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 30 0 0 km,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。
An analytical formula of the vorticity forcing having the like dipole form is put forward. By using a quasigeostrophic barotropic model, eight experiments 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.
出处
《气象学报》
CSCD
北大核心
2000年第1期95-101,共7页
Acta Meteorologica Sinica
基金
国家自然科学基金!(项目号 :4 95752 59)
关键词
偶极子
涡源强迫
能量频散
气流
Energy dispersion, Local flow patterns, Vorticity forcing, Dipole form.
