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dc.contributor.author
Dedekind, Zane
dc.contributor.author
Lauber, Annika
dc.contributor.author
Ferrachat, Sylvaine
dc.contributor.author
Lohmann, Ulrike
dc.date.accessioned
2021-10-14T04:47:37Z
dc.date.available
2021-10-14T00:29:07Z
dc.date.available
2021-10-14T04:47:37Z
dc.date.issued
2021-10-12
dc.identifier.issn
1680-7375
dc.identifier.issn
1680-7367
dc.identifier.other
10.5194/acp-21-15115-2021
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/509592
dc.identifier.doi
10.3929/ethz-b-000509592
dc.description.abstract
The discrepancy between the observed concentration of ice nucleating particles (INPs) and the ice crystal number concentration (ICNC) remains unresolved and limits our understanding of ice formation and, hence, precipitation amount, location and intensity. Enhanced ice formation through secondary ice production (SIP) could account for this discrepancy. Here, in a region over the eastern Swiss Alps, we perform sensitivity studies of additional simulated SIP processes on precipitation formation and surface precipitation intensity. The SIP processes considered include rime splintering, droplet shattering during freezing and breakup through ice–graupel collisions. We simulated the passage of a cold front at Gotschnagrat, a peak at 2281 m a.s.l. (above sea level), on 7 March 2019 with the Consortium for Smallscale Modeling (COSMO), at a 1 km horizontal grid spacing, as part of the RACLETS (Role of Aerosols and CLouds Enhanced by Topography and Snow) field campaign in the Davos region in Switzerland. The largest simulated difference in the ICNC at the surface originated from the breakup simulations. Indeed, breakup caused a 1 to 3 orders of magnitude increase in the ICNC compared to SIP from rime splintering or without SIP processes in the control simulation. The ICNCs from the collisional breakup simulations at Gotschnagrat were in best agreement with the ICNCs measured on a gondola near the surface. However, these simulations were not able to reproduce the ice crystal habits near the surface. Enhanced ICNCs from collisional breakup reduced localized regions of higher precipitation and, thereby, improved the model performance in terms of surface precipitation over the domain.
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.subject
Modeling and simulation
en_US
dc.subject
Microphysics
en_US
dc.subject
Mixed-phase clouds
en_US
dc.subject
Secondary ice production
en_US
dc.title
Sensitivity of precipitation formation to secondary ice production in winter orographic mixed-phase clouds
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Atmospheric Chemistry and Physics
ethz.journal.volume
21
en_US
ethz.journal.issue
19
en_US
ethz.journal.abbreviated
Atmos. chem. phys.
ethz.pages.start
15115
en_US
ethz.pages.end
15134
en_US
ethz.size
20 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Exploiting orographic clouds for constraining the sources of ice crystals
en_US
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
en_US
ethz.grant.agreementno
175824
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Projektförderung in Mathematik, Natur- und Ingenieurwissenschaften (Abteilung II)
ethz.relation.cites
10.3929/ethz-b-000511939
ethz.date.deposited
2021-10-14T00:29:14Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-10-14T04:47:44Z
ethz.rosetta.lastUpdated
2021-10-14T04:47:44Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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