Atmosphere and Ocean exam review

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Questions and Answers

Which of the following best describes the primary cause of Earth's seasons?

  • The varying speeds at which Earth orbits the Sun during different times of the year.
  • Variations in solar energy output throughout the year.
  • The tilt of Earth's axis of rotation relative to its orbital plane. (correct)
  • Changes in Earth's distance from the Sun due to its elliptical orbit.

Which of the following processes is an example of a positive feedback loop related to Earth's heat budget?

  • The increase in vegetation cover that absorbs more carbon dioxide.
  • The melting of ice and snow, leading to decreased albedo and increased absorption of solar radiation. (correct)
  • The formation of clouds that reflect incoming solar radiation.
  • The evaporation of water, leading to increased humidity and cloud formation.

What are the two most abundant gases in Earth's atmosphere?

  • Oxygen and Carbon Dioxide
  • Nitrogen and Oxygen (correct)
  • Argon and Carbon Dioxide
  • Hydrogen and Helium

How does increasing air density typically affect air pressure?

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

Which of the following is the primary difference between weather and climate?

<p>Climate is the average of weather patterns over a long period, while weather is the state of the atmosphere at a specific time and place. (B)</p> Signup and view all the answers

How does the Coriolis effect influence the direction of winds in the Northern Hemisphere?

<p>Deflects winds to the right (A)</p> Signup and view all the answers

Which of the following statements best describes the typical wind patterns associated with high-pressure systems?

<p>Air diverges at the surface, causing sinking motion and clear skies. (B)</p> Signup and view all the answers

During the day, coastal areas often experience a sea breeze. What is the primary reason for this phenomenon?

<p>The land heats up faster than the ocean. (D)</p> Signup and view all the answers

Which of the following is a typical consequence of El Niño?

<p>Warmer than average sea surface temperatures in the central and eastern Pacific Ocean. (D)</p> Signup and view all the answers

What is the thermocline?

<p>A zone of rapid temperature change with depth. (A)</p> Signup and view all the answers

Which factor primarily drives surface ocean currents?

<p>Wind (D)</p> Signup and view all the answers

As a wave approaches the shore and begins to break, what happens to its wavelength and height?

<p>Wavelength decreases, height increases (D)</p> Signup and view all the answers

In deep-water waves, what is the relationship between wave speed, wavelength, and period?

<p>Wave speed increases as wavelength increases (D)</p> Signup and view all the answers

What is the primary generating force for most waves?

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

How do shallow water waves differ from deep water waves?

<p>The speed of shallow-water waves is determined by water depth. (A)</p> Signup and view all the answers

What is the main cause of tides on Earth?

<p>The gravitational pull of the Sun and Moon (B)</p> Signup and view all the answers

During which phase of the moon are spring tides most pronounced?

<p>Full moon or New moon (D)</p> Signup and view all the answers

How do lunar tides differ from solar tides in terms of their influence on Earth's oceans?

<p>Lunar tides have a stronger influence due to the Moon's closer proximity. (C)</p> Signup and view all the answers

What is the typical pattern of a semidiurnal tide?

<p>Two high tides and two low tides of approximately equal height per day. (A)</p> Signup and view all the answers

Why is the Moon's tide-generating force greater than the Sun's, despite the Sun's much larger mass?

<p>The Moon is much closer to the Earth than the Sun is. (A)</p> Signup and view all the answers

Flashcards

Latitude of Direct Sunlight

The latitude where the sun's rays hit the Earth most directly, varying throughout the year due to Earth's tilt.

Ice-Albedo Feedback Loop

A feedback loop where melting ice reduces Earth's reflectivity (albedo), leading to more solar energy absorption and further warming.

Forces of Heat Distribution

Solar radiation and gravity drive heat distribution. Wind transports heat from areas with more radiation to areas with less.

Gases in the Atmosphere

Nitrogen (N2) at approximately 78% and Oxygen (O2) at about 21%.

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Factors Affecting Air Density

Temperature, humidity, air pressure, and altitude.

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Coriolis Force

The force caused by Earth's rotation that deflects moving objects (like wind and currents) to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.

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Prevailing Wind Patterns

Global patterns of air movement are influenced by high and low pressure areas, creating three main cell types: Hadley, Ferrel, and Polar cells.

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Wind Rotation

In the Northern Hemisphere, wind rotates clockwise around high-pressure systems and counterclockwise around low-pressure systems; the opposite occurs in the Southern Hemisphere.

