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climate.weather.gc.ca
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Definitions (96)
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atmospheric pressure/barometric pressure
Atmospheric Pressure, also called barometric pressure, is the force per unit area exerted by the atmosphere as a consequence of its weight. It is equal to the weight of a vertical column of air of a u [..]
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Blowing dust
Dust that is raised by the wind, to moderate heights above the ground. Visibility at eye level may be reduced to 1 km
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Blowing snow
Snow particles violently stirred up by wind to sufficient heights above the ground to reduce visibility to 10 km
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CALM
An absence of wind flow or any other air motion.
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Celsius
A temperature scale where water at sea level has a freezing point of 0 °C (Celsius) and a boiling point of +100 °C
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Climate
The historical record and description of average daily and in seasonal weather events that help describe a region. Statistics are generally drawn over several decades. Climatology, or the study of cli [..]
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Cloud
A visible collection of minute particle matter, such as water droplets and/or ice crystals, in the air. A cloud forms in the atmosphere as a result of condensation of water vapour. Condensation nuclei [..]
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cooling degree-days
Cooling degree-days for a given day are the number of degrees Celsius that the mean temperature is above 18 °C
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daylight saving time
In Canada, time zones and Daylight Saving Time (DST
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degree-days
Degree-days for a given day represent the number of Celsius degrees that the mean temperature is above or below a given base temperature. For example, heating degree-days are the number of degrees bel [..]
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