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Earth 120, Week 6 Note - Climate

by: alicekhanh

Earth 120, Week 6 Note - Climate ERTH 120

Marketplace > Santa Ana College > Earth Science > ERTH 120 > Earth 120 Week 6 Note Climate
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About this Document

This note contains the summary of chapter 20 - Climate from the book "Earth Science" of Tarbuck
Phys Earth/Space Systems
Joanna Fantozzi
Class Notes
Earth Science
25 ?




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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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