Earth 120, Week 6 Note - Climate
Earth 120, Week 6 Note - Climate ERTH 120
Santa Ana College
Popular in Phys Earth/Space Systems
Popular in Earth Science
This 1 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 23 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 20: Climate 1. Introduction The Köppen classification system for climate is based on mean monthly and annual values of temperature and precipitation There are five principal climate groups: Humid tropical (A) Humid middlelatitude with mild winters (C) Humid middlelatitude with severe winters (D) Dry (B) Polar (E) 2. Climate Change Clues about our past climate can be found in both geological and historical records Several factors influence the climate Variations in Earth's orbit around the Sun affect the solar energy that reaches Earth’s surface Variations in greenhouse gases affect how much heat is trapped within the lower atmosphere Aerosols can cool the climate directly by reflecting sunlight back to space, and indirectly by making clouds brighter reflectors Climate change could affect the Earth in several different ways Sealevel rise may occur since: Melting of glaciers will add water to the ocean Warmer ocean water will experience thermal expansion Melting of sea ice and permafrost may accelerate climate change via a positive feedback mechanism (where the effects reinforce the initial change) Increased cloud cover may slow climate change via a negative feedback mechanism (where the effects offset the initial change) Climatologists try to predict how the temperature might change, but changes are not likely to happen as quickly as media suggests
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