ANALYSIS OF THE TELECONNECTIONAL STRUCTURES OF THE 500-hPa HEIGHT FIELD OVER THE NH IN JANUARY

Based on the oblique mode scheme provided in the Appendix, and analysis is made of the teleconnectional structures (TNS) of the NH 500-hPa height field in January, resulting in a series of teleconnectional patterns re-presentative of the main features of TNS, of which the teleconnectional pattern WPAA (Western Pacific/Asian/ American) closely related to the East-Asian circulation is presented for the first time in this field of research. Contrast analysis indicates that TNS are so sensitive to the transition of seasons that a slight transition would bring about a considerable response. Hence the examination of the month-to-month TNS of the NH atmospher-ic circulations is indispensable.