In an earlier answer there was a point raised about direction of shear(abetting/retarding) cyclone formation. It appears westerly shear hinders the formation of tropical cyclones and easterly shear enhances it. This should mean that cyclone formation is only allowed over monsoonal regions. Is that accurate ? From this article - Tropical wave dynamics and Heatinduced steady response.

it appears that in the presence of westerly shear Rossby waves have large amplitude at the upper troposphere whereas in the presence of easterly shear Rossby waves have large amplitude in the lower troposphere. Given that the precursors of tropical cyclones are equatorial waves can a clarification be provided in this regard ?

In an earlier question/answer Why are there no cyclones in the southern Atlantic basin there was a point raised about direction of shear(abetting/retarding) cyclone formation. It appears westerly shear hinders the formation of tropical cyclones and easterly shear enhances it. This should mean that cyclone formation is only allowed over monsoonal regions. Is that accurate ? From this article - Tropical wave dynamics and Heatinduced steady response.

it appears that in the presence of westerly shear Rossby waves have large amplitude at the upper troposphere whereas in the presence of easterly shear Rossby waves have large amplitude in the lower troposphere. Given that the precursors of tropical cyclones are equatorial waves can a clarification be provided in this regard ?