CH 24.3 Solar Radiation, Pressure, & Wind. Earth’s Energy Balance Input = Sun’s Energy =...

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CH 24.3 Solar Radiation, Pressure, & Wind

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Transcript of CH 24.3 Solar Radiation, Pressure, & Wind. Earth’s Energy Balance Input = Sun’s Energy =...

Page 1: CH 24.3 Solar Radiation, Pressure, & Wind. Earth’s Energy Balance Input = Sun’s Energy = (Visible light + some UV) REFLECTED: ~ 25 % by clouds, dust,

CH 24.3 Solar Radiation, Pressure, & Wind

Page 2: CH 24.3 Solar Radiation, Pressure, & Wind. Earth’s Energy Balance Input = Sun’s Energy = (Visible light + some UV) REFLECTED: ~ 25 % by clouds, dust,

Earth’s Energy BalanceInput = Sun’s Energy = (Visible light + some UV)

REFLECTED:~ 25 % by clouds, dust, & gases~ 5 % by surfaces

ABSORBED:~ 20 % by clouds, dust, & gases~50% by surfaces

Surfaces Matter!

Albedo = measure of how much solar energy a surface reflects. Ice caps and clouds have a high albedo.

Positive feedback loops: More ice caps --> more solar energy reflected --> cooler --> more ice caps

Big Idea:Most air is NOT heated by the sun directly.

Page 3: CH 24.3 Solar Radiation, Pressure, & Wind. Earth’s Energy Balance Input = Sun’s Energy = (Visible light + some UV) REFLECTED: ~ 25 % by clouds, dust,

http://www.the-m-factory.com/portfolio/all_images/ill_maps-Albedo-Effect.jpg

Ch. 24.3: Albedo ValuesSurfaces Matter to Earth’s Energy Balance

Question: As icecaps melt, how will Earth’s albedo change? How will this affect climate?

Why?

Page 4: CH 24.3 Solar Radiation, Pressure, & Wind. Earth’s Energy Balance Input = Sun’s Energy = (Visible light + some UV) REFLECTED: ~ 25 % by clouds, dust,

Earth’s Energy BalanceOutput = Energy Reflected from Earth back to space (Usually Infrared - longer wavelength)

Greenhouse Gases:

CO2, CH4, H2O

Allow Visible light & UV to pass through, but Reradiates I.R. back to surface instead of letting it escape into space.

More GHG = more I.R. = Warming Temps.

Surfaces reradiate the solar energy that was absorbed by releasing longer wavelengths of I.R. (heat)

Most of this I.R. escapes into outer space.

Big Idea:The amount of reflective surfaces and the amount of GHG can have a big impact on TEMPS.

Page 5: CH 24.3 Solar Radiation, Pressure, & Wind. Earth’s Energy Balance Input = Sun’s Energy = (Visible light + some UV) REFLECTED: ~ 25 % by clouds, dust,

Feedback LoopsPositive Feedback: a change causes a process to continue (amplify response)

Negative Feedback: a change causes a process to stop (supression)

A. Warming temperatures cause ice caps to melt. Discuss how this is a “feedback loop”

B. Discuss how Snowball Earth came about through positive feedback

Page 6: CH 24.3 Solar Radiation, Pressure, & Wind. Earth’s Energy Balance Input = Sun’s Energy = (Visible light + some UV) REFLECTED: ~ 25 % by clouds, dust,

FEEDBACK = PROCESS THAT AMPLIFIES OR SUPPRESSES SOME INITIAL CHANGE.Examples: Positive FeedbackIce melts Less energy reflected/more absorbed E. warms ice melts

Page 7: CH 24.3 Solar Radiation, Pressure, & Wind. Earth’s Energy Balance Input = Sun’s Energy = (Visible light + some UV) REFLECTED: ~ 25 % by clouds, dust,

Ch. 24.3 Energy Transfer in the Atmosphere1. Radiation: Energy travels as a wave on

the EMS.• UV & Vis. Light from sun absorbed by

surfaces• Infrared (IR) waves are radiated from

surfaces & heat air 2. Conduction: Heat energy is transferred by molecule collisions w/in a few feet of E’s surface. Requires contact b/w molecules.3. Convection: Air masses transfer heat by moving. Warm, less dense air masses rise; Cooler & denser air masses sink ... Convection Current or Cells. VERY IMPORTANT TO WEATHER & CLIMATE.

