GEOG 162 Lecture Notes - National Energy Program, Urban Geography (Journal), Sony Max

82 views3 pages

goldgerbil543

14 Aug 2012

School

Simon Fraser University

Department

Geography

Course

GEOG 162

Professor

Michele Wiens

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

Document Summary

The two main physiographic regions here are the interior plains and the canadian shield (also there is a slice of the cordillera along the western edge of this region) Precipitation is similar to other regions but summers are longer and evaporation rates higher. Summer fallow is common to preserve soil moisture and fertility. Captain palliser"s survey (1857) concluded that short-grass vegetation area of southern alberta and saskatchewan was a northern extension of am desert; poor for agriculture. The prairies is seen as an agriculture region however; the area is not optimum for agriculture compared to southern ontario and southern quebec. Frost is unpredictable, no mountain barriers to the north so area is susceptible to arctic air. Homesteaders flocked here (1870-1914 and post war), creating a rural landscape of small farms. Rural to urban migration, whereby rural people moved to towns and cities (and bc urban centres) Push factors were mechanization of agriculture sector, consolidation of farms, shrinking need for labour.

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 Lecture Notes - National Energy Program, Urban Geography (Journal), Sony Max

Document Summary

Get access

Related Documents

GEOG 162 Lecture 8: GEOG 162 Chapter 8

GEOG 162 Lecture 8: Western Canada

GEOG 162 Lecture Notes - Lecture 2: Habitat Destruction, Muskeg, Beringia

Related Questions