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Geography 2152F/G Midterm: Reading Questions

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Western University
Geography 2152F/G
Mark Moscicki

GEOG 2152: Geography of Hazards Reading #2 Review Questions 1.Explain the science behind how El Niño and La Niña are able to influence weather patterns worldwide. • During an El Nino, a giant pool of warm water that normally sits in the central Pacific travels east to South America and Peru while causes drought and fire on Australia. • During a La Nina it shrinks and retreats into the western Pacific, resulting flood in Australia and rains in Southwest America, Texas and even in East Asia. • Heat and water vapor coming off the warm pool generate powerful thunderstorms. 2. What trend has been noticed over the last several decades in terms of atmospheric moisture content? Why does this trend exist? • A long-term buildup of greenhouse gases in the atmosphere is trapping heat and warming up the land, oceans and atmosphere. The average surface temperature worldwide has risen nearly on degree in the past 40 years. • As the oceans warm, they are giving off more water vapor. 3. Because of shifting climatic circulation patterns, which areas around the world are becoming increasingly prone to intense droughts? • Texas because of the lack of rain. 4. With respect to the polar jet stream, how does a warming global climate lead to more extreme weather? • The polar jet stream adds north-south meanders 曲流 to its path around the planet, ma
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