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HALOE observations of the Arctic Vortex during the 1997 spring: Horizontal structure in the lower stratosphere
Author(s) -
Pierce R. Bradley,
Fairlie T. Duncan,
Remsberg Ellis E.,
Russell James M.,
Grose William L.
Publication year - 1997
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 - 10.1029/97gl52833
Subject(s) - stratosphere , polar vortex , arctic , atmospheric sciences , vortex , ozone , the arctic , ozone depletion , environmental science , mixing (physics) , climatology , chlorine , geology , chemistry , physics , oceanography , meteorology , organic chemistry , quantum mechanics
In late March, 1997, HALOE observed very low ozone (less than 1 ppmv at 48OK), low HCl, generally high NO x , and normal levels of H 2 O within the Arctic vortex. Trajectory mapping techniques show that the lower stratospheric Arctic vortex was locally chemically perturbed during this period. Regions of low HCl and low NO x mixing ratios found within the Arctic vortex indicate that partitioning within the odd chlorine family had been shifted from reservoir species to active species. Low O 3 mixing ratios within these regions strongly suggest that chlorine‐catalyzed photochemical destruction of O 3 had recently taken place. Regions of low HCl and higher NO x mixing ratios are also observed within the Arctic vortex. Correlations of O 3 , H 2 O, NO x and HCl with HF are used to quantify the changes in these constituents during March and early April, 1997. Temporal changes in the correlation of HCl and NO x with HF indicate increases in these species. No trend in the correlations of H 2 O or O 3 with HF was found in the lower stratosphere.