Climate drivers

Climate depends on how energy enters, moves through, and leaves Earth. Several controls interact, so latitude alone cannot explain every local climate.

Lesson 1 of 33 parts Practice Flashcards

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Solar angle and Albedo

Objective: Explain solar angle and albedo, distinguish their meanings, and apply them to a described case.

Solar angle: The angle of sunlight affects how incoming energy is distributed over a surface. Albedo: Albedo is the fraction of incoming radiation a surface reflects. Climate results from an energy budget and the transport of heat and moisture. Latitude changes sunlight geometry, but elevation, oceans, prevailing winds, and topography modify local patterns. Greenhouse gases interact with outgoing infrared radiation; reflected sunlight is a different part of the budget. Seasonal climate differences depend on changing sunlight distributions. Long-term orbital changes and present annual seasons operate on different timescales and should not be confused. Application: Low-angle sunlight spreads energy over a larger area. This most directly illustrates solar angle. Bright snow reflects more sunlight than dark soil. This most directly illustrates albedo.

Worked examples

Try itOriginal teaching scenario: Low-angle sunlight spreads energy over a larger area. Which idea from this section does it most directly illustrate?Show answer

Step 1 — Read the observation: Low-angle sunlight spreads energy over a larger area. Step 2 — Recall the relevant idea: The angle of sunlight affects how incoming energy is distributed over a surface. Step 3 — Connect the observation to the idea: The scenario is an illustration of solar angle. Step 4 — Check the limit: This short scenario illustrates the concept; it does not establish every detail or exclude every other influence in a real situation.

Try itOriginal teaching scenario: Bright snow reflects more sunlight than dark soil. Which idea from this section does it most directly illustrate?Show answer

Step 1 — Read the observation: Bright snow reflects more sunlight than dark soil. Step 2 — Recall the relevant idea: Albedo is the fraction of incoming radiation a surface reflects. Step 3 — Connect the observation to the idea: The scenario is an illustration of albedo. Step 4 — Check the limit: This short scenario illustrates the concept; it does not establish every detail or exclude every other influence in a real situation.

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Solar angle and Albedo

Objective: Explain solar angle and albedo, distinguish their meanings, and apply them to a described case.

Worked examples

Try itOriginal teaching scenario: Low-angle sunlight spreads energy over a larger area. Which idea from this section does it most directly illustrate?Show answer

Try itOriginal teaching scenario: Bright snow reflects more sunlight than dark soil. Which idea from this section does it most directly illustrate?Show answer

Greenhouse effect and Ocean influence

Objective: Explain greenhouse effect and ocean influence, distinguish their meanings, and apply them to a described case.

Greenhouse effect: Greenhouse gases absorb and emit infrared radiation, influencing surface and lower-atmosphere temperature. Ocean influence: Ocean heat storage and transport affect regional temperature and moisture patterns. Climate results from an energy budget and the transport of heat and moisture. Latitude changes sunlight geometry, but elevation, oceans, prevailing winds, and topography modify local patterns. Greenhouse gases interact with outgoing infrared radiation; reflected sunlight is a different part of the budget. Seasonal climate differences depend on changing sunlight distributions. Long-term orbital changes and present annual seasons operate on different timescales and should not be confused. Application: Atmospheric carbon dioxide interacts with outgoing infrared radiation. This most directly illustrates greenhouse effect. A coastal location has smaller seasonal temperature swings than an inland location. This most directly illustrates ocean influence.

Worked examples

Try itOriginal teaching scenario: Atmospheric carbon dioxide interacts with outgoing infrared radiation. Which idea from this section does it most directly illustrate?Show answer

Step 1 — Read the observation: Atmospheric carbon dioxide interacts with outgoing infrared radiation. Step 2 — Recall the relevant idea: Greenhouse gases absorb and emit infrared radiation, influencing surface and lower-atmosphere temperature. Step 3 — Connect the observation to the idea: The scenario is an illustration of greenhouse effect. Step 4 — Check the limit: This short scenario illustrates the concept; it does not establish every detail or exclude every other influence in a real situation.

Try itOriginal teaching scenario: A coastal location has smaller seasonal temperature swings than an inland location. Which idea from this section does it most directly illustrate?Show answer

Step 1 — Read the observation: A coastal location has smaller seasonal temperature swings than an inland location. Step 2 — Recall the relevant idea: Ocean heat storage and transport affect regional temperature and moisture patterns. Step 3 — Connect the observation to the idea: The scenario is an illustration of ocean influence. Step 4 — Check the limit: This short scenario illustrates the concept; it does not establish every detail or exclude every other influence in a real situation.

Elevation influence and Orbital variation

Objective: Explain elevation influence and orbital variation, distinguish their meanings, and apply them to a described case.

Elevation influence: Elevation affects air pressure and often temperature, interacting with regional conditions. Orbital variation: Changes in Earth's orbit and orientation alter the distribution of sunlight over long timescales. Climate results from an energy budget and the transport of heat and moisture. Latitude changes sunlight geometry, but elevation, oceans, prevailing winds, and topography modify local patterns. Greenhouse gases interact with outgoing infrared radiation; reflected sunlight is a different part of the budget. Seasonal climate differences depend on changing sunlight distributions. Long-term orbital changes and present annual seasons operate on different timescales and should not be confused. Application: A high mountain is cooler than a nearby lowland site. This most directly illustrates elevation influence. A climate reconstruction examines changing seasonal sunlight patterns. This most directly illustrates orbital variation.

Worked examples

Try itOriginal teaching scenario: A high mountain is cooler than a nearby lowland site. Which idea from this section does it most directly illustrate?Show answer

Step 1 — Read the observation: A high mountain is cooler than a nearby lowland site. Step 2 — Recall the relevant idea: Elevation affects air pressure and often temperature, interacting with regional conditions. Step 3 — Connect the observation to the idea: The scenario is an illustration of elevation influence. Step 4 — Check the limit: This short scenario illustrates the concept; it does not establish every detail or exclude every other influence in a real situation.

Try itOriginal teaching scenario: A climate reconstruction examines changing seasonal sunlight patterns. Which idea from this section does it most directly illustrate?Show answer

Step 1 — Read the observation: A climate reconstruction examines changing seasonal sunlight patterns. Step 2 — Recall the relevant idea: Changes in Earth's orbit and orientation alter the distribution of sunlight over long timescales. Step 3 — Connect the observation to the idea: The scenario is an illustration of orbital variation. Step 4 — Check the limit: This short scenario illustrates the concept; it does not establish every detail or exclude every other influence in a real situation.

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