一个温带海洋气旋爆发性发展的动力学分析
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摘要: 本文对1982年3月11~16日出现在西北太平洋地区的一个强温带海洋气旋的爆发性发展过程进行了诊断分析。重点讨论了斜压不稳定和非绝热加热过程在气旋发展不同阶段的特点和相互作用。分析揭示,在气旋发展初期低层与高层扰动在垂直方向是分离的,尺度和移速都不同。由高低层等熵位涡扰动的相对位相分析发现,在发展初期斜压不稳定条件对发展是不利的,而在爆发阶段则非常有利。由湿位涡和水汽辐合,等熵运动和非地转运动分析指出,非绝热加热过程在前边两个阶段都很重要。在爆发阶段斜压不稳定与非绝热加热过程相互作用,产生正反馈,使气旋得到爆发性发展。
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