THE DYNAMICAL ANALYSIS OF THE STRUCTURE OF B MESO-SCALE DOUBLE RAINBANDS IN MEIYU FRONT |
| |
| Authors: | WANG Chun-ming WANG Yuan and WU Rong-sheng |
| |
| Institution: | Key Laboratory for Mesoscale Severe Weather of Ministry of Education, Nanjing University, Nanjing 210093 China |
| |
| Abstract: | In this paper, an idealized perturbation following the "surge-flow conceptual model" for typical Meiyu frontal structure is designed to explain the β meso-scale structure ofrainbands in the Meiyu front using a non-hydrostatic, full-compressible storm-scale model including multi-phase microphysical parameterization. In addition, sensitivity numerical experiment on the vertical distribution of the ambient meridional wind is conducted to investigate the generation mechanism of β meso-scale double rainbands. The results of numerical experiments show that the cool and dry downdraft invading strengthened by the environmental aloft northerly wind plays a very important role to the generation and maintenance of the β meso-scale double rainbands.Moreover, the intensity and scale of the dry and cool downdraft invading are related to the intensity of the second circumfluence induced by mass adjustment when the acceleration of the westerly jet aloft occurs. |
| |
| Keywords: | dry and cool downdraft acceleration of westerly jet aloft |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《热带气象学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《热带气象学报(英文版)》下载免费的PDF全文 |
