旋转流体物理实验中见到的大气环流特征  

THE ATMOSPHERIC CIRCULATION FEATURES SEEN IN THE ROTATING FLUID PHYSICS EXPERIMENTS

作　　者：李国庆[1] Robin Kung Richard L.Pfeffer 

机构地区：[1]中国科学院大气物理研究所 [2]Geophysical Fluid Dynamics Institute, Florida State University, Tallahassee, Florida, 32306 [3]Geophysical Fluid Dynamics Institute and Department of Meteorology,Florida State University, Tallahassee, Florida, 32306

出　　处：《气象学报》1993年第4期405-413,共9页Acta Meteorologica Sinica

摘　　要：在合适的实验参数下，在旋转斜压流中，大尺度地形强迫造成低频振荡以及大气环流中的“阻塞”流型。这是由于地形强迫造成的准止波与行进波的相互作用及共振引起的。地形把波数单一的流动变成多波数的流动。地形强迫使波数减少。Under suitable imposed experimental parameters, near thermal Rossby number ROT=0.1 and Taylor number Ta=2.2×l07, the large-scale topography forcing produces low-frequency oscillation in the flow and rather long-lived flow pattern resembling blocking in the atmospheric circulation. The 'blocking' phenomenon is caused by interaction and resonance of travelling waves and the quasi-stationary waves formed by topography forcing.The large-scale topography transforms wavenumber-homogeneous flows into multi-wavenumber flows, and the topography-forced flows possess less wave-number.

关 键 词：旋转流体实验 地形影响 大气环流 

分 类 号：P434[天文地球—大气科学及气象学]