埃尔尼诺发生前的北半球冬半年,印度洋到西太平洋由北向南的越赤道气流强,澳大利亚地区的台风多;埃尔尼诺发生年的北半球夏半年,印度洋到西太平洋由南向北的越赤道气流强,西北太平洋近赤道台风日数多.这表明亚洲季风区南北半球的相互作用对埃尔尼诺的发生、发展有重要的影响. Before the El Niño winter half year in the northern hemisphere, the Indian Ocean to the western Pacific from north to south across the equatorial strong current, the typhoon in Australia more; El Niño year of the Northern Hemisphere summer half year, the Indian Ocean to the west Pacific from south to north The strong cross-equatorial currents and the near-equatorial typhoon in the northwest Pacific show that the interaction between the northern and southern hemispheres of the Asian monsoon region has an important impact on the occurrence and development of El Niño.