A different process occurs when there is interaction between a polar trough and the main polar front, giving rise to an instant occlusion.
当极地槽和主要的极锋相互作用，会产生不同的过程，会引起短暂的锢囚。
Besides, the evolutions of the polar vortex, the trough over Bast Asia and the subtropical high prior to Mei-Yu period are also related to the precipitation during Mei-Yu period.
在前期环流演变中发现极涡、东亚槽、副高等对梅雨的丰枯亦有较好的预兆反映。
Moreover, it is found that Siberia High, East Asian Trough, Polar Front Jet and the location of Polar Vortices are notable different, causing winter temperature anomalies in DaLian.
其中西伯利亚高压、极涡的位置、东亚大槽的强弱、极锋急流都差异显著，从而导致大连地区冬季气温的异常。
Moreover, it is found that Siberia High, East Asian Trough, Polar Front Jet and the location of Polar Vortices are notable different, causing winter temperature anomalies in DaLian.
其中西伯利亚高压、极涡的位置、东亚大槽的强弱、极锋急流都差异显著，从而导致大连地区冬季气温的异常。
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