Abstracts for the 5th International GAME Conf.

3-5 October 2001

Aichi Trade Center

Nagoya Japan

Observational study of a developing rainband associated with Meiyu front

Geng, Biao (1), Tsuboki, Kazuhisa (2), Takeda, Takao (2), Fujiyoshi, Yasushi (4), Uyeda, Hiroshi (2)

The structure and evolution of a rainband associated with Meiyu front@were analyzed by using satellite, conventional radar, Doppler radar, surface mesonet, and upper-air sounding data from the 1998 Huaihe River Basin Experiment (HUBEX). Satellite and conventional radar data indicated that the rainband evolved from a complex-distributed convective cluster observed on 29 June 1998. The rainband became bow-shaped as it developed and moved southward. While the length of the developed rainband was more than 400 km, the precipitation cores and strong convective cells associated with the rainband were confined to a 20-30-km belt. Convective cells were not so high, with the echo top of 10 dBZ below 12 km. Meanwhile, a little stratiform area was found to the rear of convective region. The rainband lasted more than 6 hours and was maintained mainly through the development of new convective cells in front of it. Doppler radar, surface mesonet, and upper-air sounding data indicated that a middle-level mesoscale cyclone developed during the evolution of the rainband. It is found that the formation and development of the narrow rainband were accompanied by the development of middle- to upper-level northwesterly flow not reaching the surface. It is suggested that the development and organization of the rainband would be associated with cold frontogenesis aloft.

Submittal Information

Name : Date :
    Dr. Geng, Biao
    04-Jun-01-15:32:02
Organization : Theme :
    Frontier Observational Research System for Global Change
    Theme 2
Address : Presentation :
    Showamachi, Kanazawaku, Yokohama 236-0001
    Poster or oral
Country : Abstract ID :
    Japan
    T2DGB04Jun01153202
Phone : Fax :
    +81-45-778-5654
    +81-45-778-5706
E-mail :
    bgeng@jamstec.go.jp