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Chemical effects in 11-year solar cycle simulations with the Freie Universität Berlin Climate Middle Atmosphere Model with online chemistry (FUB-CMAM-CHEM)

Langematz, Ulrike and Grenfell, John Lee and Matthes, Katja and Mieth, Peter and Kunze, Markus and Steil, Benedikt and Brühl, Christoph (2005) Chemical effects in 11-year solar cycle simulations with the Freie Universität Berlin Climate Middle Atmosphere Model with online chemistry (FUB-CMAM-CHEM). Geophysical Research Letters, 32 (13). DOI: 10.1029/2005GL022686.

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Abstract

The impact of 11-year solar cycle variations on stratospheric ozone (O<sub>3</sub>) 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<sub>x</sub> source in the upper mesosphere representing relativistic electron precipitation (REP). Our results suggest that the NO<sub>x</sub> source by particles and its transport from the mesosphere to the stratosphere in the polar vortex are important for the solar signal in stratospheric O<sub>3</sub>. We find a positive dipole O<sub>3</sub> signal in the annual mean, peaking at 40-45 km at high latitudes and a negative O<sub>3</sub> signal in the tropical lower stratosphere. This is similar to observations, but enhanced due to the idealized NOx source and at a lower altitude compared to the observed minimum. Our results imply that this negative O<sub>3</sub> signal arises partly via chemical effects.

Document Type:Article
Title:Chemical effects in 11-year solar cycle simulations with the Freie Universität Berlin Climate Middle Atmosphere Model with online chemistry (FUB-CMAM-CHEM)
Authors:
AuthorsInstitution or Email of Authors
Langematz, UlrikeFreie Uni Berlin, Berlin
Grenfell, John LeeUNSPECIFIED
Matthes, KatjaNational Center for Atmospheric Research (NCAR), Boulder, Colorado, USA
Mieth, PeterUNSPECIFIED
Kunze, MarkusFreie Uni Berlin, Berlin
Steil, BenediktMax-Planck Institut, Mainz
Brühl, ChristophMax-Planck Institut, Mainz
Date:July 2005
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:32
DOI:10.1029/2005GL022686
Status:Published
Keywords:Stratospheric Ozone
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben Extrasolare Planeten (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Transport Research
Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Barbara Stracke
Deposited On:11 Dec 2005
Last Modified:27 Apr 2009 04:44

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