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T. Reddmann, R. Ruhnke, W. Kouker and S. Versick

Evaluating transport in the middle atmosphere using ERA-Interim analyses

Results of model simulations of long-term tracer transport in the middle atmosphere using ERA-Interim analyses are presented using the 3D model KASIMA. KASIMA combines meterological analyses with a mechanistic model covering a vertical range from the lower stratosphere up to the lower thermosphere. Several artificial tracers have been implemented in the model simulating trace gases as SF6, CO2, N2O and H2O, commonly used to derive transport properties in the middle atmosphere from observations. Using the whole period of ERA-Interim from 1979 up to present, we compare observations of these tracers with the model results to characterise the transport properties of the simulations.

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