Summary
Global features of tropical convection, sea surface temperature (SST) and atmospheric circulation associated with the Pacific-Japan Oscillation (PJO) are examined by using monthly mean global data for 6 years (1979–1984). It is shown that the PJO is not a local phenomena limited to the western-Pacific but related to global-scale atmosphere-ocean variations.
The PJO highly correlates with interannual variations of SST in the tropical Pacific. During summers in which positive SST anomaly occurs in the tropical western Pacific, convective activity in the western Pacific especially near Philippines is strongly enhanced but that in the whole equatorial eastern Pacific is greatly suppressed due to negative SST anomaly in these areas.
The Walker circulation is intensified in the equatorial Pacific and twin cyclonic cells at 200 mb are generated in the subtropical Pacific of both hemispheres. Strong anticyclonic circulations take place in the northern middle latitudes extending from East China to Northwest Pacific. Anomalous circulations are also generated in the other extratropical regions in the both Northern and Southern Hemispheres.
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References
Kurihara, K., Kawahara, M., 1986: Extremes of East Asian weather during the post ENSO years of 1983/84. Severe cold winter and hot dry summer.J. Meteor. Soc. Japan,64, 493–503.
Kurihara, K., Tsuyuki, T., 1987: Development of the barotropic high around Japan and its association with Rossby wave-like propagations over the North Pacific: An observational study of August 1984.J. Meteor. Soc. Japan,65, 237–246.
Nitta, Ts., 1986: Long-term variations of cloud amount in the western Pacific region.J. Meteor. Soc. Japan,64, 373–390.
Nitta, Ts., 1987: Convective activities in the tropical western Pacific and their impact on the northern hemisphere summer circulation.J. Meteor. Soc. Japan,65, 373–390.
Nitta, Ts., Maruyama, T., Motoki, T., 1986: Long-term variations of tropospheric circulations in the western Pacific region as derived from GMS cloud winds.J. Meteor. Soc. Japan,64, 895–911.
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Nitta, T. Global features of the Pacific-Japan Oscillation. Meteorl. Atmos. Phys. 41, 5–12 (1989). https://doi.org/10.1007/BF01032585
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DOI: https://doi.org/10.1007/BF01032585