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An investigation into the causes of stratospheric ozone loss in the southern Australasian regionMeasurements of total ozone at Macquarie Island (55 deg S, 159 deg E) reveal statistically significant reductions of approximately twelve percent during July to September when comparing the mean levels for 1987-90 with those in the seventies. In order to investigate the possibility that these ozone changes may not be a result of dynamic variability of the stratosphere, a simple linear model of ozone was created from statistical analysis of tropopause height and isentropic transient eddy heat flux, which were assumed representative of the dominant dynamic influences. Comparison of measured and modeled ozone indicates that the recent downward trend in ozone at Macquarie Island is not related to stratospheric dynamic variability and therefore suggests another mechanism, possibly changes in photochemical destruction of ozone.
Document ID
19920068538
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lehmann, P.
(Bureau of Meteorology Melbourne, Australia)
Karoly, D. J.
(Monash University Clayton, Australia)
Newmann, P. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Clarkson, T. S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Matthews, W. A.
(National Institute of Water and Atmospheric Research, Ltd. Wellington, New Zealand)
Date Acquired
August 15, 2013
Publication Date
July 24, 1992
Publication Information
Publication: Geophysical Research Letters
Volume: 19
Issue: 14, J
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
92A51162
Distribution Limits
Public
Copyright
Other

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