airfoil - What is the effect of flow separation on lift, pressure

Consider an airfoil (a wing) in an airflow. When angle of attack increases, at some point the flow start to separate from trailing edge. By increasing the angle of attack more, this separation area

If the boundary layer separates from the airfoil, does the lift coefficient increase or decrease? Why? Does the drag force increase or decrease? Why? - Quora

Airfoil incidence effect on flow separation: streamline contours

Airfoils, Venturis and Bernoulli's Principle: an Explanation

Evolutionary understanding of airfoil lift

Velocity Distributions

Paper Airfoil Aerodynamics

If flow separation occurs, does it always accompanies a wake region? I mean, behind the flow separation, does the region always have a wake region whose pressure is low? - Quora

Flow separation (boundary layer separation) - tec-science

Pressure Distribution on an Airfoil