摘要
在涡旋自组织动力学的框架内,利用f平面准地转正压模式讨论小尺度涡旋系统对两个中β尺度涡旋的自组织过程的影响。4组数值试验表明:小尺度涡旋的存在,可能会改变双涡相互作用的终态,使原本不合并的两个涡旋组织起来;双涡相互作用的终态对小尺度涡旋的初始位置敏感;存在"Z"型敏感区域,当小尺度涡旋出现在这一区域时,就有可能改变双涡相互作用的终态;小尺度涡旋对双涡相互作用产生影响需具备4个条件,即初始位于敏感区内,有足够的强度,距离适当且生存时间足够长。
In the framework of vortex self-organization dynamics,the influences of a small-scale system on the self-organization process of two meso-β vortices are investigated by utilizing an f-plane 2D quasi-geostrophic barotropic vorticity equation model. Four groups of numerical experiments are performed, and the results show that： the small-scale system may change the two vortices interaction and trigger the merging process;the final state is sensitive to the initial location of the small-scale system; there is a ＂Z＂ shape sensitive region, when a small-scale vortex initially appears there, resulting in the fact that the interaction stage of the two vortexes is more likely to be changed;for altering the vortices interaction results, the small-scale system should satisfy the following three necessary conditions：an initial position in the ＂Z＂ shape sensitive region, proper distances to other two vortices, enough intensity and longer life cycle.
出处
《南京气象学院学报》
CSCD
北大核心
2008年第2期158-166,共9页
Journal of Nanjing Institute of Meteorology
基金
国家自然科学基金资助项目(40333028)
关键词
涡旋
自组织
多尺度
vortex
self-organization
multi-scale
