Internal airflow of a convective storm from dual-Doppler radar measurements
Internal airflow of a convective storm from dual-Doppler radar measurements
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双多普勒雷达测量的对流风暴的内部气流
DOI：
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发表时间：
1975
期刊：
影响因子：
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通讯作者：
L. J. Miller
中科院分区：
文献类型：
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作者：
L. J. Miller
利用双多普勒雷达共平面扫描和数据归约的方法，确定了对流风暴的内部气流和雷达反射率结构。在中等切变风环境中发展的积云对流导致了一场非稳定、中等强度的雷暴。在下切变方向倾斜的上升气流的下切变过程中，发现了降水落点和下移气流。快速的风暴平移，环境风的垂直切变，以及流入的空气在云下缓慢上升，形成了这种观测到的气流形态。地面没有明显的冷空气外流及其伴随的阵风锋面的原因是：(I)缓慢移动的空气明显流入中层下沉气流，以及(Ii)潜在最冷空气位置太低，对深层下沉环流没有显著贡献。
The dual-Doppler radar coplane method of scanning and data reduction has been used to determine the internal airflow and radar reflectivity structure of a convective storm. Cumulus convection growing in a moderately sheared wind environment resulted in a nonsteady, moderate intensity thunderstorm. Precipitation fallout and downward moving air are found downshear of an updraft inclined in the downshear direction. Rapid storm translation, vertical shear of the ambient wind, and slow subcloud ascent of inflow air act to establish this observed draft configuration. The absence of significant cold air outflow and its attendant gust front at the surface is attributed to (i) appreciable inflow of slow moving air into the downdraft at the middle layers and (ii) the fact that the potentially coldest air was located too low to contribute significantly to a deep downdraft circulation.