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Introduction

Objectives:

·       Help satellite experiments validation by assimilation of the measurements into the MSDOL model (*);

·       Create climatological fields from assimilated fields;

·       Perform trend and correlation studies.

MSDOL is a Dynamic Chemistry Transport Model (D-CTM) forced by sequential assimilation of ozone observations and forced with wind data.

The end-product is the 3D structure of the atmosphere as a function of time.

MSDOL has been developed in the frame of the EU Environment & Climate programme

The MSDOL tool consists of:

·       an atmospheric model, coupling the dynamics, the chemistry and the transport in the stratosphere and the mesosphere;

·       a coupling with meteorological analyses (winds and temperature), driving the dynamics in the lower part of the model (up to 10 hPa);

·       a coupling with ENVISAT Òatmospheric chemistryÓ instruments (GOMOS, MIPAS and SCIAMACHY) data: sequential reading and assimilation of available measurements are performed during the run of the model;

·       a tool to simulate GOMOS/MIPAS/SCIAMACHY-like measurements.

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