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Eastern Asian Emissions of Anthropogenic Halocarbons Deduced from Aircraft Concentration DataThe Montreal Protocol restricts production of ozone-depleting halocarbons worldwide. Enforcement of the protocol has relied mainly on annual government statistics of production and consumption of these compounds (bottom-up approach). We show here that aircraft observations of ha1ocarbon:CO enhancement ratios on regional to continental scales can be used to infer halocarbon emissions, providing independent verification of the bottom-up approach. We apply this topdown approach to aircraft observations of Asian outflow &om the TRACE-P mission over the western Pacific (March-April 2001) and derive emissions from eastern Asia (China, Japan, and Korea). We derive an eastern Asian carbon tetrachloride (CCl4) source of 21.5 Gg yr(sup -1), several-fold larger than previous estimates and amounting to -30% of the global budget for this gas. Our emission estimate for CFC-11 from eastern Asia is 50% higher than inventories derived from manufacturing records. Our emission estimates for methyl chloroform (CH3CC13) and CFC-12 are in agreement with existing inventories. For halon 1211 we find only a strong local source originating from the Shanghai area. Our emission estimates for the above gases result in a approximately equal to 40% increase in the ozone depletion potential (ODP) of Asian emissions relative to previous estimates, corresponding to a approximately equal to 10% global increase in ODP.
Document ID
20040110805
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Palmer, Paul I.
(Harvard Univ. Cambridge, MA, United States)
Jacob, Daniel J.
(Harvard Univ. Cambridge, MA, United States)
Mickle, Loretta, J.
(Harvard Univ. Cambridge, MA, United States)
Blake, Donald R.
(California Univ. Irvine, CA, United States)
Sachse, Glen W.
(NASA Langley Research Center Hampton, VA, United States)
Fuelberg, Henry E.
(Florida State Univ. Tallahassee, FL, United States)
Kiley, Christopher M.
(Florida State Univ. Tallahassee, FL, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Publication Information
Publication: Journal of Geophysical Research
Publisher: American Geophysical Union
Volume: 108
Issue: D24
ISSN: 0148-0227
Subject Category
Geophysics
Funding Number(s)
CONTRACT_GRANT: NAG1-2328
Distribution Limits
Public
Copyright
Other

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