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Observed Effect of Mesoscale Vertical Vorticity on Rotation Sense of Dust Devil-Like Vortices in an Urban Area

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Title: Observed Effect of Mesoscale Vertical Vorticity on Rotation Sense of Dust Devil-Like Vortices in an Urban Area
Authors: Fujiwara, Chusei Browse this author
Yamashita, Kazuya Browse this author
Fujiyoshi, Yasushi Browse this author →KAKEN DB
Issue Date: 1-Apr-2012
Publisher: Meteorological Society of Japan
Journal Title: SOLA
Volume: 8
Start Page: 25
End Page: 28
Publisher DOI: 10.2151/sola.2012-007
Abstract: Dust devil-like vortices were detected by a three-dimensional scanning coherent Doppler lidar (3D-CDL) in an urban area of Sapporo, Japan, from April 2005 to July 2007. A total of 57 strong, dust devil-like vortices with vertical vorticity exceeding 0.1 s^[-1] were detected in 8 days of the observation period and were associated with a convective cell (fish net) pattern of wind fields detected by the 3D-CDL. The observed vortices had both rotation senses for 7 days. However, all of 7 dust devil-like vortices were cyclonic on 4 October 2006 when cyclonic mesoscale circulation with 4.5 x 10^[-4] s^[-1] in vertical vorticity existed over the 3D-CDL observation area. This result is the observed evidence that mesoscale circulation affects rotation sense of vortices.
Type: article
URI: http://hdl.handle.net/2115/49502
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藤吉 康志

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