Proceedings with Extended Abstracts (single PDF file) - Radio ...

precipitating clouds, the cyclonic wind becomes weak, and the outflows and vertical motionsseen in the front are not detected.3. Meso-and --scale features of rainbands and eyewallMeso-and --scale features of the eyewall and wide rainband in the front were examined.In the eyewall, the meso--scale remarkable updraft associated with the outflow region,considered to be a part of the vertical circulation, is found in the upper troposhere. Theoutflow region tilted outward originates from the area of maximum radial shear of thelow-level cyclonic wind. It extends to the updraft region within the upper-level band-shapedcloud. The wide rainband is located at the outer edge of the band-shaped cloud, and it lasts inthe development of the cloud. This accompanies the tilted outflow region, the bottom of whichis located at the maximum of the cyclonic wind. The narrow rainband, that had a quit short(1.5 hours) lifetime, was also examined based on the BLR observation. It is accompanied bythe tilted outflow region in its convective portion, but strong cyclonic wind, as seen in the widerainband, is not detected in the bottom of the outflow region. These results suggest that theoutflow with the wave-like structure, associated with the low-level strong cyclonic wind,contributes to the development and maintenance of the upper-level cloud and rainband.4. ConclusionsA general structure of Typhoon 9426 (Orchid) up to the lower stratosphere including theinner core region was observed by the MU radar in 29-30 September 1994. The kinematicstructure in the front and rear of the typhoon is quite different because of its transition frommature to decaying stages and the asymmetric distribution of cloud and precipitation. A meso--scale wind field and meso-and -scale features of precipitating clouds in the typhoonwere investigated in this study. In the future, we are expecting to use more transportablewind-profiling radars, and to accumulate observational case studies on typhoons.21 LST 29(d)Fig. 1: Horizontal distribution of taller clouds basedon TBB of GMS IR at 21 LST 29.Circle and crossmarks are locations of the MU site and the typhooncenter.259