Gutenberg Open Science: Application of holography and automated image processing for laboratory experiments on mass and fall speed of small cloud ice crystals

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-5608

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DC Field	Value	Language
dc.contributor.author	Weitzel, Maximilian	-
dc.contributor.author	Mitra, Subir K.	-
dc.contributor.author	Szakáll, Miklós	-
dc.contributor.author	Fugal, Jacob P.	-
dc.contributor.author	Borrmann, Stephan	-
dc.date.accessioned	2021-01-28T12:04:35Z	-
dc.date.available	2021-01-28T12:04:35Z	-
dc.date.issued	2020	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/5612	-
dc.description.abstract	An ice cloud chamber was developed at the Johannes Gutenberg University of Mainz for generating several thousand data points for mass and sedimentation velocity measurements of ice crystals with sizes less than 150 µm. Ice nucleation was initiated from a cloud of supercooled droplets by local cooling using a liquid nitrogen cold finger. Three-dimensional tracks of ice crystals falling through the slightly supersaturated environment were obtained from the reconstruction of sequential holographic images, automated detection of the crystals in the hologram reconstructions, and particle tracking. Through collection of the crystals and investigation under a microscope before and after melting, crystal mass was determined as a function of size. The experimentally obtained mass versus diameter (m(D)) power law relationship resulted in lower masses for small ice crystals than from commonly adopted parameterizations. Thus, they did not support the currently accepted extrapolation of relationships measured for larger crystal sizes. The relationship between Best (X) and Reynolds (Re) numbers for columnar crystals was found to be X=15.3 Re1.2, which is in general agreement with literature parameterizations.	en_GB
dc.description.sponsorship	DFG, Open Access-Publizieren Universität Mainz / Universitätsmedizin Mainz	de
dc.language.iso	eng	de
dc.rights	CC BY	*
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/deed.en	*
dc.subject.ddc	530 Physik	de_DE
dc.subject.ddc	530 Physics	en_GB
dc.subject.ddc	540 Chemie	de_DE
dc.subject.ddc	540 Chemistry and allied sciences	en_GB
dc.title	Application of holography and automated image processing for laboratory experiments on mass and fall speed of small cloud ice crystals	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-5608	-
jgu.type.dinitype	article	en_GB
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 09 Chemie, Pharmazie u. Geowissensch.	de
jgu.organisation.number	7950	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	Atmospheric chemistry and physics	de
jgu.journal.volume	20	de
jgu.journal.issue	23	de
jgu.pages.start	14889	de
jgu.pages.end	14901	de
jgu.publisher.year	2020	-
jgu.publisher.name	EGU	de
jgu.publisher.place	Katlenburg-Lindau	de
jgu.publisher.uri	https://doi.org/10.5194/acp-20-14889-2020	de
jgu.publisher.issn	1680-7324	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	530	de
jgu.subject.ddccode	540	de
jgu.publisher.doi	10.5194/acp-20-14889-2020
jgu.organisation.ror	https://ror.org/023b0x485
Appears in collections:	JGU-Publikationen

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