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CGC1D-Physical Connections. Weather & Climate. Weather vs. Climate. Weather Generally defined as the condition of the atmosphere over a short period of time Usually 1 day. Climate Condition of the atmosphere considered over a long period of time. Factors Affecting Weather & Climate.

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Cgc1d physical connections

CGC1D-Physical Connections

Weather & Climate


Weather vs climate
Weather vs. Climate

Weather

  • Generally defined as the condition of the atmosphere over a short period of time

  • Usually 1 day

Climate

  • Condition of the atmosphere considered over a long period of time


Factors affecting weather climate
Factors Affecting Weather & Climate

6 major factors that affect weather and climate.

They can be on two different scales:

Global

Local


The 6 factors
The 6 Factors

  • Latitude

  • Ocean currents

  • Winds and air masses

  • Elevation (altitude)

  • Relief (presence of physical features)

  • Nearness to large bodies of water


Defining the 6 factors
Defining the 6 Factors

  • Class will be divided into 6 groups

  • Each group will be assigned 1 weather/climate factor

  • Task:

    • create an overhead presentation on how your group’s factors affects weather/climate

  • Things to include:

    • Is your factor global or local (both)?

    • Where in Canada does this factor play a role? (particular landform region? Province? Etc.)

    • Are there different effects in different seasons?

    • Draw a diagram to help explain the concept

  • Textbook pp. 145-153

  • Timeline: 25 minutes


Latitude
Latitude

  • As latitude increases (north and south of the equator) the temperature decreases

  • Has to do with solar radiation and the angle of incidence

    • angle the suns rays hit the surface of the earth


Elevation altitude
Elevation (Altitude)

  • The higher the elevation, the cooler the temperature

  • Air expands as it rises from the earth’s surface.

    • The air expands because the pressure on the outside of the air mass is less than that of the rising air mass.

    • As the air expands there is more space for molecules to move around in so their energy is transferred, resulting in cooling of the air mass.

  • Air cools at approximately 1degC/100m


Ocean currents
Ocean Currents

  • If ocean currents are warm, they will keep both winter and summer conditions on the land warmer than expected (i.e. the Gulf Stream).

  • Cold currents such as the Labrador Current have the opposite effect.


Winds and air masses
Winds and Air Masses

  • Winds can move cool air to moderate a hot area, or moist air to bring rain to a dry area.

  • Basic principle – they move dense, heavy air from high pressure areas towards areas of low pressure where the air is less dense, lighter and rising.

  • Air masses take on the characteristics of the surface they are sitting over (i.e. an air mass over and ocean in the tropics will be warm and moist)


Relief
Relief

  • Physical features have a considerable influence on weather and climate

  • Mountains can act as a barrier where the windward side would get a lot of rain and the leeward side would receive little rain

  • Flat plains enable cold air, dry air from the north to reach far into North America


Bodies of water
Bodies of Water

  • Oceans and Great Lakes

  • Act in the opposite was of air masses

  • Water heats and cools much slower than land

  • Lakes tend to be cool when the land is warm and vise versa

  • Moderating effect


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