Global Environmental Processes: Atmosphere and Climate System
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Questions and Answers

What is the primary direction of the pressure gradient force acting on the atmosphere?

  • Vertical only
  • From high to low pressure (correct)
  • Toward areas of increased friction
  • From low to high pressure
  • Which atmospheric force is most significant near the Earth's surface?

  • Tidal force
  • Coriolis force
  • Friction (correct)
  • Gravity
  • What primary phenomenon drives the Hadley cell circulation in the tropics?

  • Seasonal wind shifts
  • Uneven heating of the Earth's surface (correct)
  • Pressure gradients generated by ocean currents
  • Earth's rotation
  • How does the Coriolis effect influence wind patterns?

    <p>Deflects wind to the right in the northern hemisphere (D)</p> Signup and view all the answers

    What role does gravity play in atmospheric motion?

    <p>It acts downwards but does not affect horizontal motion (D)</p> Signup and view all the answers

    What is a characteristic of the tropical Hadley cell?

    <p>It is a circulation pattern that extends from the equator to about 30 degrees latitude. (B)</p> Signup and view all the answers

    Which process is primarily responsible for poleward energy transfer in the atmosphere?

    <p>Atmospheric sensible heat transfer is significant. (D)</p> Signup and view all the answers

    What major feature distinguishes mid-latitude circulation from other circulation patterns?

    <p>It involves large-scale weather patterns and systems. (B)</p> Signup and view all the answers

    Why do atmospheric circulation features vary by latitude?

    <p>The Earth's rotation influences circulation differently at various latitudes. (A)</p> Signup and view all the answers

    What is a key characteristic of the monsoon system?

    <p>It is a seasonal reversal of winds bringing heavy rainfall. (B)</p> Signup and view all the answers

    What causes the creation of a sea breeze during the day?

    <p>Heating of land leading to lower pressure (D)</p> Signup and view all the answers

    What does closely spaced isobars on a map indicate?

    <p>A strong pressure gradient force (C)</p> Signup and view all the answers

    How does the Coriolis effect impact winds in the Northern Hemisphere?

    <p>Winds are deflected to the right when moving northward (C)</p> Signup and view all the answers

    Why is the Coriolis effect larger at high latitudes?

    <p>The Earth's rotation has a greater impact (A)</p> Signup and view all the answers

    What is primarily responsible for seasonal monsoons?

    <p>Thermal circulation loops (A)</p> Signup and view all the answers

    Which statement about the pressure gradient force is correct?

    <p>It results from changes in atmospheric pressure (A)</p> Signup and view all the answers

    What phenomenon occurs when the Earth's rotation affects wind direction?

    <p>Coriolis effect (C)</p> Signup and view all the answers

    Which factor does NOT influence the Coriolis effect?

    <p>Air temperature (B)</p> Signup and view all the answers

    Flashcards

    Atmospheric Circulation

    The movement of air in a circular pattern, driven by temperature differences and the rotation of the Earth. It plays a significant role in global weather patterns.

    Hadley Cell

    A large-scale atmospheric circulation cell that dominates the tropics. It features warm, moist air rising near the equator, creating low pressure, and then descending at higher latitudes, resulting in high pressure.

    Mid-Latitude Circulation

    A complex circulation pattern found in middle latitudes (around 30-60 degrees). It involves warm air rising near the equator and cold air sinking near the poles.

    Monsoon System

    A seasonal wind system that reverses direction due to the differential heating of land and water. It brings heavy rainfall during the summer monsoon and dry conditions during the winter monsoon.

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    Poleward Energy Transfer

    The transfer of heat from warmer areas to cooler areas. It's a crucial process in maintaining the balance of Earth's energy budget.

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    Pressure Gradient Force

    The force that causes air to move from areas of high pressure to areas of low pressure.

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    Force in Meteorology

    An interaction that can cause an object to change velocity. In meteorology, it refers to forces acting on air masses and oceans.

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    Coriolis Force

    A force that acts perpendicular to the direction of motion. It is significant in large-scale atmospheric circulation, affecting wind direction.

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    Pressure Gradient

    A difference in pressure between two locations, causing air or water to move from high pressure to low pressure.

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    Sea Breeze

    A local wind system that blows from the sea towards the land during the day, driven by the difference in temperature between the land and the sea.

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    Isobars

    Lines on a weather map that connect points of equal atmospheric pressure.

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    Coriolis Effect

    The apparent deflection of moving objects (like winds) due to the rotation of the Earth. It occurs to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.

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    Coriolis Effect: Latitude Impact

    The Coriolis effect is stronger at higher latitudes (closer to the poles) than at lower latitudes.

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    Coriolis Effect: Wind Speed Impact

    The speed of the wind affects the strength of the Coriolis effect. Faster winds experience a greater deflection.

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    Global Wind Patterns

    The Earth's rotation, pressure differences, and the Coriolis effect all work together to create global wind patterns.

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    Study Notes

    Global Environmental Processes: Atmosphere and Climate System

    • Topics covered include forces acting on Earth's fluid bodies (atmosphere and ocean), tropical Hadley cell, mid-latitude circulation, monsoon systems, and latitudinal atmospheric circulation differences.

    Learning Outcomes

    • Students should be able to summarize forces acting on Earth's fluid bodies.
    • Students should be able to describe the major features of the tropical Hadley cell.
    • Students should be able to describe the major features of the mid-latitude circulation.
    • Students should be able to describe the major features of the monsoon system.
    • Students should be able to explain why Earth's atmospheric circulation differs by latitude.

    Latitudinal Differences

    • Earth receives uneven solar radiation.
    • This results in a net heat surplus at the equator and a net heat deficit at the poles.
    • The atmosphere and ocean transfer heat from the equator towards the poles.
    • This transfer is illustrated in a diagram showing net shortwave and net longwave radiation variations across latitudes.

    Energy Transfer

    • Ocean currents play a significant role in transferring heat poleward, especially at lower latitudes.
    • Atmospheric sensible heat transfer is important in mid-latitudes.
    • Latent heat transfer is more complex.
    • Heat transfer diagrams display this process.

    Dominant Circulation Patterns

    • Tropics: Featuring Hadley cell and monsoons.
    • Mid-latitudes: Characterized by cyclones, anti-cyclones, and sub-tropical jet streams.

    Forces

    • Gravity: Acts downwards, not involved in horizontal movement.
    • Pressure: Acts from high pressure to low pressure.
    • Friction: Acts against the direction of airflow, important near the surface.
    • Coriolis: A deflecting force, significant at higher latitudes, and proportional to wind speed and latitude.

    Pressure Gradient Force

    • Uneven heating of the surface causes a pressure gradient.

    • Heated air rises, creating low pressure; cooler air sinks, creating high pressure.

    • This pressure difference creates wind, flowing from high to low pressure.

    • This is illustrated through diagrammatic examples, such as the sea breeze.

    • Isobars: Lines of constant pressure on a weather map. Closely spaced isobars indicate a stronger pressure gradient force, resulting in faster winds.

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    Description

    This quiz covers the dynamics of Earth's atmosphere and climate systems, focusing on the forces that act on fluid bodies like the atmosphere and ocean. Students will learn about the tropical Hadley cell, mid-latitude circulation, and the impacts of solar radiation on latitudinal atmospheric differences.

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