GEOG220 Lecture Notes - Lecture 17: Dew Point
18 Apr 2016
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Document Summary
The air will come back down in the leeward side of the mountain and heat back up past its dew point. This leads to windward sides having lush, damp environments and the leeward sides having dry, lifeless climates. There will be upward motion in low pressure areas that force air upwards to create weather. Condensation nuclei must grow by a factor or 100 to become a typical rain drop they may come together in 2 ways. Determining the velocity of a water droplet requires mass (larger raindrops are more massive). A pure water droplet won t freeze until temperatures hit -40 c. this is because of a lack of freezing nuclei present in the clouds. Ice crystals have a smaller evaporation rate than a cloud droplet. Thus, ice crystals will grow faster than cloud droplets in clouds that contain both. The ice crystal (bergeron-findeisen) process is the major method of precipitation in middle and high altitudes.
