Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 43, Issue 13, Pages 7241-7249Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016GL069958
Keywords
solar signal; stratosphere; modeling
Categories
Funding
- NERC SOLCLI [NE/D002753/1]
- MAPLE [NE/J008621/1]
- Natural Environment Research Council [NE/J008621/1, ncas10009, nceo020005, NE/D002753/1] Funding Source: researchfish
- NERC [NE/D002753/1, NE/J008621/1, nceo020005] Funding Source: UKRI
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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.
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