ENVIRONMENT: THE SCIENCE BEHIND THE STORIES W/MYENVIRONMENTPLACE Chapter 13 Reading

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Department
Environmental Science
Course
EESA01H3
Professor
Carl Mitchell
Semester
Fall

Description
Chapter 13: Atmospheric Science and Air Pollution The atmosphere and weather - atmosphere consists of roughly 78% nitrogen gas (N ) and 212 oxygen gas (O ) 2 - remaining 1% is composed of argon gas (Ar) and small concentrations of several other gases - permanent gases remain at stable concentrations and variable gases vary in concentration from time to time or place to place as a result of natural processes or human activities The atmosphere is layered - there are four layers - troposphere: bottommost layer that blankets Earths surface and provides us with air temperature drops - tropopause: acts like a cap, limiting mixing bw the troposphere and the layer above it, the stratosphere - stratosphere: extends from 11km to 50 km above sea leveltemperature rises - ozone layer: greatly reduces the amount og UV radiation that reaches Earths surface - mesosphere: extends from 50 km and 80 km above sea leveltemperature drops - thermosphere: top layer that extends upward to an altitude of 500 kmtemp rises Atmospheric properties include temperature, pressure, and humidity - atmospheric pressure: the force per unit area produced by a column of air, also decreases with altitude, bc at higher altitudes fewer molecules are pulled down by gravity - Relative humidity: the ratio of water vapour a given amount of air contains to the maximum amount it could attain at a given temp - Microclimate: the side of a hill that is sheltered from wind or direct sunlight can have a www.notesolution.com
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