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| Titel |
Sulfur hexafluoride (SF6) emissions in East Asia determined by inverse modeling |
| VerfasserIn |
X. Fang, R. L. Thompson, T. Saito, Y. Yokouchi, J. Kim, S. Li, K. R. Kim, S. Park, F. Graziosi, A. Stohl |
| 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 ; 14, no. 9 ; Nr. 14, no. 9 (2014-05-14), S.4779-4791 |
| Datensatznummer |
250118700
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| Publikation (Nr.) |
 copernicus.org/acp-14-4779-2014.pdf |
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| Zusammenfassung |
| Sulfur hexafluoride (SF6) has a global warming
potential of around 22 800 over a 100-year time horizon and is one of the
greenhouse gases regulated under the Kyoto Protocol. Around the year 2000
there was a reversal in the global SF6 emission trend, from a
decreasing to an increasing trend, which was likely caused by increasing
emissions in countries that are not obligated to report their annual
emissions to the United Nations Framework Convention on Climate Change. In
this study, SF6 emissions during the period 2006–2012 for all East
Asian countries – including Mongolia, China, Taiwan, North Korea, South Korea
and Japan – were determined by using inverse modeling and in situ atmospheric
measurements. We found that the most important sources of uncertainty
associated with these inversions are related to the choice of a priori
emissions and their assumed uncertainty, the station network as well as the
meteorological input data. Much lower uncertainties are due to seasonal
variability in the emissions, inversion geometry and resolution, and the
measurement calibration scale. Based on the results of these sensitivity
tests, we estimate that the total SF6 emission in East Asia increased
rapidly from 2404 ± 325 Mg yr−1 in 2006 to 3787 ± 512 Mg yr−1 in
2009 and stabilized thereafter. China contributed 60–72% to the total
East Asian emission for the different years, followed by South Korea
(8–16%), Japan (5–16%) and Taiwan (4–7%), while the
contributions from North Korea and Mongolia together were less than 3% of
the total. The per capita SF6 emissions are highest in South Korea
and Taiwan, while the per capita emissions for China, North Korea and Japan
are close to global average. During the period 2006–2012, emissions from
China and from South Korea increased, while emissions from Taiwan and Japan
decreased overall. |
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