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Components of interannual ozone change based on Nimbus 7 TOMS dataA multiple regression statistical model is applied to estimate the latitude and seasonal dependences of the solar cycle, quasi-biennial oscillation (QBO), and anthropogenic trend components of stratospheric total ozone change using 13.2 years of Nimbus 7 TOMS data. The characteristics of the linear trend component are in agreement with earlier studies. The QBO regression coefficient is significantly different from zero at high southern latitudes in the Austral spring supporting earlier evidence that the Antarctic ozone depletion is modulated by the QBO. The existence of a solar cycle component is indicated by empirical studies of model residuals and by the approximate agreement of the derived global mean solar coefficient amplitude with photochemical calculations. Initial estimates for the latitude dependence of the solar coefficient suggest higher amplitudes with increasing latitude, especially in the Southern Hemisphere in spring. The statistical model predicts a return to more rapid ozone depletions during the next 4 years as solar minimum is approached.
Document ID
19930034866
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hood, Lon L.
(NASA Headquarters Washington, DC United States)
Mccormack, John P.
(Arizona Univ. Tucson, United States)
Date Acquired
August 15, 2013
Publication Date
December 2, 1992
Publication Information
Publication: Geophysical Research Letters
Volume: 19
Issue: 23
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
93A18863
Funding Number(s)
CONTRACT_GRANT: NSF ATM-90-12012
CONTRACT_GRANT: NAGW-909
Distribution Limits
Public
Copyright
Other

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