局域流型形成的初步研究

A NUMERICAL STUDY OF FORMATION OF LOCAL FLOW PATTERNS

中文关键词:  偶极子  局域流型  涡源强迫  能量频散

英文关键词:Energy dispersion  Local flow patterns  Vorticity forcing  Dipole form

中文摘要:

      文中提出一个具有东西向偶极子形态的涡源强迫的解析式。8组时间积分达36个模式日的试验结果表明:该涡源强迫可以激发出空间尺度约3000km,时间尺度为1个月的局域流型。局域流型对于强度扰动和位置扰动均具有稳定性性质。

英文摘要:

      Ananalytical formula of the vorticity forcing having the like dipole form is putforward. By using a quasigeostrophic barotropic model, eightexperiments whose integration times equal to 36 model days were performed. Results show that the vorticity forcing can creat local folw patterns with the space scale being about 3000 km, and the time scale being more than 30 model days. In the formation process of the patterns, the energy dispersion plays a leading role. The local flow patterns have stabilities for the intensity perturbation and the locational perturbation, respectively.