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The influence of large amplitude planetary waves on the Antarctic ozone hole of austral spring 2017
Citation
Evtushevsky, O and Klekociuk, AR and Kravchenko, V and Milinevsky, G and Grytsai, A, The influence of large amplitude planetary waves on the Antarctic ozone hole of austral spring 2017, Journal of Southern Hemisphere Earth Systems Science pp. 1-12. ISSN 2206-5865 (In Press) [Refereed Article]
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Copyright Statement
Copyright 2019 The Authors
Official URL: http://www.bom.gov.au/jshess/index.shtml
Abstract
Quasi-stationary planetary wave activity in the lower
Antarctic stratosphere in the late austral winter was an
important contributor to the preconditioning of the ozone
hole in spring 2017. Observations show that the ozone
hole area in spring 2017 was at the level of 1980s, i.e.
almost half the maximum size in 2000s. The observed
ozone hole area was close to that forecasted based on a
least-squares linear regression between wave amplitude in
August and ozone hole area in September–November. We
show that the key factor which contributed to the
preconditioning of the Antarctic stratosphere for a
relatively small ozone hole in the spring of 2017 was the
development of large-amplitude stratospheric planetary
waves of zonal wavenumbers 1 and 2 in late winter. The
waves likely originated from tropospheric wave trains, and
promoted the development of strong mid-latitude
anticyclones in the lower stratosphere which interacted
with the stratospheric polar vortex and strongly eroded the
vortex in August and September, mitigating the overall
level of ozone loss.
Item Details
Item Type: | Refereed Article |
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Keywords: | ozone, stratosphere, Rossby wave, dynamics |
Research Division: | Earth Sciences |
Research Group: | Atmospheric Sciences |
Research Field: | Atmospheric Dynamics |
Objective Division: | Environment |
Objective Group: | Atmosphere and Weather |
Objective Field: | Atmospheric Processes and Dynamics |
UTAS Author: | Klekociuk, AR (Dr Andrew Klekociuk) |
ID Code: | 134276 |
Year Published: | In Press |
Deposited By: | CRC-Antarctic Climate & Ecosystems |
Deposited On: | 2019-08-06 |
Last Modified: | 2019-09-16 |
Downloads: | 6 View Download Statistics |
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