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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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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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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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Pollution can be defined as the release of any material, energy or organism that may cause immediate or long-term harmful effects to the natural ENVIRONMENT. Pollution was viewed initially as the unsightly mess or visible environmental damage resulting from careless disposal of various materials.
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Pollution Probe was formed in 1969 by a group of University of Toronto students in an effort to address some of the environmental issues that were without a champion at the time. The organization became a registered charity in 1971.
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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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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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Strategic environmental assessment is the environmental assessment of policy, plan and program initiatives and their alternatives.
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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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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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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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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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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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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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