Browse "Climate and Climatology"

Displaying 16-27 of 27 results

  • Article

    Humidity Across Canada

    Humidity Across Canada Humidity Across Canada City % Chance of Discomfort Extreme Humidity (°C) Date St John's 9 38. 6 6 July 1983 Charlottetown 21 40.72 22 Aug 1976 Halifax 9 39.8 1 Sept 1953 Fredericton 36 44.5 10 July 1955 Montréal 46 46.8 1 Aug 1975 Ottawa 41 46.0 1 July 1955 Toronto 44 48.0 1 Sept 1953 Windsor 62 52.1 20 June 1953 Winnipeg 37 45.9 2 Sept 1983 Regina 25 44.5 19...

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  • Article

    Humidity and Humidex

    Humidity is related to the amount of moisture or water vapour in the air. Although invisible, water vapour is always present in the atmosphere. 

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  • Article

    Polar Vortex

    The polar vortex is a wind pattern surrounding the Earth’s poles. Both the North and South pole have polar vortices spinning around them. In both cases, the rotation is generally cyclonic — counter-clockwise around the North Pole and clockwise around the South Pole. While polar vortices exist year-round, they are strongest during each pole’s winter. Canadians tend to experience the effects of the North Pole’s polar vortex toward the end of winter. At this time, the vortex begins to weaken, and cold, polar air travels further south. Polar vortices are atmospheric phenomena which occur on other planets too, such as Mars, Venus and Saturn. 

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  • Article

    Station PAPA

    Station PAPA Ocean Weather Station "P" is commonly called Station PAPA after the code word for the letter P in the phonetic alphabet used by radio operators. Station PAPA is located in the N Pacific Ocean (50° N, 145° W) and has a water depth of 4200 m.

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  • Article

    Statistics

    Statistics is the science concerned with the collection and analysis of numerical information to answer questions wisely. The term also refers to the numerical information that has been collected. Statistics has many applications in Canada, from government censuses and surveys, to decision making in industry, to medical research and technological innovation.

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  • Article

    Strategic Environmental Assessment

    Strategic environmental assessment is the environmental assessment of policy, plan and program initiatives and their alternatives.

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  • Article

    Urban Effect on Climate

    Both land surface and air are altered by urbanization. Buildings change the geometric arrangement of the land surface, creating a rigid, rough system of blocks and street "canyons," especially in the centre of cities.

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  • Article

    Weather

    WEATHER FORECASTING is the attempt to understand atmospheric patterns to predict the weather conditions that will occur at a specific place and time, including temperature, wind, cloud, precipitation and humidity.

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  • Article

    Weather Forecasting

    Most modern meteorologists attempt to cope with physical processes by expressing them mathematically, ie, by creating mathematical models of the atmosphere. Powerful computers are then used to solve problems.

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  • Article

    Weather Modification

    Weather modification has been used in an attempt to increase rainfall and snowfall, to suppress hail, to clear fogs, to modify tropical cyclones and to suppress lightning. The term "weather modification" is not normally used to describe inadvertent changes in our WEATHER.

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  • Article

    Weather Observations

       Weather in Canada ranges from the extreme cold of the Arctic to tornadoes and other severe weather in the southern regions; from the storms and fog of the Atlantic to the dry heat and majestic thunderstorms of the prairies.

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  • Article

    Wind Chill

    The more pronounced the air movement (wind or moving air produced by walking, skiing or riding in a convertible) and the greater the temperature difference between the surface of the object and the air, the greater the heat loss.

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