Abstract
Abstract An idealized zonally asymmetric mean state in the Tropics is used to investigate the effects of atmospheric mean Walker circulations and sea surface temperatures on the zonal variability of tropical waves with positive- only wave–CISK heating. First, the effects of the zonally symmetric vertical and meridional shears of the mean zonal flow are investigated with different vertical profiles of convective heating and temperature lapse rate. With the observed vertical profile of temperature lapse rate in the Tropics, the effect of the vertical shear of the mean zonal flow on the fast waves (period about 2 weeks) associated with a maximum heating in the upper troposphere is found to be opposite to that on the slow waves (period about 4 weeks) with a maximum heating in the middle troposphere, while the vertical shear effects with an idealized constant lapse rate are quite similar. The meridional shear of the mean zonal flow acts only to reduce the effects of the vertical shear of the mean zonal flow. S...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
