南支急流
- 【大气】southern branch jet stream
南支急流-
华南冷空气活动频繁，冬季冷空气来源于南支急流和中高纬低层，春季冷空气主要来源于南支急流。
Cold air is active in South China . In winter , cold air is from the southern branch of the westerly jet and the lower levels of the mid-high latitudes .
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在高空平直的西风环流下，沿南支西风急流带，有低压槽在冷空气垫之上东移，地面高气压区域中常有低压槽和锋生出现。
At this time if a trough in the south branch of the westerlies moves eastward over this cold cushion , then there offen appears a trough and frontogenesis in the region surface high .
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南支高空东风急流的增强与北支东风急流的动量下传，有利于南海台风生成。
3 , The development of the Southern branch of the easterly jet and the downward transport of the momentum of the nothern branch of the easterly jet favour the development of the typhoons .