword : HALOCARBONS AND HALOGENS>METHYL BROMIDE

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parent	ATMOSPHERIC CHEMISTRY>HALOCARBONS AND HALOGENS

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definition	CH3Br, this halocarbon is released, to a degree, naturally from the oceans, but is more commonly released from its anthropogenic use as a soil fumigant or pesticide. Methyl bromide is persistent enough to reach the stratosphere where it photochemically decomposes to yield atomic bromine (radical) and proceeds to destroy stratospheric ozone in the same manner as the atomic chlorine radical. On an atom-for-atom basis, stratospheric bromine is more efficient at destroying ozone than is chlorine because the HBr reservoir species is more photochemically active than HCl; however, there is much less of hydrogen bromide in the stratosphere. Recent data suggest that since 1998 atmospheric concentrations have dropped 13% due the CH3Br use limitations mandated by the Montreal Protocol
identifier	9b6ca807-7719-48aa-864d-ebb45a519ff8
label	METHYL BROMIDE
parent_identifier	d46a5046-e1c6-4a09-a2f1-db6a21eda611
GCMD Metadata	9b6ca807-7719-48aa-864d-ebb45a519ff8
Ancestors	METHYL BROMIDE < HALOCARBONS AND HALOGENS < ATMOSPHERIC CHEMISTRY < ATMOSPHERE < EARTH SCIENCE < Science Keywords