| 摘 要： | This article investigates in detail the structure, genesis and development of parallel-type warm sector rainbands from radar observations. By comparing these observations with diagnostic results from temperature, pressure, moisture and wind data, which are both actually observed and numerically generated by a mesoscale model, and the theory of symmetric instability, it is found that the conditional symmetric instability might be responsible for the formation and development of these rainbands.
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