polar front

Subtropical high and polar front , whose evolutions and adjustments may modify typhoon movement , are the main synoptic systems which influence the track of landfall typhoon .

副热带高压和极锋是影响热带气旋陆地路径的主要天气系统，它们的演变和调整会影响热带气旋的移向。

The magnitude of seasonally meridional migration in the location of the primary Polar Front ( PF1 ) is much less than that of the climatic monthly mean zero wind stress curl , but is near the mean position of zero wind stress curl .

第一极锋（PF1）位置的经向季节变化幅度远小于气候月平均零旋度线的经向季节变化幅度，但位于零旋度线的平均位置附近。

The Polar Front retreats about one degree southward in latitude in recent four years , compared with that in 1979,1991 and 1992 in the same area and season .

与19791991和1992年该区域同期的资料相比，近4a观测到的极地锋显著偏南1个纬距以上。

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。

There exist close relation between the floods season precipitation in Northeast China and the anomalies of subtropical summer monsoon , the anomalies of cold air , Sub-tropical anticyclone , polar front jet , North hemisphere general circulation anomalies in winter .

东北汛期降水与西南夏季风、北方冷空气、副热带高压、极锋急流、前期冬季环流异常密切相关。