Based on the oblique model scheme provided in the Appendix analysisis made of the teleconnectional structure (TCS) of the January 500 hPacontour field over the Northern Hemisphere, resulting in a series of telecon-nectional patterns representative of the main features of the TCS. Amongthem, the WPAA (Western Pacific/Asia/America) pattern is found forthe first time to be closely related to the circulation over East Asia. Control analysis indicates that the TCS is highly sensitive to the march ofseasons. This suggests that examination of the TCS of the Northern Hemi-spheric circulation on a month-to-month basis may be valuable.