The Structure and Evolution of a Simulated Midlatitude Cyclone over Land
The Structure and Evolution of a Simulated Midlatitude Cyclone over Land
复制标题
模拟陆地上空中纬度气旋的结构和演化
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
D. Schultz
中科院分区：
文献类型：
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作者：
C. Mass;D. Schultz
本文利用中尺度模式的模拟结果，描述了1987年12月14-16日在美国东半部发展的一个强气旋的三维温度和湿度结构的演变。一些具体的调查结果包括如下。·地表的遮挡过程似乎与经典范例相似，冷锋赶上了暖锋。高空是一个暖型的阻塞结构，它是上层斜压带与地面阻塞锋合并形成的。·与冷锋和暖锋相关的锋生最初是连续的，但随着系统的发展，冷锋北方部分的锋生沿着出现中断。一个单一的锋生功能似乎支持温暖和闭塞的前。·在地面冷锋之前观察到对流活动的准线性区域。这条对流线与高空湿度锋有关，这是一条强对流带。
Abstract Using output from a mesoscale model simulation, this paper describes the evolution of the three-dimensional temperature and humidity structures of an intense cyclone that developed over the eastern half of the United States during 14–16 December 1987. Some specific findings include the following. • The occlusion process at the surface appeared similar to the classical paradigm, with the cold front catching up with the warm front. Aloft, a warm-type occlusion structure formed as an upper baroclinic zone merged with the surface-based occluded front. • The frontogenesis associated with the cold and warm fronts was initially continuous, but as the system evolved, a break in the frontogenesis along the northern section of the cold front developed. A single frontogenesis feature appeared to support both the warm and occluded fronts. • A quasi-linear region of convective activity was observed in advance of the surface cold front. This convective line was associated with an upper-level humidity front, wh...