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NOAA-led team measures atmosphere's self-cleaning capacity
Date:1/6/2011

pleting gas dropped precipitously.

Without the confounding effect of any appreciable methyl chloroform emissions, a more precise picture of hydroxyl variability emerged based on the observed decay of remaining methyl chloroform. The scientists studied hydroxyl radicals both by making measurements of methyl chloroform from NOAA's international cooperative air sampling program and also by modeling results with state-of-the-art models.

The group's findings improve confidence in projecting the future of Earth's atmosphere.

"Say we wanted to know how much we'd need to reduce human-derived emissions of methane to cut its climate influence by half," Montzka said. "That would require an understanding of hydroxyl and its variability. Since the new results suggest that large hydroxyl radical changes are unlikely, such projections become more reliable."


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Contact: Jana Goldman
jana.goldman@noaa.gov
301-734-1123
NOAA Headquarters
Source:Eurekalert

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