Spatiotemporal variations of NOy species in the northern latitudes stratosphere measured with the balloon-borne MIPAS instrumentReport as inadecuate




Spatiotemporal variations of NOy species in the northern latitudes stratosphere measured with the balloon-borne MIPAS instrument - Download this document for free, or read online. Document in PDF available to download.

1 IMK - Institute for Meteorology and Climate Research

Abstract : This paper presents the spatiotemporal distribution of NOy species at altitudes between 14 and 31 km as measured with the MIPAS-B instrument on the morning of 21 March 2003 in northern Scandinavia. At lower altitudes, temperature variations and the distribution of ClONO2 and the tracer N2O reveal the dynamics along the cross section through the edge of the late arctic polar vortex. At higher altitudes, continuous measurement before, during, and after sunrise provides information about photochemistry illustrating the evolution of the photochemically active gases NO2 and N2O5 around sunrise. The measured temporal evolution of NO2 and N2O5 is compared to box modelling that is run along backward calculated trajectories. With regard to NO2, there is a good agreement between the model and observations in terms of quantity but the photochemistry in the model is slightly too slow. The comparison of measured and modelled N2O5, however, reveals significant differences of the absolute quantities pointing at a too slow photochemistry in the model.





Author: A. Wiegele - A. Kleinert - H. Oelhaf - R. Ruhnke - G. Wetzel - F. Friedl-Vallon - A. Lengel - G. Maucher - H. Nordmeyer - H. Fisc

Source: https://hal.archives-ouvertes.fr/



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