SC BIOL 301 - Final Exam Study Guide (11 pages)

Previewing pages 1, 2, 3, 4 of 11 page document View the full content.
View Full Document

Final Exam Study Guide



Previewing pages 1, 2, 3, 4 of actual document.

View the full content.
View Full Document
View Full Document

Final Exam Study Guide

516 views

Global Ecology, Climates, Biomes, Ecosystems, Communities


Pages:
11
Type:
Study Guide
School:
University Of South Carolina-Columbia
Course:
Biol 301 - Ecology and Evolution
Edition:
1

Unformatted text preview:

Biol 301 1nd Edition Exam 4 Study Guide Lectures 17 20 Lecture 17 Greenhouse Effect the process of solar radiation striking Earth being converted to infrared radiation and being absorbed and re emitted by atmospheric gases Greenhouse Gases Greenhouse gases are those that absorb and re emit infrared radiation and contribute to the greenhouse effect These gases comprise only a small fraction of the atmosphere Natural Effects H2O and CO2 are the two most prevalent greenhouse gases derived from the transpiration of plants decomposition respiration and volcanic eruptions Other gases such as nitrous oxide N2O methane CH4 and ozone O3 are naturally derived and contribute to the greenhouse effect The naturally occurring greenhouse effect is beneficial to organisms Human Effects The concentration of CO2 has increased over the past two centuries due to combustion of fossil fuels Agriculture landfills and fossil fuel combustion have also increased concentrations of CH4 and N2O Humans have produced unnatural gases e g chlorofluorocarbons that exist at low concentrations but absorb relatively more infrared radiation and persist in the atmosphere for hundreds of years Increases in greenhouse gases could cause an increase in the average temperature of Earth Some regions may become cooler some regions may become up to 4 C warmer Unequal heating Differences in temperature around the globe are the result of how much solar radiation strikes Earth at a given location o Sunlight intensity The distance travelled through the atmosphere is shorter at the equator than at the poles so less solar energy is removed by the atmosphere and more strikes the ground The Sun s rays strike the poles at an angle spreading radiation over a much larger area than at the equator Hence Earth s surface at the equator receives more direct and more intense sunlight o Albedo the fraction of solar energy reflected by an object Some surfaces have higher albedo than others light colored surfaces reflect more light



View Full Document

Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Final Exam Study Guide and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Final Exam Study Guide and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?