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Weather in Atlantic Canada

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Weather in Atlantic Canada Chapter 3 Condensation Occurs when moist air rises and cools, forming clouds. Air rises because of being warmed from below (convectional ... – PowerPoint PPT presentation

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Title: Weather in Atlantic Canada


1
Weather in Atlantic Canada
  • Chapter 3

2
Condensation
  • Occurs when moist air rises and cools, forming
    clouds.
  • Air rises because of being warmed from below
    (convectional condensation), meeting a colder and
    denser air mass (frontal condensation) or it may
    be blown over high ground. (orographic
    condensation)

3
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4
Wind
  • Wind is air that is moving from an area of high
    pressure to an area of low pressure.
  • An area of low pressure occurs when air above a
    warm surface is heated and rises.
  • An area of high pressure forms when cool air
    sinks towards the surface, pushing the air
    underneath away.
  • High winds can develop between areas of high and
    low pressure.

5
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6
Climate
  • Average conditions of temperature, precipitation,
    humidity, air pressure and wind.
  • Precipitation refers to rain and snow and other
    forms of water particles in the atmosphere
  • Our climate is usually humid and relatively cool.
  • Weather is the conditions of the atmosphere over
    a short period. Climate is weather averaged over
    a period of time.
  • We have a Maritime climate!

7
Atlantic Maritime - a maritime climate, with
temperatures moderated by the Atlantic Ocean, and
large amounts of precipitation.
8
Air Masses
  • Volumes of air with similar temperature and
    moisture conditions are air masses.
  • Continental artic air feels cold and dry.
    Maritime tropical air feels warm and moist.
    Maritime polar air feels cool and moist.
  • The leading edge of an air mass is called a
    front. Fronts bring the characteristics of the
    air masses that drive them and change the weather.

9
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10
Ocean Currents
  • Currents move water from place to place. There
    are two ocean currents that greatly affect our
    climate.
  • The Gulf Stream, an ocean current originating in
    the gulf of Mexico, brings warmth to our waters,
    while warming and bringing moisture to the air
    masses above it.
  • The Labrador Current brings cold to our waters
    while cooling and bringing moisture to the air
    above it.
  • Water has a moderating effect.cooler in summer,
    warmer in winter.

11
Fog
  • Fog occurs when water vapour forms in air with
    particles that are too small to fall as rain and
    remain suspended in slow moving air.

12
Meteorologist
  • Weather expert who studies conditions in the
    atmosphere for the purpose of making weather
    forecasts.
  • Weather radar stations are especially useful in
    detecting. Locating and measuring the amount of
    precipitation in clouds.
  • Satellite imaging is very useful in making
    weather forecasts.
  • A Radiosonde is a piece of equipment carried into
    the atmosphere by a small balloon in order to
    collect information about the upper atmosphere.

13
Cindy Day - Meteorologist
14
Discussion questions
  • Page 41, 1. a, b and c
  • Page 42, 1. a and b
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