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Precipitation
 

Precipitation

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    Precipitation Precipitation Presentation Transcript

    • Geography of Precipitation Western Canada
    • Precipitation • The amount of precipitation a location receives depends on its distance from the sea and the prevailing winds • Precipitation = drizzle, showers, heavy rain, hail, or snow — all have an impact on the location they fall • Western Canada experience three types: orographic, convectional, and frontal
    • Orographic Precipitation
    • Orographic Precipitation • The prevailing winds blow moist air onshore • As the air hits higher land, the air is forced to rise • When air rises it begins to cool • When it can no longer hold all its water; it starts to condense and form clouds • Orographic = affected by mountains
    • Convectional Precipitation
    • Convectional Precipitation • Water in the ocean and lakes is warmed by the sun • The air above becomes heated • This makes the air less dense, so it rises; as it rises it cools • Cool air can not hold as much water vapour = condensation occurs, gradually becoming clouds
    • Frontal Precipitation
    • Frontal Precipitation • Two air masses of warm and cold air meet, causing a front • When they meet, the less dense, warm air is forced above the denser, heavier cold air • When air can no longer hold its water, clouds form