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Stratospheric Cooling and Arctic Ozone RecoveryWe present sensitivity studies using the AER box model for an idealized parcel in the lower stratosphere at 70 deg N during winter/spring with different assumed stratospheric cooling and chlorine loadings. Our calculations show that stratospheric cooling could further deplete ozone via increased polar stratospheric cloud (PSC) formation and retard its expected recovery even with the projected chlorine loading decrease. We introduce the concept of chlorine-cooling equivalent and show that a 1 K cooling could provide the same local ozone depletion as an increase of chlorine by 0.4 - 0.7 ppbv for the scenarios considered. Thus, sustained stratospheric cooling could further reduce Arctic ozone content and delay the anticipated ozone recovery in the Northern Hemisphere even with the realization of the Montreal Protocol and its Amendments.
Document ID
20000011651
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Danilin, Michael Y.
(Atmospheric and Environmental Research, Inc. Cambridge, MA United States)
Sze, Nien-Dak
(Atmospheric and Environmental Research, Inc. Cambridge, MA United States)
Ko, Malcolm K. W.
(Atmospheric and Environmental Research, Inc. Cambridge, MA United States)
Rodriguez, Jose M.
(Atmospheric and Environmental Research, Inc. Cambridge, MA United States)
Tabazadeh, Azadeh
(NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 19, 2013
Publication Date
June 15, 1998
Publication Information
Publication: Geophysical Research Letters
Publisher: American Geophysical Union
Volume: 25
Issue: 12
ISSN: 0094-8534
Subject Category
Environment Pollution
Report/Patent Number
Paper-98GL01587
Funding Number(s)
CONTRACT_GRANT: NAS5-32844
CONTRACT_GRANT: NAS5-97039
Distribution Limits
Public
Copyright
Other

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