The evolution and enhancement of occluded frontal circulation in upper-level westerly jet and lower-level southerly jet are discussed by using a dry primitive equation model.
利用原始方程模式探讨了高空西风急流和低空南风急流中锢囚锋环流的演变和增强机制。
The downward momentum transportation produced by the high-altitude westerly jet with the suitable vertical circulation is the main reason of the strong gale beyond general cold.
高空西风急流配合适合的垂直环流，产生动量下传，是超出一般强度的冷空气大风产生的原因；
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