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Stratospheric ozone profile and total ozone trends derived from the SAGE I and SAGE II dataGlobal trends in both stratospheric column ozone and as a function of altitude are derived on the basis of SAGE I/II ozone data from the period 1979-1991. A statistical model containing quasi-biennial, seasonal, and semiannual oscillations, a linear component, and a first-order autoregressive noise process was fit to the time series of SAGE I/II monthly zonal mean data. The linear trend in column ozone above 17-km altitude, averaged between 65 deg S and 65 deg N, is -0.30 +/-0.19 percent/yr, or -3.6 percent over the time period February 1979 through April 1991. The data show that the column trend above 17 km is nearly zero in the tropics and increases towards the high latitudes with values of -0.6 percent/yr at 60 deg S and -0.35 percent/yr at 60 deg N. Both these results are in agreement with the recent TOMS results. The profile trend analyses show that the column ozone losses are occurring below 25 km, with most of the loss coming from the region between 17 and 20 km. Negative trend values on the order of -2 percent/yr are found at 17 km in midlatitudes.
Document ID
19920042464
Document Type
Reprint (Version printed in journal)
Authors
Mccormick, M. P. (NASA Langley Research Center Hampton, VA, United States)
Veiga, Robert E. (Hughes STX Corp. Hampton, VA, United States)
Chu, William P. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 15, 2013
Publication Date
February 7, 1992
Publication Information
Publication: Geophysical Research Letters
Volume: 19
ISSN: 0094-8276
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAS1-18460
Distribution Limits
Public
Copyright
Other