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0003 Atmosphere, climate and weather: 1. identify the basic composition, structure, and properties of the atmosphere.

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0003 Atmosphere, climate and weather: 1. identify the basic composition, structure, and properties of the atmosphere. Chemical Composition of the Atmosphere Nitrogen ... – PowerPoint PPT presentation

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Title: 0003 Atmosphere, climate and weather: 1. identify the basic composition, structure, and properties of the atmosphere.


1
0003 Atmosphere, climate and weather 1.
identify the basic composition, structure, and
properties of the atmosphere.
2
Chemical Composition of the Atmosphere
  • Nitrogen 78
  • Oxygen 21
  • Argon 0.9
  • Carbon Dioxide 0.03
  • Trace substances
  • Water Vapor

3
0003 Atmosphere, climate and weather 2.
analyze the significance of changes in weather
variables (e.g., clouds, humidity, wind speed)
4
(No Transcript)
5
5 variables influence the atmosphere
  • Temperature
  • Pressure
  • Humidity
  • Cloudiness
  • Winds

6
Variables influencing the atmosphere temperatur
e
  • Measure of heat
  • Average kinetic energy of molecules
  • Weather reports give air temperature at ground
    level

7
Variables influencing the atmosphere pressure
  • High Pressure
  • Region where air has piled up
  • Warmer and dryer than surrounding air
  • Low Pressure
  • Region where air has stretched out
  • Tends to rise and cool, vapor condenses into
    clouds

8
Variables influencing the atmosphere humidity
  • relative humidity
  • the ratio of
  • amount of water vapor in air at current temp
  • to
  • max amount vapor air can hold at that temp

9
Variables influencing the atmosphere cloudiness
  • Water droplets
  • Ice crystals
  • Warm air rises, cools and condenses
  • (phase change)

10
Variables influencing the atmosphere winds
  • Due to differential heating of the earths
    surface
  • Warm air rises
  • Cooler air flows in

11
Why is it warmer near the Earths equator and
colder near the poles? What patterns of global
air flow occur?
  • Check your neighbor. Make a sketch to explain
    your answer.

12
Global Air Circulation Patterns
13
The Instruments
  • Thermometer
  • Hygrometer
  • Barometer
  • Weathervane
  • Anemometer

14
Winter Air Masses
  • Continental Polar
  • Maritime Polar
  • Maritime Tropical

15
Summer Air Masses
  • Continental Polar
  • Maritime Tropical
  • Continental Tropical

16
Fronts a clash of air masses
  • Cold Front
  • digs in underneath a warm air mass
  • Warm air rises, mixes with colder air,
    condenses into clouds

17
Fronts a clash of air masses
  • Warm Front
  • rides up above the cold air
  • In the rising warm air, clouds form far ahead of
    advancing warm front

18
0003 Atmosphere, climate and weather 3.
recognize the effects of large bodies of water,
large land areas, and differences in elevation on
weather and climate.
19
0003 Atmosphere, climate and weather 4.
demonstrate knowledge of weather patterns and the
causes and effects of local and regional weather
events (e.g., thunderstorms, hurricanes)
20
0003 Atmosphere, climate and weather 5.
analyze global weather and climate patterns.
21
0003 Atmosphere, climate and weather 6.
recognize the methods and types of technology
used to observe, measure, and predict climate and
weather.
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