Evidence for long-lived polar vortex air in the mid-latitude summer stratosphere from in situ laser diode CH4 and H2O measurements G. Durry1,2 and A. Hauchecorne1 1IPSL, Service d’Aéronomie, UMR 7620, BP 3, 91371 Verrières-le-Buisson Cédex, France 2GSMA, UMR 6089, Université de Reims, BP 1039, 51687 Reims, Cédex 2, Franceo
Abstract. A balloon borne diode laser spectrometer was launched in southern France in
June 2000 to yield in situ stratospheric CH4 and H2O measurements.
In the altitude region ranging from 20km to 25km, striking large spatial
structures were observed in the vertical concentration profiles of both
species. We suggest these patterns are due to the presence of long-lived
remnants of the wintertime polar vortex in the mid-latitude summer
stratosphere. To support this interpretation, a high resolution advection
model for potential vorticity is used to investigate the evolution of the
Arctic vortex after its breakdown phase in spring 2000.
Citation: Durry, G. and Hauchecorne, A.: Evidence for long-lived polar vortex air in the mid-latitude summer stratosphere from in situ laser diode CH4 and H2O measurements, Atmos. Chem. Phys., 5, 1467-1472, doi:10.5194/acp-5-1467-2005, 2005.