Meteorology:

Meteorology Unit 8 Study Guide

☀ S6E4.b – Energy from the Sun & Heat Transfer

  • The sun heats land, water, and air at different rates

  • This uneven heating causes temperature differences, which drive weather patterns

    Atmosphere Layers: (Quiz 1)

    Troposphere – Lowest layer; where weather happens and where we live (up to ~8–15 km).

  • Stratosphere – Contains the ozone layer; temperature increases with height (~15–50 km).

  • Mesosphere – Coldest layer; meteors burn up here (~50–85 km).

  • Thermosphere – Very thin air; auroras occur here (~85–600 km).

  • Exosphere – Outermost layer; gradually fades into space (above ~600 km).


🌍 Climate vs. Weather

Climate

  • Long-term average weather (30+ years)

  • Helps predict what to expect

Factors that affect climate:

  1. Latitude – closer to equator = warmer

  2. Air Masses – carry temperature & moisture

  3. Elevation – higher = colder

  4. Proximity to Water – moderates temperature

  5. Landforms – affect precipitation (rain shadows)

Weather

  • Short-term atmospheric conditions

  • Includes:

    • Temperature

    • Precipitation

    • Air pressure

    • Cloud cover

🌡 Temperature Differences & Air Movement

  • Warm air = less dense → rises

  • Cool air = more dense → sinks

  • This movement creates wind and weather patterns

📝 Climate vs Weather Examples

  • What you expect → Climate

  • What you get → Weather

  • What you see outside → Weather

  • Planning clothes for a trip → Climate

  • Bringing umbrella today → Weather

🌬 S6E4.d – Air Masses & Fronts (Quiz 2)

Air Mass

  • Large body of air with same:

    • Temperature

    • Humidity

    • Pressure

Types of Air Masses

  • Maritime → over water → humid

  • Continental → over land → dry

  • Tropical → warm

  • Polar/Arctic → cold

Air Front

  • Boundary where two air masses meet and don’t mix

Types of Fronts

Cold Front

  • Cold air pushes under warm air

  • 🌩 Thunderstorms, heavy rain

Warm Front

  • Warm air rises over cold air

  • 🌧 Light rain, cloudy

Stationary Front

  • Neither air mass moves

  • 🌫 Days of clouds & rain

Occluded Front

  • Cold air traps warm air between two cool masses

  • 🌨 Cloudy, rainy, or snowy

⛈ S6E4.d & e – Severe Weather

Storm

  • Violent disturbance caused by pressure changes

🌩 Thunderstorms

Requirements:

  • Moisture

  • Unstable air

  • Lift

Key Facts:

  • Occur mostly in spring & summer

  • Form tall clouds called thunderheads

Lightning

  • Caused by buildup of electrical charges

Thunder

  • Caused by rapid expansion of heated air

🌪 Tornadoes

  • Funnel-shaped, rotating column of air

  • Forms from thunderstorms

Formation:

  • Warm air rises, cool air sinks → creates rotation

When:

  • Spring & early summer

Scale:

  • Enhanced Fujita Scale (EF0–EF5)

🌀 Hurricanes

  • Large tropical storms with winds ≥119 km/h (74 mph)

Formation:

  • Warm ocean water fuels storm

  • Air rises → low pressure → winds spiral inward

Season:

  • Late summer → early fall

Eye of the Storm:

  • Calm center surrounded by intense winds

Over Land:

  • Weakens (loses energy source)

Storm Surge:

  • Ocean water rises up to 6 meters

Scale:

  • Saffir-Simpson Scale (Category 1–5)

🌪🌩🌀 Storm Comparison

Feature

Thunderstorm

Tornado

Hurricane

Size

Small

Very small

Very large

Duration

~30 min

~10 min

Days–weeks

Location

Worldwide

Worldwide

Oceans

Season

Spring/Summer

Spring/Fall

June–Nov

Hazards

Lightning, hail

Flying debris

Flooding, surge

Scale

None

EF Scale

Saffir-Simpson

⚡ Key Things to Remember

  • Uneven heating → drives weather

  • Warm air rises, cool air sinks

  • Air masses determine weather conditions

  • Fronts = where weather changes happen

  • Most severe weather starts with thunderstorms

(Quiz 1)

What Are Greenhouse Gases?

Greenhouse gases (GHGs) are gases in Earth’s atmosphere that trap heat. They let sunlight in, but absorb and re-radiate heat, warming the planet. This process is called the Greenhouse Effect.

Main Greenhouse Gases

Know these core ones:

  • Carbon Dioxide (CO₂)

    • Comes from burning fossil fuels, deforestation

    • Biggest contributor to human-caused warming

  • Methane (CH₄)

    • Released from livestock, landfills, natural gas leaks

    • Much stronger than CO₂ in the short term

  • Nitrous Oxide (N₂O)

    • From fertilizers, agriculture, combustion

    • Long-lasting and powerful

  • Water Vapor (H₂O)

    • Most abundant greenhouse gas

    • Amplifies warming but not directly controlled by humans

  • Fluorinated gases (F-gases)

    • Man-made (refrigerants, industrial processes)

    • Extremely potent but less common

How the Greenhouse Effect Works

  1. Sunlight enters Earth’s atmosphere

  2. Earth absorbs energy and warms up

  3. Earth releases heat (infrared radiation)

  4. Greenhouse gases trap some of this heat

  5. Planet stays warm enough to support life

Without this effect, Earth would be too cold to live on.

Natural vs Human Causes

  • Natural sources: volcanoes, respiration, decomposition

  • Human sources: burning fossil fuels, farming, deforestation, industry

Human activity has intensified the greenhouse effect, leading to Global Warming.

Why It Matters

Increased greenhouse gases lead to:

  • Rising global temperatures

  • Melting ice caps and glaciers

  • Sea level rise

  • More extreme weather

This broader impact is called Climate Change.

Key Terms to Remember

  • Carbon footprint: total emissions caused by a person/activity

  • Fossil fuels: coal, oil, natural gas

  • Renewable energy: solar, wind, hydro

  • Carbon cycle: movement of carbon through Earth systems

Quick Memory Tricks

  • CO₂ = biggest volume

  • CH₄ = strongest short-term

  • Humans = main cause of increase