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dc.contributor.author
Mahrt, Fabian
dc.contributor.author
Kilchhofer, Kevin
dc.contributor.author
Marcolli, Claudia
dc.contributor.author
Grönquist, Philippe
dc.contributor.author
David, Robert O.
dc.contributor.author
Rösch, Michael
dc.contributor.author
Lohmann, Ulrike
dc.contributor.author
Kanji, Zamin A
dc.date.accessioned
2019-08-12T15:23:24Z
dc.date.available
2019-04-30T16:26:08Z
dc.date.available
2019-08-09T15:02:51Z
dc.date.available
2019-08-12T08:41:33Z
dc.date.available
2019-08-12T12:04:16Z
dc.date.available
2019-08-12T13:07:12Z
dc.date.available
2019-08-12T14:22:05Z
dc.date.available
2019-08-12T15:03:31Z
dc.date.available
2019-08-12T15:23:24Z
dc.date.issued
2019
dc.identifier.issn
0148-0227
dc.identifier.issn
2169-897X
dc.identifier.uri
http://hdl.handle.net/20.500.11850/340269
dc.identifier.doi
10.3929/ethz-b-000340269
dc.description.abstract
Soot particles are generally considered to be poor ice nucleating particles. Involvement of soot in clouds and their release back into the atmosphere can form residual particles with altered cloud forming potential. The impact and extent of such different cloud processing scenarios on ice nucleation is however not well understood. In this work, we present the impact of cloud processing of soot aerosols on subsequent ice nucleation cycles at T ≤ 233 K. Coupling of two continuous flow diffusion chambers allows the simulation of different cloud processing scenarios and investigation of subsequent ice nucleation activity of the processed particles. The processing scenarios presented here encompass contrail, cirrus and mixed-phase cloud processing, mimicking typical pathways that soot particles can be exposed to in the atmosphere. For all scenarios tested, the processed particles showed an enhanced ice active fraction for T < 233 K. The relative humidity with respect to water for the ice nucleation onset was observed to be on average approximately 10 % (RHi = 16 %) lower for the cloud processed particles compared to the unprocessed soot, for which ice nucleation was observed close to or at homogeneous freezing conditions of solution droplets. We attribute the enhanced ice nucleation abilities of the cloud processed soot to a pore condensation and freezing mechanism and have identified key parameters governing these changes. Enhanced ice nucleation abilities of soot in cirrus clouds can have significant impacts, given the importance of the atmospheric ice phase for precipitation formation and global climate.
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dc.format
text/csv
en_US
dc.format
text/plain
en_US
dc.language.iso
en
en_US
dc.publisher
ETH Zurich
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.title
The Impact of Cloud Processing on the Ice Nucleation Abilities of Soot Particles at Cirrus Temperatures
en_US
dc.type
Dataset
dc.rights.license
In Copyright - Non-Commercial Use Permitted
dc.date.published
2019-08-12
ethz.size
232.19 kB
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ethz.publication.place
Zurich
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.date.retentionend
indefinite
en_US
ethz.date.retentionendDate
n/a
ethz.date.deposited
2019-04-30T16:26:24Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.exportRequired
true
ethz.COinS
ctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.atitle=The%20Impact%20of%20Cloud%20Processing%20on%20the%20Ice%20Nucleation%20Abilities%20of%20Soot%20Particles%20at%20Cirrus%20Temperatures&amp;rft.date=2019&amp;rft.issn=0148-0227&amp;2169-897X&amp;rft.au=Mahrt,%20Fabian&amp;Kilchhofer,%20Kevin&amp;Marcolli,%20Claudia&amp;Gr%C3%B6nquist,%20Philippe&amp;David,%20Robert%20O.&amp;rft.genre=unknown&amp;rft.btitle=The%20Impact%20of%20Cloud%20Processing%20on%20the%20Ice%20Nucleation%20Abilities%20of%20Soot%20Particles%20at%20Cirrus%20Temperatures
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