[1] LAU K M, SHEN P. Annual cycle, QBO, and southern oscillation in global precipitation [J]. Journal ofGeophysics Research, 1988, 93: 10975-10988.
[2] RUSMUSSON E M, WANG X, ROPELEWSKI C. The biennial component of ENSO variability [J]. Journalof Marine Science, 1990, 1: 71-96.
[3] BARNETT T P. The interaction of multiple time scales in the tropical climate system [J]. Journal of Climate,1991, 4: 269-285.
[4] ROPELEWSKI C F, HALPERT M S, WANG X. Observed tropospheric biennial variability and itsrelationship to the southern oscillation [J]. Journal of Climate, 1992, 5: 594-614.
[5] SHUKLA J. Long range forecasting of Indian monsoons[J]. Science Age, 1987(Nov), 21-23.
[6] SHUKLA J. Short term climate variability and prediction[A]. JAGER J, FERGUSON H J. Proceedings of thesecond world climate conference [C]. Cambridge University Press, 1991. 203-210.
[7] ZOU Li, NI Yun-qi. Impact of ENSO on the variability of the summer monsoon over Asia and the summerrainfall in China [J]. Journal of Tropical Meteorology, 1997, 13: 306-314.
[8] LI Chong-yin. Frequent activity of strong East Asian Trough and the onset of El Ni?o [J]. Scientia Sinica(Series B), 1988, (6): 667-674.