This paper is concerned with the effect of thermally stratification on the steady, two-dimensional
mixed convection flow of a micropolar fluid past a vertical stretching permeable surface saturated in porous
medium taking into account the effect of thermal radiation. The governing system of partial differential
equations describing the problem are converted into a system of non-linear ordinary differential
equations using similarity transformation. The resulting system of coupled nonlinear ordinary differential
equations is solved numerically using the Chebyshev spectral method. The numerical results for the
velocity, the micro-rotation and the temperature are displayed graphically showing the effects of various
parameters like the buoyancy parameter, the radiation parameter, the stratification parameter, the permeability
parameter and the suction/injection parameter. Moreover, the numerical values of the local skinfriction
coefficient, the wall couple stress and the local Nusselt number for these parameters are also tabulated
and discussed.