Earth 120, Week 4 Note - Earth's Atmosphere
Earth 120, Week 4 Note - Earth's Atmosphere ERTH 120
Santa Ana College
Popular in Phys Earth/Space Systems
Popular in Earth Science
This 2 page Class Notes was uploaded by alicekhanh on Friday April 1, 2016. The Class Notes belongs to ERTH 120 at Santa Ana College taught by Joanna Fantozzi in Spring 2016. Since its upload, it has received 34 views. For similar materials see Phys Earth/Space Systems in Earth Science at Santa Ana College.
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Date Created: 04/01/16
Chapter 16 + 18: Earth’s Atmosphere 1. Atmospheric Heating - Several factors control Earth’s temperature patterns: Latitude Albedo Altitude Differential heating of land and water Land warms and cools rapidly compared to the ocean Land experiences a larger temperature range Cloud cover Daytime clouds reduce temperature by reflecting light Night clouds increase temperature by trapping heat 2. Atmospheric Pressure - Pressure differences are generated by the unequal heating of the Earth’s surface by solar radiation - Pressure is exerted on all surfaces in contact with air, but air pressure decreases with altitude (height above Earth’s surface) - Pressure is measured using a barometer 3. Atmospheric Circulation - Pressure differences lead to the formation of wind PressureGradient Force Coriolis Effect Friction - There are three main factors that affect wind: PressureGradient Force air flows from higher to lower pressure Coriolis Effect deflection in the direction due to Earth’s rotation Friction wind slows down as it passes over Earth’s surface - These factors create global surface winds: Northeast Trades blow in the Northern Hemisphere Southeast Trades blow in the Southern Hemisphere Westerlies blow in subtropics to high latitudes Easterlies blow in high latitudes