GEOG 162 Chapter 2: Geog162 Chapter 2 Physical Geography of Canada.docx

176 views4 pages

goldgerbil543

14 Aug 2012

School

Simon Fraser University

Department

Geography

Course

GEOG 162

Professor

Michele Wiens

For unlimited access to Textbook Notes, a Class+ subscription is required.

Document Summary

Cordillera-runs through bc and forms the western flank. Appalachia-runs through new brunswick and forms the eastern flank. Innuitian mountains-runs east/west along the edge of the arctic. The shield (continental core)-makes up most of canada. The interior plains-the broad region with rolling hills in central canada underlain by sedimentary rock. Plate tectonics is the process by which lithosphere plates containing crustal material move across the earth. If plates collide or move beneath one another (subduction), mountains form (e. g. rockies, This leads to variety of landforms, rocks of various composition, variety of mineralization, etc (metallic, non-metallic minerals, fuels, etc) Core formed as molten magma rose from within the earth, the cooled and hardened (3 billion years ago) Metamorphism (changes due to heat and pressure applied to rock) produced metallic minerals (iron, copper, lead, zinc, nickel, gold, silver, etc) Vast sedimentary plain surrounding the core (nearly 20% of canada) Millions of years ago, a huge inland sea occupied the interior plains.

Related Questions

Tiny solid and liquid particles suspended in the atmosphere are called aerosols. Windblown dust, sea salts, volcanic ash, smoke from wildfires, and pollution from factories are all examples of aerosols. Depending upon their size, type, and location, aerosols can either cool the surface, or warm it. They can help clouds to form, or they can inhibit cloud formation. And if inhaled, some aerosols can be harmful to people's health.

These maps show average monthly aerosol amounts around the world based on observations from the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite. Satellite measurements of aerosols, called aerosol optical thickness, are based on the fact that the particles change the way the atmosphere reflects and absorbs visible and infrared light. An optical thickness of less than 0.1 (palest yellow) indicates a crystal clear sky with maximum visibility, whereas a value of 1 (reddish brown) indicates very hazy conditions.

High aerosol amounts are linked to different process in different places and times of year. High aerosol amounts occur over South America from July through September. This pattern is due to land clearing and agricultural fires that are widespread across the Amazon Basin and Cerrado regions during the dry season. Aerosols have a similar seasonal pattern in Central America (March-May), central and southern Africa (June-September, and Southeast Asia (January-April).

In other cases, however, aerosol concentrations are not related to fires. For example, from May through August each year, aerosol amounts rise dramatically around the Arabian Peninsula and nearby oceans due to dust storms. Elevated aerosol amounts nestle at the foothills of the Himalaya Mountains in northern India in some months, and linger over eastern China for much of the year. These elevated aerosol amounts are due to human-produced air pollution.

What is the most likely source of the high concentration of particulates that appear off the coast of northwestern Africa?

What is the most likely source of the high concentrations of particulates over central Africa and central South America?

What is the most likely source of the high concentrations of particulates over eastern China?

apricottermite85

GEOG 162 Chapter 2: Geog162 Chapter 2 Physical Geography of Canada.docx

Document Summary

Get access

Related Documents

GEOG 2OC3 Lecture Notes - Lecture 2: Hudson Bay Lowlands, Innuitian Mountains, Canadian Shield

GEOG 2510 Chapter Notes - Chapter 2: Innuitian Mountains, Continental Shelf, Plate Tectonics

Geography 2010A/B Lecture Notes - Hudson Bay Lowlands, Innuitian Mountains, Insular Mountains

Related Questions