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Heat Distribution on Earth

Heat is distributed through the atmosphere and oceans from the equator toward the poles.

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Direction of Winds

Winds are caused by differences in air pressure, and direction is determined by the pressure gradient force and the Coriolis effect.

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Major Wind Bands

Trade Winds (0-30°), Westerlies (30-60°), and Polar Easterlies (60-90°).

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Monsoons

Areas around the equator experience monsoons due to differential heating of land and water, causing wind direction to change seasonally.

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El Nino/La Nina

El Nino is when trade winds weaken or reverse, causing warm water to accumulate in the eastern Pacific, while La Nina strengthens the trade winds, bringing cooler water to the surface of the Pacific.

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Thermocline and Halocline

The thermocline is a zone of rapid temperature change, and the halocline is a zone of rapid salinity change with depth.

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Surface Current Gyres

Surface current gyres are large circular patterns formed by wind and the Coriolis effect. They form due to winds and continents.

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Wave Formation Process

Wind, generating and restoring forces.

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Wave Characteristics

Wavelength is the distance between crests, period is the time between waves, frequency is waves per time, steepness if the height to the distance ratio.

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Breaking Wave

Wave height to water ratio is greater than 1:7

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Tide Wave Parts

Crests are high points, troughs are low points

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Lunar vs Solar Tides

Lunar tides are caused by the moon, and solar tides are caused by the sun. They are different distances away.

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Study Notes

  • Exam 2 reviews chapters 6, 7, 8, and 9

Chapter 6: Atmosphere and Oceans

  • Solar radiation input varies with seasons; the sun's rays are most direct at specific latitudes depending on the season.
  • The ice-albedo positive feedback loop relates to the Earth's heat budget.
  • The primary forces governing heat distribution on Earth should be named.
  • Atmospheric composition mainly consists of two gases, and their percentages should be known.
  • Factors affecting air density are important to describe.
  • Weather and climate should be compared and contrasted.
  • The Coriolis force requires explanation.
  • Earth's prevailing wind patterns are determined by high and low pressure areas, as well as the three cell types in each hemisphere
  • Wind rotation around high and low pressure systems differs in the Northern and Southern hemispheres.
  • Heat distribution on Earth's surface needs a description and explanation.
  • Winds exist, and their direction is determined by specific factors
  • Major wind bands need to be matched with their latitudes.
  • The names and directions of the major wind bands on Earth should to be known.
  • The ice/albedo feedback loop requires a description.
  • Coastal wind patterns vary between day and night, which is related to monsoons in India
  • Causes and consequences of El Nino/La Nina are significant phenomena

Chapter 7: Ocean Structure and Circulation

  • Temperature and salinity plotted against depth help identify the thermocline and halocline.
  • Seasonal thermocline changes at mid-latitudes throughout the should be sketched with mixed layer depths for each season.
  • Four different water masses and their formation processes/locations should be listed and described.
  • The formation of surface current gyres should be understood and explained.
  • Major currents in each gyre should be known.
  • Wind-driven currents within each gyre should be identified.
  • Major water masses relative to each other with depth across the Atlantic Ocean should be sketched
  • The Great Ocean Conveyor Belt should be sketched.

Chapter 8: Waves

  • Wave formation involves generating and restoring forces.
  • Basic wave characteristics include the wave crest, trough, height, and wavelength.
  • Wavelength, wave period, wave frequency, and steepness are key wave definitions
  • Wave breaking points can be determined
  • Wave dispersion occurs with distance from a storm
  • Wave size is affected by certain factors
  • Shallow and deep water waves should be compared.
  • Wave interactions are important
  • A tsunami should be described.

Chapter 9: Tides

  • Tides are waves with identifiable crests, troughs, wavelength, wave height, amplitude, and period.
  • Lunar and solar tides should be compared.
  • Wave velocity varies at each phase of the tide.
  • Diurnal, semidiurnal, and mixed semidiurnal tides should be compared.
  • Basic characteristics of the three tidal patterns should be labeled.
  • High tide times can be calculated for diurnal and semidiurnal tides given the last high tide.
  • The Moon's tide-generating force is greater than the Sun's despite the Sun's mass and gravitational attraction
  • The Earth-Moon-Sun system alignment can be diagrammed during spring and neap tides
  • Solar and lunar tides interact during spring and neap tides.

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