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| Titel |
Long range transport and fate of a stratospheric volcanic cloud from Soufrière Hills volcano, Montserrat |
| VerfasserIn |
A. J. Prata, S. A. Carn, A. Stohl, J. Kerkmann |
| 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 ; 7, no. 19 ; Nr. 7, no. 19 (2007-10-04), S.5093-5103 |
| Datensatznummer |
250005213
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| Publikation (Nr.) |
 copernicus.org/acp-7-5093-2007.pdf |
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| Zusammenfassung |
| Volcanic eruptions emit gases, ash particles and hydrometeors into the
atmosphere, occasionally reaching heights of 20 km or more, to reside in the
stratospheric overworld where they affect the radiative balance of the
atmosphere and the Earth's climate. Here we use satellite measurements and a
Lagrangian particle dispersion model to determine the mass loadings,
vertical penetration, horizontal extent, dispersion and transport of
volcanic gases and particles in the stratosphere from the volcanic cloud
emitted during the 20 May 2006 eruption of Soufrière Hills volcano,
Montserrat, West Indies. Infrared, ultraviolet and microwave radiation
measurements from two polar orbiters are used to quantify the gases and
particles, and track the movement of the cloud for 23 days, over a distance
of ~18 000 km. Approximately, 0.1±0.01 Tg(S) was injected into
the stratosphere in the form of SO2: the largest single sulphur input
to the stratosphere in 2006. Microwave Limb Sounder measurements indicate an
enhanced mass of HCl of ~0.003–0.01 Tg. Geosynchronous satellite data
reveal the rapid nature of the stratospheric injection and indicate that the
eruption cloud contained ~2 Tg of ice, with very little ash reaching
the stratosphere. These new satellite measurements of volcanic gases and
particles can be used to test the sensitivity of climate to volcanic forcing
and assess the impact of stratospheric sulphates on climate cooling. |
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