Theoretical validation of ground-based microwave ozone observations
Item
Title (Dublin Core)
Theoretical validation of ground-based microwave ozone observations
Description (Dublin Core)
Ground-based microwave measurements of the diurnal and seasonal variations of ozoneat 42±4.5 and 55±8 km are validated by comparing with results from a zero-dimensional photochemical model and a two-dimensional (2D) chemical/radiative/dynamical model, respectively. O<sub>3</sub> diurnal amplitudes measured in Bordeaux are shown to be in agreement with theory to within 5%. For the seasonal analysis of O<sub>3</sub> variation, at 42±4.5 km, the 2D model underestimates the yearly averaged ozone concentration compared with the measurements. A double maximum oscillation (~3.5%) is measured in Bordeaux with an extended maximum in September and a maximum in February, whilst the 2D model predicts only a single large maximum (17%) in August and a pronounced minimum in January. Evidence suggests that dynamical transport causes the winter O<sub>3</sub> maximum by propagation of planetary waves, phenomena which are not explicitly reproduced by the 2D model. At 55±8 km, the modeled yearly averaged O<sub>3</sub> concentration is in very good agreement with the measured yearly average. A strong annual oscillation is both measured and modeled with differences in the amplitude shown to be exclusively linked to temperature fields.
Creator (Dublin Core)
Ricaud, P.
Brasseur, G.
Brillet, J.
Noë, J.
Parisot, J.-P.
Pirre, M.
Date (Dublin Core)
2018-09-27
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.1007/s00585-994-0664-5
https://angeo.copernicus.org/articles/12/664/1994/
Source (Dublin Core)
eISSN: 1432-0576
Language (Dublin Core)
eng
