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CLAES CH 4 , N 2 O and CCL 2 F 2 (F12) Global data
Author(s) -
Kumer J. B.,
Mergenthaler J. L.,
Roche A. E.
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 - 10.1029/93gl01341
Subject(s) - stratosphere , altitude (triangle) , descent (aeronautics) , troposphere , climatology , geology , atmospheric sciences , meteorology , geography , geometry , mathematics
Zonal mean comparisons of CH 4 (for altitude regions above the 1.35 ppmv contour), of N 2 O (above the 210 ppbv contour), and of F12 (above the 360 pptv contour) with UARS Pre‐launch Climatology and with recent models shows reasonable agreement, and some interesting differences in the details of equatorial uplift and descent near the winter poles, including apparent north ‐ south differences. Prominent features such as the double peaked uplift structure in the April–May SAMS [Jones and Pyle, 1984; Barnett et al, 1985] data are clearly evident in all three CLAES tracers. Contours of SAMS CH 4 and N 2 O occur mostly at higher pressures than in the CLAES data, presumably due in part to increased tropospheric content of these gasses, and/or perhaps some dynamic difference associated with the 15 years time difference between the data sets. The CLAES F12 are the first long time base global data sets. These show more tropical uplift than climatology or models. This might suggest a somewhat shorter lifetime of F12 in the stratosphere than is currently accepted.