Final published version, 1.54 MB, PDF document
Available under license: CC BY: Creative Commons Attribution 4.0 International License
Final published version
Licence: CC BY: Creative Commons Attribution 4.0 International License
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - On the ambiguous nature of the 11year solar cycle signal in upper stratospheric ozone
AU - Dhomse, S. S.
AU - Chipperfield, M. P.
AU - Damadeo, R. P.
AU - Zawodny, J. M.
AU - Ball, W. T.
AU - Feng, W.
AU - Hossaini, R.
AU - Mann, G. W.
AU - Haigh, J. D.
PY - 2016/7/16
Y1 - 2016/7/16
N2 - 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.
AB - 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.
KW - solar signal
KW - stratosphere
KW - modeling
KW - CHEMICAL-TRANSPORT MODEL
KW - QUASI-BIENNIAL OSCILLATION
KW - MT. PINATUBO ERUPTION
KW - SPECTRAL IRRADIANCE
KW - CLIMATE MODEL
KW - SAGE II
KW - SIMULATIONS
KW - VARIABILITY
KW - CIRCULATION
KW - VERSION
U2 - 10.1002/2016GL069958
DO - 10.1002/2016GL069958
M3 - Journal article
VL - 43
SP - 7241
EP - 7249
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 13
ER -