Premium
Heavy ozone enrichments from ATMOS infrared solar spectra
Author(s) -
Irion F. W.,
Gunson M. R.,
Rinsland C. P.,
Yung Y. L.,
Abrams M. C.,
Chang A. Y.,
Goldman A.
Publication year - 1996
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 - 10.1029/96gl01695
Subject(s) - mixing ratio , standard deviation , occultation , atmospheric sciences , analytical chemistry (journal) , spectral line , latitude , infrared , spectral resolution , environmental science , physics , chemistry , astrophysics , optics , astronomy , mathematics , environmental chemistry , statistics
Vertical enrichment profiles of stratospheric 16 O 16 O l8 O and 16 O 18 O 16 O (hereafter referred to as 668 O 3 and 686 O 3 respectively) have been derived from space‐based solar occultation spectra recorded at 0.01 cm −1 resolution by the ATMOS ( A tmospheric T race MO lecule S pectroscopy) Fourier‐transform infrared (FTIR) spectrometer. The observations, made during the Spacelab 3 and ATLAS‐1, ‐2, and ‐3 shuttle missions, cover polar, mid‐latitude and tropical regions between 26 to 2.6 mb inclusive (≈ 25 to 41 km). Average enrichments, weighted by molecular 48 O 3 density, of (15±6)% were found for 668 O 3 and (10±7)% for 686 O 3 . Defining the mixing ratio of 50 O 3 as the sum of those for 668 O 3 and 686 O 3 , an enrichment of (13±5)% was found for 50 O 3 (1σ standard deviation). No latitudinal or vertical gradients were found outside this standard deviation. From a series of ground‐based measurements by the ATMOS instrument at Table Mountain, California (34.4°N), an average total column 668 O 3 enrichment of (17±4)% (1σ standard deviation) was determined, with no significant seasonal variation discernable. Possible biases in the spectral intensities that affect the determination of absolute enrichments are discussed.