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| Titel |
The global SF6 source inferred from long-term high precision atmospheric measurements and its comparison with emission inventories |
| VerfasserIn |
I. Levin, T. Naegler, R. Heinz, D. Osusko, E. Cuevas, A. Engel, J. Ilmberger, R. L. Langenfelds, B. Neininger, C. v. Rohden, L. P. Steele, R. Weller, D. E. Worthy, S. A. Zimov |
| 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. 6 ; Nr. 10, no. 6 (2010-03-18), S.2655-2662 |
| Datensatznummer |
250008248
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| Publikation (Nr.) |
 copernicus.org/acp-10-2655-2010.pdf |
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| Zusammenfassung |
| Emissions of sulphur hexafluoride (SF6), one of the strongest
greenhouse gases on a per molecule basis, are targeted to be collectively
reduced under the Kyoto Protocol. Because of its long atmospheric lifetime
(estimated as 800 to 3200 years), the accumulation of SF6 in the
atmosphere is a direct measure of its global emissions. Examination of our
extended data set of globally distributed high-precision SF6
observations shows an increase in SF6 abundance from near zero in the
1970s to a global mean of 6.7 ppt by the end of 2008. In-depth evaluation of
our long-term data records shows that the global source of SF6
decreased after 1995, most likely due to SF6 emission reductions in
industrialised countries, but increased again after 1998. By subtracting
those emissions reported by Annex I countries to the United Nations
Framework Convention of Climatic Change (UNFCCC) from our
observation-inferred SF6 source leaves a surprisingly large gap of more
than 70–80% of non-reported SF6 emissions in the last decade. This
suggests a strong under-estimation of emissions in Annex I countries and
underlines the urgent need for independent atmospheric verification of
greenhouse gases emissions accounting. |
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