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HOME > Monitoring and Data > Oceanic & Atmospheric Data > Northern Hemisphere Teleconnection Patterns > Asian Summer
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Map (Positive Phase)

Plotted Historical Time Series : (January 1950-February 1997)

Table Archive of Indices Dating Back to 1950
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Table showing Calendar months when specific teleconnection patterns are important
The Asian Summer pattern is a prominent mode from June-August. The pattern is monopole in nature, with anomalies of the same sign observed throughout southern Asia and northeastern Africa. A positive phase of the pattern is indicated by above-normal heights throughout southern Asia and northeastern Africa. The Asian Summer pattern exhibits considerable interannual and interdecadal variability, with a pattern of one sign observed for several consecutive years, followed by a pattern of the opposite sign for several consecutive years. For example, a positive phase of the pattern dominated the summertime circulation from 1987-1990. This period was preceded by a three-year period (1984-1987) in which the negative phase of the pattern was prominent.


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Page last modified: September 27, 2002
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