climate notes page 3 Sun's Energy & Climate Change

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Presentation transcript:

climate notes page 3 Sun's Energy & Climate Change ©Mark Place, 2007-2008 www.LearnEarthScience.com

According to the graph below, what wavelength of energy does the Earth Sun's Energy & Climate According to the graph below, what wavelength of energy does the Earth receive in the greatest intensity? visible light

which absorbs ultraviolet (UV) Sun's Energy & Climate Name the primary gas which absorbs ultraviolet (UV) from the sun. ozone - O3 Found in the stratosphere

Name the three primary gases which absorb infrared (IR) energy Sun's Energy & Climate Name the three primary gases which absorb infrared (IR) energy carbon dioxide methane water vapor

helps prevent cancer in humans. Sun's Energy & Climate Why is the ozone layer important? It protects crops and helps prevent cancer in humans.

Why is it warmer on a cloudy night than on a clear night? Sun's Energy & Climate Why is it warmer on a cloudy night than on a clear night? Clouds (H2O vapor) absorb IR energy radiated by the Earth and trap heat.

Explain the greenhouse effect. Include a diagram which shows the change in wavelength. Apply It

Climate Change

Ice Ages

what triggers an ice age Ice Ages Ice Ages are cyclic. The last one occurred ~12,000 years ago The exact causes of what triggers an ice age are not known http://www.museum.state.il.us/exhibits/ice_ages/

Ice core results from the Vostok drilling site in Antarctica Ice core results from the Vostok drilling site in Antarctica. The top plot in blue is carbon dioxide, the middle plot in red is paleotemperature, and the bottom plot in green is methane. Note how the two greenhouse gases increase with temperature

El Niño A warming of the Pacific Ocean. Winters: West = Stormy South = Cold, wet Northeast = warmer

A cooling of the Pacific Ocean. La Niña A cooling of the Pacific Ocean. Dry in southeast. Cool, wet in northwest. What are we now??

Average global temperatures are increasing. Glaciers are melting. Global Warming Average global temperatures are increasing. Glaciers are melting. Ocean levels are rising. Warming is natural. Humans have helped the process through increased levels of carbon dioxide (CO2)

Glacial Ice Core

Mountain Glaciers