Characteristics of Supercells in the Rainband of Numerically Simulated Cyclone Sidr
Characteristics of Supercells in the Rainband of Numerically Simulated Cyclone Sidr
复制标题
数值模拟气旋Sidr雨带中超级单体的特征
作者：
N. Akter;K. Tsuboki
气旋锡德中心以东有一条强烈雨带。雨带有两条由对流单体组成的强对流线（带轴）。为了研究对流单体的特征，通过使用云分辨模式进行了1公里分辨率的模拟。在这两个带轴，一些细胞表现出超细胞的特征结构。外轴的超级单体比内轴的超级单体有更强的上升气流、更强烈的降水和更长的寿命。内外轴强垂直切变环境下的CAPE和螺旋度值不同。在对流层的外轴东侧有一个大的水汽通量。另一方面，内轴以西的上层相对干燥。这些是影响两个带轴中细胞特性差异的额外因素。
Cyclone Sidr had an intense rainband east of the cyclone center. The rainband exhibited two strong convective lines (band axes) composed of convective cells. To study the characteristics of the convective cells, a simulation was performed at 1-km resolution by using a cloud-resolving model. In both band axes, some cells showed the characteristic structure of a supercell. Supercells within the outer axis had stronger updraft, more intense precipitation, and a longer lifetime than those of the inner axis. The values of the CAPE and helicity are different in the strong vertical shear environment of the inner and outer axes. A large moisture flux was present throughout the troposphere on the east side of the outer axis. On the other hand, the upper level west of the inner axis was relatively dry. These are additional factors affecting the differences in cell characteristics in the two band axes.
高影响天气系统数值预报：2007年第十七次国际水文计划培训班教材
DOI：
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发表时间：
2007
期刊：
影响因子：
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作者：
坪木 和久;榊原 篤志;名古屋大学地球水循環研究センター
通讯作者：
名古屋大学地球水循環研究センター