Analyze variables in the Base of Glacier topic of the Glacial Dynamics Simulation to determine how changes to the base of a glacier affect glacial flow velocities. To do this, select the slider on the Temperature bar to increase or decrease the basal water temperature; select the slider on the Rock/Glacier Contact bar to change the smoothness or roughness of the contact surface, and select the slider on the Slope Angle bar to change the slope from gentle to steep. Which conditions at the base of the glacier increase glacial flow velocity?