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First direct simultaneous HCl and ClONO 2 profile measurements in the Arctic Vortex
Author(s) -
Payan S.,
CamyPeyret C.,
Jeseck P.,
Hawat T.,
Durry G.,
Lefèvre F.
Publication year - 1998
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/98gl01933
Subject(s) - stratosphere , occultation , mixing ratio , atmospheric sciences , arctic , atmospheric sounding , spectral line , altitude (triangle) , atmospheric chemistry , environmental science , polar vortex , chlorine , analytical chemistry (journal) , physics , chemistry , meteorology , geology , ozone , astrophysics , environmental chemistry , astronomy , oceanography , geometry , mathematics , organic chemistry
Coincident vertical profiles of HCl and ClONO 2 in the Arctic vortex have been retrieved simultaneously in the altitude range 13 to 31km. Solar occultation spectra were recorded, during both ascent and occultation, with a balloon‐borne infrared Fourier transform spectrometer launched on 22 March 1995 from Kiruna (Sweden, 67°N, 22°E). A depleted layer of HCl is observed between 16 and 18 km, whereas ClONO 2 is showing values larger than 2 ppbv around 20 km. The impact on the derived total inorganic chlorine of a 20% increase of the current ClONO 2 absolute line intensities is discussed. These first direct measurements of the mixing ratio profiles of HCl and ClONO 2 are compared with the results of the REPROBUS chemistry transport model and discussed in term of chlorine partitioning.