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首页> 外文期刊>Journal of the Meteorological Society of Japan >Wind profiler observation on vertical structure of a Mei-yu front cloud bands
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Wind profiler observation on vertical structure of a Mei-yu front cloud bands

机译：梅雨锋云带垂直结构的风廓线观测

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摘要

An L-band wind profiler deployed at an industrial park (120.38°E, 22.6°N) close to Kao-Hsiung city in southern Taiwan is utilized to diagnose the vertical structure of Mei-yu frontal precipitating cloud systems observed during 9-11 June 2006. Observational results show several mesoscale convection systems associated with the Mei-yu frontal cloud produced heavy rainfall over Taiwan island. Mei-yu precipitating clouds are classified into three types: convective, mixed convective-stratiform and stratiform based on vertical profile of Signal-to-noise ratio (SNR)/Reflectivity and Doppler velocity during approaching, passing, and leaving stages of the cloud systems. In approaching and pre-passing stages of Mei-yu frontal clouds, a pre-dominant convective precipitation without a significant bright band is observed. In contrast, a pronounced bright band around 4 km was observed during post-passing and leaving stages of the frontal clouds with stratiform precipitation. Doppler velocity profiles show hydrometeors (ice/snow) at 5 km and rain below 4 km for stratiform precipitation. For Mei-yu frontal stratiform precipitation the melting particles accelerations of 3.3 ms~(-1) km~(-1) are observed for the bright band region.
机译：利用L波段风廓线仪部署在台湾南部高雄市附近的工业园区（120.38°E，22.6°N），用于诊断6月9日至11日观测到的梅雨锋降水云系统的垂直结构。 2006。观测结果表明，与梅雨锋云有关的几种中尺度对流系统在台湾岛上产生了大雨。基于云系统接近，通过和离开阶段的信噪比（SNR）/反射率和多普勒速度的垂直剖面，梅雨雨云分为对流，混合对流层状和层状三种类型。 。在梅雨锋额云的接近和超前阶段，观测到主要是对流降水，没有明显的亮带。相比之下，在前行云过后和离开云层的阶段有层状降水时，观察到了约4 km的明显亮带。多普勒速度剖面图显示了5 km处的水汽（冰/雪）和4 km以下的雨水，为层状降水。对于梅雨锋层状降水，在亮带区域观测到的熔融粒子加速度为3.3 ms〜（-1）km〜（-1）。

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