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A two-dimensional model study of the QBO signal in SAGE II NO2 and O3Calculations of the quasi biennial oscillation (QBO) signal in Stratospheric Aerosol and Gas Experiment (SAGE) II O3 and NO2 data between 1984 and 1991 are presented and have been investigated by using a two-dimensional model. The isentropic 2D model is a fully interactive radiative-dynamical-chemical model in which the eddy fluxes of chemical species are calculated in a consistent manner. The QBO in the model has been forced by relaxing the equatorial zonal wind toward the observations at Singapore allowing the comparison of the model with observations from specific years. The model reproduces the observed vertical structure of the equatorial ozone anomaly with the well-known transition from dynamical to photochemical control at around 28km. The model also reproduces the observed vertical structure of the SAGE II observed NO2 anomaly. The model studies have shown that it is the QBO modulation of NO2 which the main cause of QBO signal in O3 above 30 km. The model also reproduces the observed latitudinal structure of the QBO signals in O3 and NO2. Due to the differing horizontal distribution of O3 and NO(y) the ozone signal shows a distinct phase change in the subtropics whereas the NO2 anomaly gives a broader signal.
Document ID
19950035452
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Chipperfield, M. P.
(Univ. of Cambridge Cambridge, United Kingdom)
Gray, L. J.
(Rutherford Appleton Lab. Chilton, Oxon, United Kingdom)
Kinnersley, J. S.
(Univ. of Edinburgh United Kingdom)
Zawodny, J.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 16, 2013
Publication Date
April 1, 1994
Publication Information
Publication: Geophysical Research Letters
Volume: 21
Issue: 7
ISSN: 0094-8276
Subject Category
Meteorology And Climatology
Accession Number
95A67051
Distribution Limits
Public
Copyright
Other

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