Global increase of SF6 observed in the atmosphere
High precision long-term observations of the trace gas sulphur hexafluoride (SF6) in background air at Neumayer station, Antarctica (1986-1991), and at Izana observatory, Tenerife (1991-1992), are presented. Since the very first measurements in 1970 (0.03pptv), the purely anthropogenic greenhouse ga...
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| Weitere Verfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
Heidelberg
Universitätsbibliothek der Universität Heidelberg
1994
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| DOI: | 10.11588/heidok.00006867 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://nbn-resolving.de/urn:nbn:de:bsz:16-opus-68673 Verlag, kostenfrei, Volltext: https://doi.org/10.11588/heidok.00006867 Verlag, kostenfrei, Volltext: https://archiv.ub.uni-heidelberg.de/volltextserver/6867/ 
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| Verfasserangaben: | Manfred Maiss; Ingeborg Levin |
MARC
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| 520 | |a High precision long-term observations of the trace gas sulphur hexafluoride (SF6) in background air at Neumayer station, Antarctica (1986-1991), and at Izana observatory, Tenerife (1991-1992), are presented. Since the very first measurements in 1970 (0.03pptv), the purely anthropogenic greenhouse gas SF6 has increased by two orders of magnitude to a global mean value of 2.8pptv in 1992. The observations can best be fitted by a quadratic curve with a recent increase rate of 8.3%/yr. A significant north-south gradient of 0.29pptv is observed. From this gradient an interhemispheric exchange time of 1.4 years is derived. A modeled atmospheric budget history agrees reasonably well with estimates of global SF6 production rates and leads to an extrapolated SF6 concentration of about 20pptv for the year 2030. | ||
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