5Pedelaborde P. The Monsoons (Tr. by M. J. Clegg).London: Methuen, 1963. 196 pp.
6Webster P J, Yang S. Monsoon and ENSO: Selectively interactive systems. Quart. J. Roy. Meteor. Soc., 1992,118:877～926.
7Goswami B N, Krishnamurthy V, Annamalai H. A broad scale circulation index for the interannual variability of the Indian summer monsoon. Quart. J. Roy. Meteor. Soc.,1999, 125:611～633.
8Shukla J, Paolino D A. The Southern Oscillation and longrange forecasting of the summer monsoon rainfall over India. Mon. Wea. Rev. , 1983, 111:1830～1837.
9Wang Bin, Fan Zhen. Choice of South Asian summer monsoon indices. Bull. Amer. Meteor. Soc., 1999, 80: 629～638.
