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| Titel |
The potential of stratospheric ozone changes to influence the abundance of sulfate aerosols in the troposphere |
| VerfasserIn |
Apostolos Voulgarakis, Drew Shindell  |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250054076
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| Zusammenfassung |
| Stratospheric ozone abundances are expected to change in the future due to regulations in
the use of ozone-destroying CFCs and due to greenhouse gas increases, that can
impact chemical processes in the stratosphere. Any change in stratospheric ozone has
the potential to alter tropospheric chemistry, through modifications of shortwave
radiation entering the troposphere. In particular, modifications of radiation can
affect photolysis of ozone in the troposphere, and thus impact the production of
hydroxyl radicals (OH). The latter are very important for the production of sulfate
aerosols (SO4) from sulfur dioxide (SO2) emissions. In this work, we perform a set of
sensitivity runs with the G-PUCCINI chemistry-climate model (GISS GCM with aerosol
and gas chemistry) to investigate how the expected future changes in stratospheric
ozone concentrations can alter the abundance of sulfate aerosols in the troposphere
through modifications of photolysis. Additionally, we examine the possible effects of
stratospheric ozone changes on methane lifetime and ozone formation in the troposphere. |
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