Year-end Sale % OFF 
Abstract
The largeand meso-scale features of a subtropical rainband which caused thunderstorms over western Japan (-33N/130E) in 25-7 July 1981 are studied. This case aroused our interest because the convective activities persisted for about three days in the west side of a slowmoving ridge.Radar observations showed a persistent convective echo band of -800km length extending in NNW-SSE direction. This echo band was not accompanied with front-like strong thermal gradient. Satellite IR imageries showed that the rainband was a part of a long subtropical cloud zone formed along the northern periphery of the extremely moist tropical maritime airmass in the lower troposphere. The enhancement of cloud zone and the formation of the rainband was owing to the incessant feeding of moisture accompanied with the northward intrusion of the moist tropical maritime air along the western hem of the slow- moving ridge.Real data forecast experiments on the cloud zone and rainband were made using a coarseand a fine-mesh primitive equation model. While only the large-scale zone of weak precipitation relevant to the observed cloud zone was produced in the coarse-mesh (380kmmesh) model, the narrow rainband with low-level convergence was simulated in the finemesh (77km-mesh) model. The "dry experiment" (a experiment without condensation) did not produce any low-level convergence zone. This indicated influence of condensation process on the formation of this subtropical rainband.
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Meteorological Society of Japan. Ser. II
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
