  An atmospheric general circulation model (AGCM) with idealized and complete
physics has been used to evaluate the Tropical Easterly Jet (TEJ) jet. In
idealized physics, the role of upper tropospheric friction has been found to be
important in getting realistic upper tropospheric zonal wind patterns in
response to heating. In idealized physics, the location and strength of the TEJ
as a response to Gill heating has been studied. Though the Gill model is
considered to be widely successful in capturing the lower tropospheric
response, it is found to be inadequate in explaining the location and strength
of the upper level TEJ. Heating from the Gill model and realistic upper
tropospheric friction does not lead to the formation of a TEJ.
