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dc.contributor.author
Ball, William T.
dc.contributor.author
Alsing, Justin
dc.contributor.author
Mortlock, Daniel J.
dc.contributor.author
Staehelin, Johannes
dc.contributor.author
Haigh, Joanna D.
dc.contributor.author
Thomas, Peter
dc.contributor.author
Tummon, Fiona
dc.contributor.author
Stübi, Rene
dc.contributor.author
Stenke, Andrea
dc.contributor.author
Anderson, John
dc.contributor.author
Bourassa, Adam
dc.contributor.author
Davis, Sean M.
dc.contributor.author
Degenstein, Doug
dc.contributor.author
Frith, Stacey
dc.contributor.author
Froidevaux, Lucien
dc.contributor.author
Roth, Chris
dc.contributor.author
Sofieva, Viktoria
dc.contributor.author
Wang, Ray
dc.contributor.author
Wild, Jeannette
dc.contributor.author
Yu, Pengfei
dc.contributor.author
Ziemke, Jerald R.
dc.contributor.author
Rozanov, Eugene V.
dc.date.accessioned
2018-01-10T12:05:07Z
dc.date.available
2017-12-15T11:24:46Z
dc.date.available
2018-01-10T12:05:07Z
dc.date.issued
2017-10-10
dc.identifier.issn
1680-7375
dc.identifier.issn
1680-7367
dc.identifier.other
10.5194/acp-2017-862
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/221530
dc.identifier.doi
10.3929/ethz-b-000221530
dc.description.abstract
Ozone forms in the Earth's atmosphere from the photodissociation of molecular oxygen, primarily in the tropical stratosphere. It is then transported to the extratropics by the Brewer-Dobson circulation (BDC), forming a protective "ozone layer" around the globe. Human emissions of halogen-containing ozone-depleting substances (hODSs) led to a decline in stratospheric ozone until they were banned by the Montreal Protocol (MP), and since 1998 ozone in the upper stratosphere shows a likely recovery. Total column ozone (TCO) measurements of ozone between the Earth's surface and the top of the atmosphere, indicate that the ozone layer has stopped declining across the globe, but no clear increase has been observed at latitudes outside the polar regions (60–90). Here we report evidence from multiple satellite measurements that ozone in the lower stratosphere between 60° S and 60° N has declined continuously since 1985. We find that, even though upper stratospheric ozone is recovering in response to the MP, the lower stratospheric changes more than compensate for this, resulting in the conclusion that, globally (60°&tinsp;S–60° N), stratospheric column ozone (StCO) continues to deplete. We find that globally, TCO appears to not have decreased because tropospheric column ozone (TrCO) increases, likely the result of human activity and harmful to respiratory health, are compensating for the stratospheric decreases. The reason for the continued reduction of lower stratospheric ozone is not clear, models do not reproduce these trends, and so the causes now urgently need to be established. Reductions in lower stratospheric ozone trends may partly lead to a small reduction in the warming of the climate, but a reduced ozone layer may also permit an increase in harmful ultra-violet (UV) radiation at the surface and would impact human and ecosystem health.
en_US
dc.language.iso
en
en_US
dc.publisher
European Geophysical Society
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Continuous decline in lower stratospheric ozone offsets ozone layer recovery
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Atmospheric Chemistry and Physics
ethz.journal.abbreviated
Atmos. chem. phys.
ethz.size
36 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02717 - Institut für Atmosphäre und Klima / Inst. Atmospheric and Climate Science::03517 - Peter, Thomas / Peter, Thomas
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02717 - Institut für Atmosphäre und Klima / Inst. Atmospheric and Climate Science::03517 - Peter, Thomas / Peter, Thomas
en_US
ethz.date.deposited
2017-12-15T11:24:46Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2018-01-10T12:05:11Z
ethz.rosetta.lastUpdated
2018-11-06T06:29:02Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Continuous%20decline%20in%20lower%20stratospheric%20ozone%20offsets%20ozone%20layer%20recovery&rft.jtitle=Atmospheric%20Chemistry%20and%20Physics&rft.date=2017-10-10&rft.issn=1680-7375&1680-7367&rft.au=Ball,%20William%20T.&Alsing,%20Justin&Mortlock,%20Daniel%20J.&Staehelin,%20Johannes&Haigh,%20Joanna%20D.&rft.genre=article&
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