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dc.contributor.author
Gasparini, Blaž
dc.contributor.author
Münch, Steffen
dc.contributor.author
Poncet, Laure
dc.contributor.author
Feldmann, Monika
dc.contributor.author
Lohmann, Ulrike
dc.date.accessioned
2018-10-26T09:23:10Z
dc.date.available
2017-06-12T21:00:57Z
dc.date.available
2018-10-26T09:23:10Z
dc.date.issued
2017
dc.identifier.issn
1680-7375
dc.identifier.issn
1680-7367
dc.identifier.other
10.5194/acp-17-4871-2017
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/130794
dc.identifier.doi
10.3929/ethz-b-000130794
dc.description.abstract
The complex microphysical details of cirrus seeding with ice nucleating particles (INPs) in numerical simulations are often mimicked by increasing ice crystal sedimentation velocities. So far it has not been tested whether these results are comparable to geoengineering simulations in which cirrus clouds are seeded with INPs. We compare simulations where the ice crystal sedimentation velocity is increased at temperatures colder than −35°C with simulations of cirrus seeding with INPs using the ECHAM-HAM general circulation model. The radiative flux response of the two methods shows a similar behaviour in terms of annual and seasonal averages. Both methods decrease surface temperature but increase precipitation in response to a decreased atmospheric stability. Moreover, simulations of seeding with INPs lead to a decrease in liquid clouds, which counteracts part of the cooling due to changes in cirrus clouds. The liquid cloud response is largely avoided in a simulation where seeding occurs during night only. Simulations with increased ice crystal sedimentation velocity, however, lead to counteracting mixed-phase cloud responses. The increased sedimentation velocity simulations can counteract up to 60% of the radiative effect of CO2 doubling with a maximum net top-of-the-atmosphere forcing of −2. 2Wm−2. They induce a 30% larger surface temperature response, due to their lower altitude of maximum diabatic forcing compared with simulations of seeding with INPs.
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/3.0/
dc.title
Is increasing ice crystal sedimentation velocity in geoengineering simulations a good proxy for cirrus cloud seeding?
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2017-04-13
ethz.journal.title
Atmospheric Chemistry and Physics
ethz.journal.volume
17
en_US
ethz.journal.issue
7
en_US
ethz.journal.abbreviated
Atmos. chem. phys.
ethz.pages.start
4871
en_US
ethz.pages.end
4885
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.identifier.nebis
004294181
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
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::03690 - Lohmann, Ulrike / Lohmann, Ulrike
ethz.date.deposited
2017-06-12T21:01:11Z
ethz.source
ECIT
ethz.identifier.importid
imp5936556f13d1414891
ethz.ecitpid
pub:193825
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-31T17:33:30Z
ethz.rosetta.lastUpdated
2018-10-26T09:23:28Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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