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| Titel |
The radiative impact of major volcanic eruptions on stratospheric water vapour |
| VerfasserIn |
Michael Löffler, Sabine Brinkop, Patrick Jöckel |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250124801
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| Publikation (Nr.) |
 EGU/EGU2016-4290.pdf |
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| Zusammenfassung |
| Volcanic eruptions can have significant impact on the earth’s weather and climate system.
Besides the subsequent tropospheric changes also the stratosphere is influenced by large
eruptions. Here changes in stratospheric water vapour after the two major volcanic eruptions
of El Chichón in Mexico in 1982 and Mount Pinatubo on the Philippines in 1991 are
investigated with chemistry-climate model simulations. This study is based on two
simulations with specified dynamics of the EMAC model, performed within the Earth System
Chemistry integrated Modelling (ESCiMo) project, of which only one includes the volcanic
forcing through prescribed aerosol optical properties. The results show a significant increase
in stratospheric water vapour after the eruptions, resulting from increased heating rates
and the subsequent changes in stratospheric and tropopause temperatures in the
tropics. The tropical vertical advection and the South Asian summer monsoon are
identified as important sources for the additional water vapour in the stratosphere.
Additionally, volcanic influences on the tropospheric water vapour and ENSO are evident. |
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