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On the ambiguous nature of the 11 year solar cycle signal in upper stratospheric ozone
Author(s) -
Dhomse S. S.,
Chipperfield M. P.,
Damadeo R. P.,
Zawodny J. M.,
Ball W. T.,
Feng W.,
Hossaini R.,
Mann G. W.,
Haigh J. D.
Publication year - 2016
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 - 10.1002/2016gl069958
Subject(s) - stratosphere , occultation , ozone layer , atmospheric sciences , ozone , environmental science , solar cycle , flux (metallurgy) , microwave limb sounder , meteorology , physics , chemistry , astronomy , organic chemistry , quantum mechanics , magnetic field , solar wind
Up to now our understanding of the 11 year ozone solar cycle signal (SCS) in the upper stratosphere has been largely based on the Stratospheric Aerosol and Gas Experiment (SAGE) II (v6.2) data record, which indicated a large positive signal which could not be reproduced by models, calling into question our understanding of the chemistry of the upper stratosphere. Here we present an analysis of new v7.0 SAGE II data which shows a smaller upper stratosphere ozone SCS, due to a more realistic ozone‐temperature anticorrelation. New simulations from a state‐of‐art 3‐D chemical transport model show a small SCS in the upper stratosphere, which is in agreement with SAGE v7.0 data and the shorter Halogen Occultation Experiment and Microwave Limb Sounder records. However, despite these improvements in the SAGE II data, there are still large uncertainties in current observational and meteorological reanalysis data sets, so accurate quantification of the influence of solar flux variability on the climate system remains an open scientific question.