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dc.contributor.author
Järvinen, Emma
dc.contributor.author
Jourdan, Olivier
dc.contributor.author
Neubauer, David
dc.contributor.author
Yao, Bin
dc.contributor.author
Liu, Chao
dc.contributor.author
Andreae, Meinrat O.
dc.contributor.author
Lohmann, Ulrike
dc.contributor.author
Wendisch, Manfred
dc.contributor.author
McFarquhar, Greg M.
dc.contributor.author
Leisner, Thomas
dc.contributor.author
Schnaiter, Martin
dc.date.accessioned
2018-11-28T16:20:10Z
dc.date.available
2018-11-16T05:41:49Z
dc.date.available
2018-11-28T16:20:10Z
dc.date.issued
2018
dc.identifier.issn
1680-7375
dc.identifier.issn
1680-7367
dc.identifier.other
10.5194/acp-18-15767-2018
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/304162
dc.identifier.doi
10.3929/ethz-b-000304162
dc.description.abstract
Ice crystal submicron structures have a large impact on the optical properties of cirrus clouds and consequently on their radiative effect. Although there is growing evidence that atmospheric ice crystals are rarely pristine, direct in situ observations of the degree of ice crystal complexity are largely missing. Here we show a comprehensive in situ data set of ice crystal complexity coupled with measurements of the cloud angular scattering functions collected during a number of observational airborne campaigns at diverse geographical locations. Our results demonstrate that an overwhelming fraction (between 61% and 81%) of atmospheric ice crystals sampled in the different regions contain mesoscopic deformations and, as a consequence, a similar flat and featureless angular scattering function is observed. A comparison between the measurements and a database of optical particle properties showed that severely roughened hexagonal aggregates optimally represent the measurements in the observed angular range. Based on this optical model, a new parameterization of the cloud bulk asymmetry factor was introduced and its effects were tested in a global climate model. The modelling results suggest that, due to ice crystal complexity, ice-containing clouds can induce an additional short-wave cooling effect of −1.12Wm2 on the top-of-the-atmosphere radiative budget that has not yet been considered.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Copernicus
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Additional global climate cooling by clouds due to ice crystal complexity
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2018-11-02
ethz.journal.title
Atmospheric Chemistry and Physics
ethz.journal.volume
18
en_US
ethz.journal.issue
21
en_US
ethz.journal.abbreviated
Atmos. chem. phys.
ethz.pages.start
15767
en_US
ethz.pages.end
15781
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Göttingen
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::03690 - Lohmann, Ulrike / Lohmann, Ulrike
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::03690 - Lohmann, Ulrike / Lohmann, Ulrike
ethz.date.deposited
2018-11-16T05:41:51Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2018-11-28T16:20:18Z
ethz.rosetta.lastUpdated
2019-01-03T12:36:07Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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