Higher heights means warmer air.

A blocking high will begin to move when the upper level ridge begins to weaken from a jet max either exiting the apex of the ridge which helps to reduce the amplitude of the ridge by decreasing boundary layer convergence.

The iliac crest.

The phitrum ridge is the indentation or groove that runs vertically between the nose and upper lip. Its function is primarily aesthetic and individual variations in the phitrum ridge contribute to facial appearance.

The highest peaks of the ridge average about 2500 meters below sea level (2.5 kilometers), while Iceland is part of the ridge above sea level. Parts of the ridge are more than 4000 meters below MSL.