in winter the center of the polar vortex locates about the north of pole, but in summer it shifts to the western hemisphere.
冬季的极涡中心基本位于极心附近偏北的位置,而夏季极涡中心则明显移向西半球。
the mechanisms coupling the stratosphere and troposphere have been studied by some scientists for understanding the effect of the polar vortex change on the lower circulation.
一些学者已通过平流层和对流层耦合机制的研究探索极涡变化对低层环流的作用。
meanwhile, planetary waves propagating upwards also affect the polar vortex in the stratosphere, and then affect the arctic centers of action of the ao.
同时準定常行星波冬季向上传播至平流层并与平流层极涡相互作用从而也影响了北极涛动在北极的活动中心。
it is evident positive relative between the arctic sea ice and the polar vortex area, yet the relation between the polar vortex area and intensity is so complex.
北极海冰面积和北半球极涡面积为明显的正相关,而北半球极涡面积和极涡强度之间的关系就较为复杂。