OSIRIS observations of a tongue of NOx in the lower stratosphere at the Antarctic vortex edge: Comparison with a high-resolution simulation from the Global Environmental Multiscale (GEM) model
Global Environmental Multiscale (GEM) model
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Selected NOx profiles of the Antarctic lower stratosphere inferred from OSIRIS NO2 observations are presented from the austral spring of 2003. These observations show a tongue of NOx at 100 hPa, with a concentration typical of the middle stratosphere. Simulations with the Global Environmental Multiscale model show that this small-scale tongue of NOx-rich air descended into the lower stratosphere. The tongue was formed as a result of a Rossby wave breaking days earlier, transporting NO x from the pole, where larger concentrations had recently appeared, to the edge of the vortex. The three-dimensional structure of the breaking wave is illustrated in detail.
CitationSioris, C.E.; Chabrillat, S.; McLinden, C.A.; Haley, C.S.; Rochon, Y.J.; Ménard, R.; Charron, M.; McElroy, C.T. (2007). OSIRIS observations of a tongue of NOx in the lower stratosphere at the Antarctic vortex edge: Comparison with a high-resolution simulation from the Global Environmental Multiscale (GEM) model. , Canadian Journal of Physics, Vol. 85, Issue 11, 1195-1207, DOI: 10.1139/P07-123.