  We calculate the angular momentum transport by gravito-inertial-Alfv\'en
waves and show that, so long as prograde and retrograde gravity waves are
excited to roughly the same amplitude, the sign of angular momentum deposit in
the radiative interior of the Sun is such as to lead to an exponential growth
of any existing small radial gradient of rotation velocity just below the
convection zone. This leads to formation of a strong thin shear layer (of
thickness about 0.3% R_\odot) near the top of the radiative zone of the Sun on
a time-scale of order 20 years. When the magnitude of differential rotation
across this layer reaches about 0.1 \mu Hz, the layer becomes unstable to shear
instability and undergoes mixing, and the excess angular momentum deposited in
the layer is returned to the convection zone. The strong shear in this layer
generates toroidal magnetic field which is also deposited in the convection
zone when the layer becomes unstable. This could possibly start a new magnetic
activity cycle seen at the surface.
