夏季青藏高原上空热源异常对北半球大气环流异常的作用
THE INFLUENCE OF THE HEAT SOURCE ANOMALY OVER TIBETAN PLATEAU ON THE NORTHERN HEMISPHERIC CIRCULATION ANOMALIES
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摘要: 本文应用缓变媒质中行星波的传播理论来研究夏季基本气流中定常行星波的三维传播解释夏季北半球大气环流三维遥相关的物理机制。本文还应用一个包括Rayleigh摩擦、Newton冷却及水平涡旋热力扩散的准地转34层球坐标模式来研究夏季青藏高原热源异常对北半球中、高纬度定常扰动系统的影响。计算结果表明夏季青藏高原上空的热源异常将产生北半球中、高纬度大气环流的异常;若青藏高原上空热源增强就会引起南亚高压增强,我国东北受槽控制而产生冷夏,并且将引起鄂霍茨克海上空高压加强,同时在阿拉斯加将产生槽,这与实际资料所得到的结果一致。Abstract: In this paper, the influence of the heat source anomaly over Tibetan Plateau on the stationary disturbance pattern over middle and high latitudes in the northern hemisphere is investigated by means of a quasigeostrophic, 34-level model with Rayleigh friction, Newtonian cooling effect and the horizontal.