著者
Hisaki EITO Masataka MURAKAMI Chiashi MUROI Teruyuki KATO Syugo HAYASHI Hiroshi KUROIWA Masanori YOSHIZAKI
出版者
Meteorological Society of Japan
雑誌
気象集誌. 第2輯 (ISSN:00261165)
巻号頁・発行日
vol.88, no.4, pp.625-648, 2010 (Released:2010-10-05)
参考文献数
43
被引用文献数
15 17

During a cold-air outbreak, a broad cloud band is occasionally observed over the Japan-Sea Polar-Airmass Convergence Zone (JPCZ) that forms over the Sea of Japan from the base of the Korean Peninsula to the Japanese Islands. On 14 January 2001, a broad cloud band associated with the JPCZ (JPCZ cloud band) extended in a southeastward direction from the base of the Korean Peninsula to Wakasa Bay, and it stagnated for half a day. The JPCZ cloud band consisted of two cloud regions: one was a long cloud band extending along its southwestern edge (a developed convective cloud band), and the other was the region consisting of cloud bands normal to a wind direction of winter monsoon (transversal cloud bands). The structure and formation mechanism of the transversal cloud bands were examined on the basis of observations (e.g., satellite images, in situ measurement and cloud-pro.ling radar data from an instrumented aircraft and upper-air soundings from observation vessels) and simulation results of a cloud-resolving model with a horizontal resolution of 1 km.The transversal cloud bands had the following characteristic structures; they extended along a northeast-southwest direction, which was parallel to the direction pointed by the vertical shear vector of horizontal wind in the mixed layer, they mainly consisted of convective clouds, which slanted with height toward the down-shear side, and they widened and deepened toward southwest, as the depth of the mixed layer increased. An examination of simulation results presented that the transversal cloud bands were accompanied by roll circulations. The axes of rolls were oriented nearly parallel to the direction of the vertical shear vector in the mixed layer. An analysis of the eddy kinetic energy budget indicated that the roll circulations derived most of its energy from the mean vertical shear and the buoyancy.

言及状況

外部データベース (DOI)

Twitter (30 users, 30 posts, 141 favorites)

The Structure and Formation Mechanism of Transversal Cloud Bands Associated with the Japan-Sea Polar-Airmass Convergence Zone https://t.co/XqxbcJxls0
JPCZ(日本海寒帯気団収束帯)についてよく知りたいな…という皆様にお知らせです。 JMSJのEito et al. (2010)で、風向に直交する筋状雲の構造と発生メカニズムについて詳細に調査されていますので、お勧めです。(JMSJ編集委員なので、こっそり宣伝…) https://t.co/qcrIttyKO6 https://t.co/whabkkRgqo

収集済み URL リスト