HoloGondel: In situ cloud observations on a cable car in the Swiss Alps using a holographic imager
dc.contributor.author
Beck, Alexander
dc.contributor.author
Henneberger, Jan
dc.contributor.author
Schöpfer, Sarah
dc.contributor.author
Fugal, Jacob
dc.contributor.author
Lohmann, Ulrike
dc.date.accessioned
2019-05-10T08:50:19Z
dc.date.available
2017-06-12T20:02:58Z
dc.date.available
2019-05-10T08:50:19Z
dc.date.issued
2017-02-06
dc.identifier.issn
1867-1381
dc.identifier.issn
1867-8548
dc.identifier.other
10.5194/amt-10-459-2017
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/128907
dc.identifier.doi
10.3929/ethz-b-000128907
dc.description.abstract
In situ observations of cloud properties in complex alpine terrain where research aircraft cannot sample are commonly conducted at mountain-top research stations and limited to single-point measurements. The HoloGondel platform overcomes this limitation by using a cable car to obtain vertical profiles of the microphysical and meteorological cloud parameters. The main component of the HoloGondel platform is the HOLographic Imager for Microscopic Objects (HOLIMO 3G), which uses digital in-line holography to image cloud particles. Based on two-dimensional images the microphysical cloud parameters for the size range from small cloud particles to large precipitation particles are obtained for the liquid and ice phase. The low traveling velocity of a cable car on the order of 10ms−1 allows measurements with high spatial resolution; however, at the same time it leads to an unstable air speed towards the HoloGondel platform. Holographic cloud imagers, which have a sample volume that is independent of the air speed, are therefore well suited for measurements on a cable car. Example measurements of the vertical profiles observed in a liquid cloud and a mixed-phase cloud at the Eggishorn in the Swiss Alps in the winters 2015 and 2016 are presented. The HoloGondel platform reliably observes cloud droplets larger than 6.5µm, partitions between cloud droplets and ice crystals for a size larger than 25µm and obtains a statistically significantly size distribution for every 5m in vertical ascent.
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
HoloGondel: In situ cloud observations on a cable car in the Swiss Alps using a holographic imager
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
ethz.journal.title
Atmospheric Measurement Techniques
ethz.journal.volume
10
en_US
ethz.journal.issue
2
en_US
ethz.journal.abbreviated
Atmos. meas. tech.
ethz.pages.start
459
en_US
ethz.pages.end
476
en_US
ethz.size
18 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Göttingen
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
2017-06-12T20:03:34Z
ethz.source
ECIT
ethz.identifier.importid
imp5936554ad120c48845
ethz.ecitpid
pub:191836
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-13T16:58:36Z
ethz.rosetta.lastUpdated
2024-02-02T07:59:21Z
ethz.rosetta.versionExported
true
ethz.COinS
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