The Circum-Pacific Teleconnection Pattern in meridional wind in the high troposphere
The Circum-Pacific Teleconnection Pattern (CPTP) is revealed in the meridional wind in the high troposphere via an emprirical orthogonal function (EOF) and correlation analysis on NCEP/NCAR re-analysis data. The CPTP is found to be composed of the North Pacific-North American teleconnection pattern (PNA), the South Pacific-South American teleconnection pattern (PSA), and the teleconnection patterns over the tropical western Pacific and the tropical eastern Pacific (or, Central America, or, tropical Atlantic). There is substantial interannual variability of the CPTP and a typical CPTP can be detected in some years. It is speculated that the zonal wind anomalies over the equatorial region in the western and eastern sides of the Pacific may play a role in linking the two hemispheres. The anomalous convection activities in the Tropics are plausible triggering factors for the zonal wind anomalies that are responsible for the composition of the CPTP.
Key wordsCPTP PNA PSA zonal wind anomaly tropical convection
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- Huang, R. H., and W. J. Li, 1988: Influence of the heat source anomalies over the western tropical Pacific on the subtropical high over East Asia during summer and its physical mechanism.Chinese J. Atmos. Sci., Special Issue on Frontiers in Atmospheric Sciences, 132–144.Google Scholar
- Huang, R. H., and F. Y. Sun, 1994: The impact of thermal state in the western Pacific warm pool and the convective activity above the warm pool on the East Asian climate anomalies.Chinese J. Atmos. Sci.,18, 141–151. (in Chinese)Google Scholar