Earth’s Energy Earth’s Energy Exchange Exchange GPH 111
Earth’s Energy Exchange GPH 111. Insolation at Earth’s Surface Average annual solar radiation receipt on a horizontal surface at ground level in watts.
Dec 16, 2015
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Earth’s Energy Exchange Earth’s Energy Exchange Earth’s Energy Exchange Earth’s Energy Exchange
GPH 111GPH 111
Insolation at Earth’s Insolation at Earth’s SurfaceSurface
Insolation at Earth’s Insolation at Earth’s SurfaceSurface
Average annual solar radiation receipt on a horizontal surface at ground level in watts per square meter (100 W/m2 = 75 kcal/cm2/yr)
What happens What happens to incoming to incoming
sunlight?sunlight?
What happens What happens to incoming to incoming
sunlight?sunlight?
Can get:Scattered (Raleigh and Mie Scattering)RefractedReflected (Albedo)Absorbed
Raleigh and Mie Raleigh and Mie Scattering…Scattering…
Raleigh and Mie Raleigh and Mie Scattering…Scattering…
Blue Skies caused by Raleigh Scattering, where shorter wavelengths of visible light are scattered by molecules 1/10 the wavelength of light
White Glare caused by forward Mie scattering from particulates in the air
Refracted Sunlight…Refracted Sunlight…Refracted Sunlight…Refracted Sunlight…
Rainbows and strange sunsets are caused by refraction, where light slows and alters direction when passing through denser materials
Reflection and Albedo…Reflection and Albedo…Reflection and Albedo…Reflection and Albedo…
Albedo - is a measure of reflectivity of a surface or body
Absorbed Sunlight…Absorbed Sunlight…Absorbed Sunlight…Absorbed Sunlight…
Bad Water, Death ValleyBad Water, Death ValleyThe lowest and hottest place in North America, this place absorbs mucho solar energy.
Once energy is absorbed, Once energy is absorbed, what happens next…what happens next…
Once energy is absorbed, Once energy is absorbed, what happens next…what happens next…
Radiation - The emission and
propagation of heat. Conduction - Transmission of
heat through a medium.
Convection - Heat transfer in a gas or liquid by the circulation of currents from one region to
another. Latent Heat - The quantity of
heat absorbed or released by a substance undergoing a change of state.
Radiation - The emission and
propagation of heat. Conduction - Transmission of
heat through a medium.
Convection - Heat transfer in a gas or liquid by the circulation of currents from one region to
another. Latent Heat - The quantity of
heat absorbed or released by a substance undergoing a change of state. Also known as heat energy transfer
processes…Also known as heat energy transfer
processes…
Insolation and Heat FlowInsolation and Heat FlowInsolation and Heat FlowInsolation and Heat Flow
Greenhouse Effect and Greenhouse Effect and Clouds…Clouds…
Greenhouse Effect and Greenhouse Effect and Clouds…Clouds…
What effect will clouds have on surface temperature both day and night?
How How does does
Global Global Warming Warming
work?work?
How How does does
Global Global Warming Warming
work?work?
Global Warming and Our Global Warming and Our Future…Future…
Global Warming and Our Global Warming and Our Future…Future…
What are some negatives from Global Warming?
Any positives from Global Warming?
Things to know: Things to know: Where is solar energy most concentrated on the planet’s surface? Where the least?How does Raleigh Scattering generate blue skies? How does Mie Scattering generate white glare in the sky?How do rainbows form?What is albedo?The four ways absorbed solar energy is transferred on earth’s surface (actually 3, don’t worry about latent heat)The greenhouse effect / global warming and how clouds and CO2 play a role
Help: Chapter ER
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