Enhanced rainfall as a result of moist air cooling as it crosses a mountain range.
Occluded Front:
The combination of warm and cold fronts as a cold front overtakes a warm front. The front develops during the later stages of the life cycle of a frontal depression and is so called because of the associated occluding (shutting off) the warm air from the Earth's surface.
Ozone:
A form of oxygen which has three atoms instead of the usual two. In the troposphere, ozone is a pollutant. In the stratosphere, ozone filters out harmful ultraviolet radiation.
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Orographic Rainfall: