A possible link of the QBOs between the stratosphere, troposphere and sea surface temperature in the tropics

Abstract

Some evidence is presented on the interaction of the QBOs between the stratospheric and the tropospheric zonal wind in the tropics. Zonal winds over some stations (Singapore, Koror, Ponape) in the equatorial Pacific clearly show the coherent vertical phase structure between the downward propagation of zonal wind anomalies in the stratosphere and the zonal wind anomalies in the lower and the upper troposphere. The QBOs in the tropospheric zonal wind are also proved to be coupled with that in the SST anomalies in the equatorial Pacific. These results suggest a possible dynamical link of the QBO in the large-scale coupled atmosphere/ ocean system over the Asian monsoon region through the equatorial Pacific with that in the equatorial stratosphere.