Page 8: CH 24.3 Solar Radiation, Pressure, & Wind. Earth’s Energy Balance Input = Sun’s Energy = (Visible light + some UV) REFLECTED: ~ 25 % by clouds, dust,

Heat Transfer

Page 9: CH 24.3 Solar Radiation, Pressure, & Wind. Earth’s Energy Balance Input = Sun’s Energy = (Visible light + some UV) REFLECTED: ~ 25 % by clouds, dust,

The Sun and the Solar System Chapter 26. 24.3 Sun’s Size, Heat and Structure Diameter= 1,400,000 km or 868,000 miles –More than 3x the distance of Earth.

The Sun and the Solar System Chapter 26. 24.3 Sun’s Size, Heat and Structure Diameter= 1,400,000 km or 868,000 miles –More than 3x the distance of Earth.

Energy and Energy Transfer How the earth captures the sun’s energy and uses it to “do work”

Energy and Energy Transfer How the earth captures the sun’s energy and uses it to “do work”

Solar Energy We can use the sun’s energy every day.

Solar Energy We can use the sun’s energy every day.

The Sun’s Energy Read each slide. Look closely at each picture. Answer each question.

The Sun’s Energy Read each slide. Look closely at each picture. Answer each question.

Energy Transfer In Plants Changing the Sun’s Energy Into Useable, Stored Energy.

Energy Transfer In Plants Changing the Sun’s Energy Into Useable, Stored Energy.

UCSD Physics 10 Nuclear Energy Fission, Fusion, the Sun’s Energy.

UCSD Physics 10 Nuclear Energy Fission, Fusion, the Sun’s Energy.

Brain v.24.3 copy.pdf

Brain v.24.3 copy.pdf

I.The Solar Spectrum : Sun’s composition and surface temperature II.Sun’s Interior: Energy source, energy transport, structure, helioseismology. III.Sun’s.

I.The Solar Spectrum : Sun’s composition and surface temperature II.Sun’s Interior: Energy source, energy transport, structure, helioseismology. III.Sun’s.

24.3 power point

24.3 power point

Sun’s Energy Quick Review. Radiation that bounces off a surface is 1. reflected energy 2. transmitted energy 3. emitted energy 4. absorbed energy.

Sun’s Energy Quick Review. Radiation that bounces off a surface is 1. reflected energy 2. transmitted energy 3. emitted energy 4. absorbed energy.

Energy transfer between trophic levels. How much of the Sun’s energy is actually converted to organic matter? Why?

Energy transfer between trophic levels. How much of the Sun’s energy is actually converted to organic matter? Why?

Recognize the connection between the sun’s energy and the ...

Recognize the connection between the sun’s energy and the ...

16. Our Star, the Sun Sun data Hydrogen fusion produces the Sun’s energy Sun’s energy moves from core to surface Sunquakes give information about the interior.

16. Our Star, the Sun Sun data Hydrogen fusion produces the Sun’s energy Sun’s energy moves from core to surface Sunquakes give information about the interior.

Weather and Climate- Day 2 The Sun’s Energy Ch. 17.

Weather and Climate- Day 2 The Sun’s Energy Ch. 17.

Section 9.2 Photosynthesis: Trapping the Sun’s Energy p. 225 - 230.

Section 9.2 Photosynthesis: Trapping the Sun’s Energy p. 225 - 230.

© 2010 Pearson Education, Inc. Our goals for learning: Why was the Sun’s energy source a major mystery? Why does the Sun shine? What is the Sun’s.

© 2010 Pearson Education, Inc. Our goals for learning: Why was the Sun’s energy source a major mystery? Why does the Sun shine? What is the Sun’s.

The Sun Section 1 Section 1: Structure of the Sun Preview Key Ideas The Sun’s Energy Nuclear Fusion Mass Changing into Energy The Sun’s Interior The Sun’s.

The Sun Section 1 Section 1: Structure of the Sun Preview Key Ideas The Sun’s Energy Nuclear Fusion Mass Changing into Energy The Sun’s Interior The Sun’s.

A. Autotrophs - use sun’s energy directly (plants) B. Heterotrophs - obtain energy by the foods they eat. (animals)

A. Autotrophs - use sun’s energy directly (plants) B. Heterotrophs - obtain energy by the foods they eat. (animals)

24.3 Industrialization Spreads

24.3 Industrialization Spreads

The Sun Our Nearest Star. The Source of the Sun’s Energy The Source of the Sun’s Energy Fusion of light elements into heavier elements. Hydrogen converts.

The Sun Our Nearest Star. The Source of the Sun’s Energy The Source of the Sun’s Energy Fusion of light elements into heavier elements. Hydrogen converts.