METEOROLOGIST JEFF HABY
This air mass occurs in regions with large elevation changes over a short distance and is often in the interior
region of mountain ranges. It is not a source region for one particular type of air mass. Since highland climates
are in an elevated terrain, they can promote
dryness in the interior of the highland climate. When
air masses enter
a highland climate they modify due to these elevation changes. mP and mT air is dried (on lee-ward side) due to
orographic descent. Shallow cP air has difficulty entering a highland climate due to the high density of the cP air. Cold
dense air has difficulty moving over elevated terrain.
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