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GEOL 2207 (204)
J.Finnis (74)
Lecture

Lightning THUNDER.docx

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Department
Geology
Course
GEOL 2207
Professor
J.Finnis
Semester
Summer

Description
Lightning THUNDER Thunder - Created by lightning o An electrical discharge through the air that heats the air to temperatures warmer than the surface of the sun - HEAT causes the air to incandesce (glow) - Path is instantly heated by lightning expanding to create shockwaves Classifying lightning - Cloud-to-cloud (intercloud, IC) - Cloud-to-ground (CG) Cloud to Ground - Can be further classified by whether – or + charge moves to the ground - Negative strikes o form from the cloud base and are more numerous - Positive strikes o are less frequent, much stronger form from thunderstorm anvil o
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