Temporal variance of lower mesospheric ozone over Switzerland during winter 2000/2001

Physics

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Atmospheric Composition And Structure: Middle Atmosphere: Constituent Transport And Chemistry (3334), Atmospheric Composition And Structure: Middle Atmosphere: Energy Deposition (3334), Atmospheric Composition And Structure: Pressure, Density, And Temperature, Atmospheric Composition And Structure: Instruments And Techniques

Scientific paper

The Stratospheric Ozone Monitoring Radiometer (SOMORA) is continuously operated in Switzerland and measures ozone volume mixing ratio qO3 in the stratosphere and lower mesosphere with a time resolution of about 30 min. Temporal variances S (wave period band 1-3 h) of daytime and nighttime ozone are studied at an altitude of 55 km from October 1, 2000 to May 1, 2001. Gravity waves are assumed as cause of the observed short-time fluctuations of qO3. Strong negative and positive correlations are found between the dynamic state of the stratosphere (represented by time series of ERA-40 reanalyses) and SOMORA's S and qO3 series of lower mesospheric ozone. Oscillations with periods of 5-30 days are present in the S and qO3 series.

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