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« Hurricane » is one of the names given to a tropical storm whose winds revolve around a center of low pressure called the eye, at a minimum speed of 120 kilometres per hour. At a center of hurricanes vortex - the eye - there is calm area of blue sky. Around this central column, there are very...

The education index is a measure of the proportion of the population 15 years of age and over who have post-secondary qualifications compared to the Canadian proportion meeting the same criteria. The index values are generally lower than the Canadian average. The median value is 0.78, and 88% of...

The income index compares the average employment income value of each community to that for Canada. The value for Canada as a whole is set at 1.00. The range of the index is from 0.12 to 1.65, with the median value for these communities being 0.73. Income index values are generally higher in...

Fifteen ecozones make up terrestrial Canada, and five make up the marine waters bordering Canada. Canada’s 15 terrestrial ecozones can be subdivided into 53 ecoprovinces, which can be further broken into 194 ecoregions. Ecozones are useful for general national reporting and for placing Canada’s...

This map shows the location of the Interior Plains physiographic region. The Interior Plains occupy the region between the Shield on the east and the mountains of the Cordilleran Region on the west. They join with the St. Lawrence Lowlands of eastern Canada through the United States and are...

This map shows a simplified distribution of land cover types across Canada interpreted from satellite data obtained in 1995. Land cover has an important role in the water cycle as it significantly affects evapotranspiration and the amount of water leaving a watershed. Evapotranspiration is the...

This map shows the average maximum snow depth in centimetres computed over 18 winter seasons (1979 to 1997). Over southern Canada this usually occurs in January or February, while the time of maximum accumulation occurs much later in mountain areas and in the Arctic. The main features of the map...

Tornadoes are columns of air that spin at a high rate of speed. They are small in scale but can be very violent. The area affected by a tornado's passage is between about 40 and 400 metres in width and between 1.7 and 36 kilometres in length. During a tornado the damage is due to wind as well as...

This map shows the location of the Arctic physiographic regions which include the Innuitian Region, the Arctic Lowlands and the Arctic Coastal Plains.

A drainage basin is an area that drains all precipitation received as a runoff or base flow (groundwater sources) into a particular river or set of rivers. Canada’s major drainage regions are the Atlantic Ocean, Hudson Bay, Arctic Ocean, Pacific Ocean and Gulf of Mexico. Rivers are organized into...