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| Titel |
Atmospheric three-dimensional inverse modeling of regional industrial emissions and global oceanic uptake of carbon tetrachloride |
| VerfasserIn |
X. Xiao, R. G. Prinn, P. J. Fraser, R. F. Weiss, P. G. Simmonds, S. O'Doherty, B. R. Miller, P. K. Salameh, C. M. Harth, P. B. Krummel, A. Golombek, L. W. Porter, J. H. Butler, J. W. Elkins, G. S. Dutton, B. D. Hall, L. P. Steele, R. H. J. Wang, D. M. Cunnold |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 21 ; Nr. 10, no. 21 (2010-11-08), S.10421-10434 |
| Datensatznummer |
250008875
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| Publikation (Nr.) |
 copernicus.org/acp-10-10421-2010.pdf |
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| Zusammenfassung |
| Carbon tetrachloride (CCl4) has substantial stratospheric ozone
depletion potential and its consumption is controlled under the Montreal
Protocol and its amendments. We implement a Kalman filter using atmospheric
CCl4 measurements and a 3-dimensional chemical transport model to
estimate the interannual regional industrial emissions and seasonal global
oceanic uptake of CCl4 for the period of 1996–2004. The Model of
Atmospheric Transport and Chemistry (MATCH), driven by offline National
Center for Environmental Prediction (NCEP) reanalysis meteorological fields,
is used to simulate CCl4 mole fractions and calculate their
sensitivities to regional sources and sinks using a finite difference
approach. High frequency observations from the Advanced Global Atmospheric
Gases Experiment (AGAGE) and the Earth System Research Laboratory (ESRL) of
the National Oceanic and Atmospheric Administration (NOAA) and low frequency
flask observations are together used to constrain the source and sink
magnitudes, estimated as factors that multiply the a priori fluxes. Although
industry data imply that the global industrial emissions were substantially
declining with large interannual variations, the optimized results show only
small interannual variations and a small decreasing trend. The global
surface CCl4 mole fractions were declining in this period because the
CCl4 oceanic and stratospheric sinks exceeded the industrial emissions.
Compared to the a priori values, the inversion results indicate substantial
increases in industrial emissions originating from the South Asian/Indian
and Southeast Asian regions, and significant decreases in emissions from the
European and North American regions. |
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