Chemical effects in 11-year solar cycle simulations with the Freie Universität Berlin Climate Middle Atmosphere Model with online chemistry (FUB-CMAM-CHEM)
| Autor: | J. Lee Grenfell, Katja Matthes, Peter Mieth, Markus Kunze, Benedikt Steil, Ulrike Langematz, Christoph Brühl |
|---|---|
| Přispěvatelé: | 0 Pre-GFZ, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum |
| Rok vydání: | 2005 |
| Předmět: |
010504 meteorology & atmospheric sciences
Stratospheric Ozone Electron precipitation 550 - Earth sciences Atmospheric model Atmospheric sciences 01 natural sciences 7. Clean energy climate simulation Solar cycle Mesosphere Geophysics 13. Climate action Polar vortex Climatology 0103 physical sciences Ozone layer solar cycle General Earth and Planetary Sciences Precipitation 010303 astronomy & astrophysics Stratosphere 0105 earth and related environmental sciences |
| Zdroj: | Geophysical Research Letters Geophysical Research Letters, 32 (13). L13803. |
| Popis: | The impact of 11-year solar cycle variations on stratospheric ozone (O3) is studied with the Freie Universität Berlin Climate Middle Atmosphere Model with interactive chemistry (FUB-CMAM-CHEM). To consider the effect of variations in charged particle precipitation we included an idealized NO x source in the upper mesosphere representing relativistic electron precipitation (REP). Our results suggest that the NO x source by particles and its transport from the mesosphere to the stratosphere in the polar vortex are important for the solar signal in stratospheric O3. We find a positive dipole O3 signal in the annual mean, peaking at 40–45 km at high latitudes and a negative O3 signal in the tropical lower stratosphere. This is similar to observations, but enhanced due to the idealized NO x source and at a lower altitude compared to the observed minimum. Our results imply that this negative O3 signal arises partly via chemical effects. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|