Characteristics of generating cells in wintertime orographic clouds

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dc.contributor.author
Tessendorf, Sarah A.
Ikeda, Kyoko
Rasmussen, Roy M.
French, Jeffrey
Rauber, Robert M.
Korolev, Alexei
Xue, Lulin
Blestrud, Derek R.
Dawson, Nicholas
Meadows, Melinda
Kunkel, Melvin L.
Parkinson, Shaun
dc.date.accepted
2023-12-15
dc.date.accessioned
2025-04-15T15:27:03Z
dc.date.available
2025-04-15T15:27:03Z
dc.date.issued
2024-03-06
dc.date.submitted
2023-02-22
dc.description - en
Cloud-top generating cells are frequently observed on radar and exhibited enhanced concentrations of drizzle and ice particles, which suggests the environments of these fine-scale features promote precipitation formation. The source of ice formation in winter clouds is critical to understanding and modelling the precipitation formation process.
dc.description.abstract - en
During the Seeded and Natural Orographic Wintertime clouds: the Idaho Experiment (SNOWIE) field campaign, cloud-top generating cells were frequently observed in the very high-resolution W-band airborne cloud radar data. This study examines multiple flight segments from three SNOWIE cases that exhibited cloud-top generating cells structures, focusing on the in situ measurements inside and outside these cells to characterize the microphysics of these cells. The observed generating cells in these three cases occurred in cloud tops of −15° to −30°C, with and without overlying cloud layers, but always with shallow layers of atmospheric instability observed at cloud top. The results also indicate that liquid water content, vertical velocity, and drizzle and ice crystal concentrations are greater inside the generating cells compared to the adjacent portions of the cloud. The generating cells were predominantly <500 m in horizontal width and frequently exhibited drizzle drops coexisting with ice. The particle imagery indicates that ice particle habits included plates, columns, and rimed and irregular crystals, likely formed via primary ice nucleation mechanisms. Understanding the sources of natural ice formation is important to understanding precipitation formation in winter orographic clouds, and is especially relevant for clouds that may be targeted for glaciogenic cloud seeding as well as to improve model representation of these clouds.
dc.description.fosrcfull - en
Copyright 2024 American Meteorological Society (AMS). For permission to reuse any portion of this Work, please contact <a href = "mailto: permissions@ametsoc.org">permissions@ametsoc.org</a>. Any use of material in this Work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC § 108) does not require the AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS. All AMS journals and monograph publications are registered with the Copyright Clearance Center (<a href="https://www.copyright.com">https://www.copyright.com</a>). Additional details are provided in the AMS Copyright Policy statement, available on the AMS website (<a href="https://www.ametsoc.org/PUBSCopyrightPolicy">https://www.ametsoc.org/PUBSCopyrightPolicy</a>)
dc.description.fosrcfull-fosrctranslation - fr
Droit d'auteur 2024 American Meteorological Society (AMS). Pour obtenir l'autorisation de réutiliser toute partie de cette œuvre, veuillez contacter <a href = "mailto: permissions@ametsoc.org">permissions@ametsoc.org</a>. Toute utilisation d'un élément de cette œuvre considérée comme une "utilisation équitable" par l'article 107 de la loi américaine sur le droit d'auteur (U.S. Copyright Act, 17 U.S. Code § 107) ou satisfaisant aux conditions énoncées à l'article 108 de la loi américaine sur le droit d'auteur (U.S. Copyright Act, 17 U.S. Code § 108) ne requiert pas l'autorisation de l'AMS. La republication, la reproduction systématique, l'affichage sous forme électronique, par exemple sur un site web ou dans une base de données interrogeable, ou toute autre utilisation de ce matériel, à l'exception de ce qui est exempté par la déclaration ci-dessus, nécessite une autorisation écrite ou une licence de la part de l'AMS. Toutes les revues et monographies de l'AMS sont enregistrées auprès du Copyright Clearance Center (<a href="https://www.copyright.com">https://www.copyright.com</a>). Des détails supplémentaires sont prévu dans la déclaration de politique de droit d'auteur de l'AMS, disponible sur le site web de l'AMS (<a href="https://www.ametsoc.org/PUBSCopyrightPolicy">https://www.ametsoc.org/PUBSCopyrightPolicy</a>)
dc.description.fosrctranslation - fr
Les cellules génératrices au sommet des nuages sont fréquemment observées par radar et présentent des concentrations accrues de bruine et de particules de glace, ce qui suggère que les environnements de ces caractéristiques de fine échelle favorisent la formation des précipitations. Il est essentiel de connaître la source de la formation de glace dans les nuages hivernaux pour comprendre et modéliser le processus de formation des précipitations.
dc.identifier.doi
https://doi.org/10.1175/JAS-D-23-0029.1
dc.identifier.issn
0022-4928
1520-0469
dc.identifier.uri
https://open-science.canada.ca/handle/123456789/3603
dc.language.iso
en
dc.publisher - en
American Meteorological Society
dc.rights - en
Other
dc.rights - fr
Autre
dc.rights.openaccesslevel - en
Green
dc.rights.openaccesslevel - fr
Vert
dc.rights.uri - en
#description-element
dc.rights.uri - fr
#description-element
dc.subject - en
Meteorology
Aircraft
Radar
Ice
dc.subject - fr
Météorologie
Aéronef
Radar
Glace
dc.subject.en - en
Meteorology
Aircraft
Radar
Ice
dc.subject.fr - fr
Météorologie
Aéronef
Radar
Glace
dc.title - en
Characteristics of generating cells in wintertime orographic clouds
dc.title.alternative - fr
Caractéristiques des cellules génératrices dans les nuages orographiques hivernaux
dc.type - en
Article
dc.type - fr
Article
local.article.journalissue
3
local.article.journaltitle - en
Journal of the Atmospheric Sciences
local.article.journalvolume
81
local.pagination
649-673
local.peerreview - en
Yes
local.peerreview - fr
Oui
local.requestdoi
No
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