The regions of from polar to Greenland, from Southwest Europe to Etesian, from Baikal lake to the Japanese Sea and the Southeastern of North America are the major occurring areas of 500 hPa circulation anomaly over Northern Hemisphere.

• 极地到格陵兰岛附近、西南欧洲到地中海地区、贝加尔湖到日本海以及北美洲东南部地区是500 hPa高度场上环流异常的主要发生地区;