On the ambiguous nature of the 11year solar cycle signal in upper stratospheric ozone

Dhomse, S. S. and Chipperfield, M. P. and Damadeo, R. P. and Zawodny, J. M. and Ball, W. T. and Feng, W. and Hossaini, R. and Mann, G. W. and Haigh, J. D. (2016) On the ambiguous nature of the 11year solar cycle signal in upper stratospheric ozone. Geophysical Research Letters, 43 (13). pp. 7241-7249. ISSN 0094-8276

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Abstract

Up to now our understanding of the 11year 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.

Item Type:
Journal Article
Journal or Publication Title:
Geophysical Research Letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900
Subjects:
ID Code:
82375
Deposited By:
Deposited On:
24 Oct 2016 10:26
Refereed?:
Yes
Published?:
Published
Last Modified:
07 Aug 2020 01:07