UNT BIOL 2140 - Exam 3 Study Guide (13 pages)

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Exam 3 Study Guide



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Exam 3 Study Guide

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climate and biomes, climate change and remote sensing


Pages:
13
Type:
Study Guide
School:
University of North Texas
Course:
Biol 2140 - Ecology
Ecology Documents

Unformatted text preview:

BIOL 2140 Exam 3 Study Guide Lectures 1 12 Lecture 1 October 27 Global climate patterns moisture and temperature are key factors that reflect biological communities Insolation patterns amount intensity of sunlight received in one area vs another Insolation is responsible for determining moisture and temperature in a given area Solar energy irradiation sunlight heat Sun provides a lot of energy 25 reflected by clouds and gases reflectivity albedo 25 absorbed in the atmosphere into greenhouse gases 50 reaches earth What happens if we didn t have the greenhouse effect the earth would be very cold Differential insolation drives weather and climate What is the difference between weather and climate Weather atmospheric conditions at the moment Climate long term characteristic weather patterns averages Regions of intensity in a globe model High intensity solar energy hits concentrated on a small area equator region of greatest warming Lower intensity the same amount of solar energy hits spread over a broader area due to shallow angle of impact less warming poles Equatorial conditions 1 Solar energy hits the air and water causing the air and water molecules to move faster higher kinetic energy 2 As the water molecules increase in kinetic energy more of them gain the escape velocity to break their hydrogen bonds and evaporate into the air as vapor the various other gases in the air are similarly imparted with energy such that they too move faster causing them to be more spread out the air mass is less dense and begins to rise 3 As the air and water gases rise upward through the atmosphere there is less and less weight of atmospheric gases pushing on them from above the volume of the air mass expands just because it isn t being squeezed as much anymore the molecules are able to move even further apart but simply due to the release of pressure rather than a gain of kinetic energy 4 All else being equal this expansion in volume due only to reduction in pressure causes the



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