When low index circulation prevails over subtropics and tropics in Eastern Asia, there is meridional circulation in the southern hemisphere (especially in Australia), and there is a mass transport from the southern to northern hemisphere.

• 在东亚低纬度经向环流期间,南半球(特别在澳洲)也盛行经向环流,并且在澳洲附近从南半球向北半球的质量输送也最强烈;