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UTSC (19,203)
EESA01H3 (82)
Chapter 13

Chapter 13

2 Pages
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Department
Environmental Science
Course Code
EESA01H3
Professor
Carl Mitchell

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Chapter 13 Atmospheric Science and Air Pollution
The Atmosphere and Weather
The atmosphere is layered
Thermosphere 500 km
Mesosphere 50-80 above sea level extremely low temps
Stratosphere 1000 times as dry as and less dense than troposphere
Troposphere blankets earth`s surface and provides us with the air we need to
live weather
Ozone layer 17-30km above sea level reduces the amount of UV radiation
reaching earth
Relative humidity the ratio of water vapour a given volume of air contains to
the maximum amount if could hold at a given temperature
Seasons
June solstice northern hemisphere tilted towards the sun, summer
(December winter)
March equinox 12 hours of daylight and darkness across the planet (Sept
equinox)
Air masses interact to produce weather
Front the boundary between air masses that differ in temp and moisture
Warm front moister air replaces colder light rain
Cold front colder air replaces warmer thunderstorms
High pressure system (fair weather) vs. Low pressure system (precipitation)
Large-scale circulation systems produce global climate patterns
Hadley-cells at the equator sunlight most intense, surface air warms, rises,
expands, rain
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Description
Chapter 13 Atmospheric Science and Air Pollution The Atmosphere and Weather The atmosphere is layered Thermosphere 500 km Mesosphere 50-80 above sea level extremely low temps Stratosphere 1000 times as dry as and less dense than troposphere Troposphere blankets earths surface and provides us with the air we need to live weather Ozone layer 17-30km above sea level reduces the amount of UV radiation reaching earth Relative humidity the ratio of water vapour a given volume of air contains to the maximum amount if could hold at a given temperature Seasons June solstice northern hemisphere tilted towards the
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