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Wintertime measurements of stratospheric HNO 3 as part of the ISY Polar Ozone Project
Author(s) -
Fast H.,
McElroy C. T.,
Wardle D. I.,
Rosen James M.
Publication year - 1993
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 - 10.1029/93gl02841
Subject(s) - stratosphere , altitude (triangle) , radiometer , environmental science , atmospheric sciences , ozone , ozone layer , polar vortex , arctic , polar , ozone depletion , atmospheric sounding , the arctic , meteorology , remote sensing , physics , geology , oceanography , mathematics , geometry , astronomy
Atmospheric infrared emission has been recorded with a scanning variable‐filter radiometer on eight stratospheric balloon flights at Alert, inside the arctic vortex, from December 1991 to March 1992. The radiometer and the data analysis for the determination of the altitude distribution of nitric acid vapour are described. The time development of the nitric acid altitude profile at Alert is presented. A sudden change in the profile and vertical column density appears to be associated with the mid‐January stratospheric warming. There is good overall agreement between our results and other arctic winter measurements.