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CHAPTER 16 WEATHER

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CHAPTER 16 WEATHER Weather- Present state of atmosphere 16.1 Factors - Temp, air pressure, wind - Water cycle- basis of weather Wind - Created from uneven heating – PowerPoint PPT presentation

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Title: CHAPTER 16 WEATHER


1
CHAPTER 16 WEATHER
  • Weather- Present state of atmosphere
  • 16.1 Factors
  • - Temp, air pressure, wind
  • - Water cycle- basis of weather
  • Wind
  • - Created from uneven heating
  • - Wind speed measured by anemometer

2
  • Humidity
  • - Amount of water vapor in air
  • Warm air holds more than cold
  • Relative Humidity
  • - Water vapor in air vs. how much air can hold
    at a certain temp.
  • Dew point
  • - Temp at which condensation takes place

3
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4
  • Cloud Formation
  • 1. Warm air rises expands
  • 2. Water vapor condenses around dust
  • 3. Droplets of water form clouds
  • Cloud Classification
  • - Shape height
  • Shape
  • .
  • 1. Stratus- Flat, gray, precipitation
  • 2. Cumulus- White, puffy, tall
  • 3. Cirrus- Feathery/fair weather
  • 4. Nimbus- Rain cloud

5
Stratus
6
Fog (Stratus)
7
Cumulus
8
Cumulonimbus
9
Cirrus
10
Nimbus
11
  • Height 1. Cirro High (18,000 feet) 2.
    Alto Middle (6,500 -18,000 feet) 3. Strato
    Low (Up to 6,500 feet)
  • 16.2 Weather Patterns
  • Fronts http//ww2010.atmos.uiuc.edu/(Gh)/guides
    /crclm/act/fpr.rxml
  • - Boundary between 2 different air masses
  • - Storms occur here

12
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13
  • Fronts
  • 1. Cold- Cold air pushes warm air up
  • 2. Warm- Warm air slides over cold
  • 3. Occluded- Warm air between cool
  • and cold air
  • 4. Stationary- Fronts stop moving

14
Cold Front
15
Warm Front
16
Occluded Front
17
Stationary Front
18
  • Severe Weather
  • Thunderstorms
  • - Warm, moist air rises rapidly cools
  • - Strong winds, thunder, lightning
  • Tornadoes
  • - Form along fronts
  • - Warm air rises up creates funnel
  • Hurricanes
  • - Forms over tropical oceans
  • - Heat energy from ocean turns to wind

19
  • 16.3 Forecasting Weather
  •  
  • Weather Info
  • 1. Station model http//weather.cod.edu/notes/
    stnmodel.html
  • 2. Isobar- Wind
  • 3. Isotherm- Temperature
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