Results show that the transition from the easterly to the westerly originates in the equatorial Indian Ocean, and from the westerly to the easterly in tropical America and the equatorial western Pacific.

• 结果表明；平流层QBO的演变特征是:东风向西风转换最早出现在印度洋赤道地区; 西风向东风转换最早出现在美洲和西太平洋赤道地区.