@Article{acp-5-1467-2005, AUTHOR = {Durry, G. and Hauchecorne, A.}, TITLE = {Evidence for long-lived polar vortex air in the mid-latitude summer stratosphere from in situ laser diode CH$_{4}$ and H$_{2}$O measurements}, JOURNAL = {Atmospheric Chemistry and Physics}, VOLUME = {5}, YEAR = {2005}, NUMBER = {6}, PAGES = {1467--1472}, URL = {http://www.atmos-chem-phys.net/5/1467/2005/}, ISSN = {1680-7316} }