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Validating global atmospheric models using Odin satellite data

Samuel Brohede(1), Joachim Urban(1), Stefan Lossow(1), Donal Murtagh(1) and Patrick Eriksson(1)

(1) Chalmers University of Technology, , 412 96 Göteborg, Sweden

Abstract

The Odin satellite, launched in February 2001, provides global or near-global coverage of various atmospheric constituents with high vertical resolution. The two onboard instruments, the Sub-Millimetre Radiometer (SMR) and the Optical Spectrograph and Infra-Red Imager System (OSIRIS), are co-aligned and give reliable profiles of O3, NO2, N2O, HNO3, H2O, CO, etc. A new approach, where data from both OSIRIS and SMR are merged using a chemical box model to construct an Odin proxy NOy product, has recently been developed.

Climatologies of these data sets, based on multi-year statistics, have proven to be very useful for validating Chemical Transport Models (CTMs) and Chemistry Climate Models (CCMs). Longer-lived species such as N2O and CO have been used to test whether atmospheric transport is realistically represented by/in the models. The presentation will describe the relevant Odin climatologies and provide examples of comparisons to state-of-the-art chemistry climate models such as the Canadian Middle Atmosphere Model.