Factors Affecting Climate

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Factors Affecting Climate

Latitude

How far north or south a place is on Earth can determine what type of climate it has

Low latitudes – the area between the Tropic of

Cancer and the Tropic of Capricorn, including the

Equator.

The low latitudes receive the most direct sunlight year round

Warm to hot climate, very tropical

Latitude

High Latitudes – the earth’s polar areas

Very cold due to a lack of direct sunlight

Mid-latitudes – the area in between the high and low latitudes

In the summer the mid-latitudes are warm

In the winter the mid-latitudes are cold

In general, the climate is temperate – not too hot, but not too cold

There can be dramatic seasonal weather changes

Describe what your closet would look like in each of the three latitude areas?

Elevation

Elevation can affect climate in an area

As elevation increases the earth’s atmosphere thins

Thinner air retains less heat, so temperature drops

In general for every 1000 feet of elevation increase, the temperature will drop 3.5 degrees

EXAMPLE: Quito, Ecuador has an average temperature that is 32 degrees cooler than other cities nearby

Wind

Wind distributes the suns heat around the earth

Winds blow in patterns, not at random, called prevailing winds

Winds are often named for the direction they blow or from names given during early history when sailing was important

Trade winds – the wind that blows in the low latitudes

Westerlies – the wind that blows in the mid-latitudes

Polar easterlies – the wind that blows diagonally east to west pushing cold air toward the mid-latitudes

Ocean Currents

Just like wind, water in the ocean moves in patterns called currents

Ocean currents have a tremendous affect on the climate in coastal areas

For example, a warm water current flows from the

Caribbean Sea toward Europe. That is why places like England typically do not have bitterly cold weather

Landforms

Bodies of water, mountains, and other landforms can affect climate

Example: Lake Michigan causes very strong wind to come off the lake and hit Chicago

Example: The Rain Shadow Effect in California

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