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dc.contributor.author
Conen, Franz
dc.contributor.author
Rodríguez, Sergio
dc.contributor.author
Christoph, Hülin
dc.contributor.author
Henne, Stephan
dc.contributor.author
Herrmann, Erik
dc.contributor.author
Bukowiecki, Nicolas
dc.contributor.author
Alewell, Christine
dc.date.accessioned
2019-11-25T15:04:15Z
dc.date.available
2017-06-11T16:47:50Z
dc.date.available
2019-11-25T15:04:15Z
dc.date.issued
2015
dc.identifier.issn
0280-6509
dc.identifier.issn
1600-0889
dc.identifier.other
10.3402/tellusb.v67.25014
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/99614
dc.identifier.doi
10.3929/ethz-b-000099614
dc.description.abstract
The state of a slightly supercooled ephemeral cloud can be changed by the presence of a few particles capable of catalysing freezing, and potentially result in precipitation. We investigated the atmospheric abundance of particles active as ice nuclei at −8°C (IN−8) over the course of a year at the high-alpine station Jungfraujoch (3580 m.a.s.l., Switzerland) through the use of immersion freezing assays of particles collected on quartz micro-fibre filters. In addition, we determined IN−8 on a hill in the planetary boundary layer 95 km northwest of Jungfraujoch and in the dust laden Saharan Air Layer reaching Tenerife. Results indicate a strong seasonality of IN−8 at Jungfraujoch. Values were largest during summer (between 1 and 10 m−3) and about two orders of magnitude smaller during winter. Sahara dust events had a negligible influence on IN−8 at Jungfraujoch. Seasonality in the boundary layer was not observed in the upper, but in the lower bound of IN−8 values. Values<1 m−3 were only found on cold winter days, when IN−8 were more likely to have already been activated and deposited than on warmer days. A good correlation between IN−8 and maximum daily temperature at Jungfraujoch (R2=0.54) suggests IN−8 abundance at Jungfraujoch may be limited most of the year by microphysical processing related to IN activation in approaching air masses.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
International Meteorological Institute in Stockholm
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Ice nuclei
en_US
dc.subject
Slight supercooling
en_US
dc.subject
Seasonal cycle
en_US
dc.subject
Desert dust
en_US
dc.title
Atmospheric ice nuclei at the high-altitude observatory Jungfraujoch, Switzerland
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2015-02-05
ethz.journal.title
Tellus B: Chemical and Physical Meteorology
ethz.journal.volume
67
en_US
ethz.journal.issue
1
en_US
ethz.pages.start
25014
en_US
ethz.size
11 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.nebis
000017639
ethz.publication.place
Stockholm
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2017-06-11T16:48:41Z
ethz.source
ECIT
ethz.identifier.importid
imp5936530eb4b6f84721
ethz.ecitpid
pub:155919
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-18T11:49:28Z
ethz.rosetta.lastUpdated
2019-11-25T15:04:28Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.atitle=Atmospheric%20ice%20nuclei%20at%20the%20high-altitude%20observatory%20Jungfraujoch,%20Switzerland&amp;rft.jtitle=Tellus%20B:%20Chemical%20and%20Physical%20Meteorology&amp;rft.date=2015&amp;rft.volume=67&amp;rft.issue=1&amp;rft.spage=25014&amp;rft.issn=0280-6509&amp;1600-0889&amp;rft.au=Conen,%20Franz&amp;Rodr%C3%ADguez,%20Sergio&amp;Christoph,%20H%C3%BClin&amp;Henne,%20Stephan&amp;Herrmann,%20Erik&amp;rft.genre=article&amp;
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