Climate Classifications & Their Global Distribution

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  • 0:06 Earth's Many Climates
  • 1:08 5 Major Climates
  • 4:47 Lesson Summary
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Lesson Transcript
Instructor: Sarah Friedl

Sarah has two Master's, one in Zoology and one in GIS, a Bachelor's in Biology, and has taught college level Physical Science and Biology.

Earth has many climates, but we can categorize them based on common characteristics. In this video lesson you will identify the 5 major climate classifications on Earth, as well as where on Earth these climates are found.

Earth Has Many Climates

No two places on Earth will have exactly the same climate, which is the overall pattern of meteorological conditions, such as temperature, humidity, air pressure, wind and precipitation. If this sounds a lot like weather, it's because climate is basically the long-term weather patterns of an area. While weather is a more day-to-day view of these variables, the climate of an area is these variables over a long period of time.

Though no location on Earth will have exactly the same climate as another, many do have very similar climatic characteristics. In fact, these characteristics were first classified in 1884 by a Russian-German climatologist named Wladimir Köppen. Named after its founder, the Köppen Climate Classification system categorizes Earth's climates into five major groups based on the native vegetation present. He based his classification system on plants because he felt that they are the best representative of the local temperature, precipitation and other variables that contribute to climate.

Earth's Five Major Climates

Though vegetation helps us classify the major climate types on Earth, we tend to describe them in terms of temperature and humidity. The classifications start at the equator and work their way outward, all the way to the Polar Regions. And to make it easy, the classifications are just letters of the alphabet. The first is A, which is along the equator, then B, C, D and finally E at the Polar Regions.

Group A, our first climate classification, is also known as 'humid tropical.' This is what you would expect at the equator - a warm, wet climate. Temperatures here stay pretty warm all year round (summer is the only season here!), and we also find the world's rainforests in this region, like the Amazon (you could even think of Group A for Amazon).

Group B is the next climate classification, one step away from the equator both north and south. This is also known as the 'dry' group because there is little moisture in the air here. Not surprisingly, we find the world's great deserts in this region, like the Sahara in Africa and the Great Victoria in Australia, so you could even think of Group B as the 'barren' group. Like Group A, temperatures also stay fairly constant in this region, with little seasonal change throughout the year.

Group C is our next classification, now two steps away from the equator. This group is also known as the 'humid middle latitude with mild winters' region. So, think of Group C for 'cold' since these regions do have winters (unlike Groups A and B). It's called humid because there's moisture in the air, middle latitude because it is about mid-way between the equator and the polar region (either north or south) and mild winters because while it may get cold and snowy, they are still fairly tolerable conditions. These areas have wonderful seasonal changes and occur in places like the central U.S., southern Europe and central South America.

Group D is our second to last classification, so we're getting pretty close to the poles now. You can think of these regions as Group D for 'darn cold!' because the winters are much more severe than in Group C. This group is also known as the 'humid middle latitude with severe winters' region. While closer to the poles, we're still in somewhat middle latitudes here, and the air is still moist, but man, these winters really are cold! Think of places like northern Canada and Siberia and you'll likely understand why these get the 'severe winter' classification.

Our final group is Group E, the polar group. Think 'E' for 'end of the line.' You can't go any farther than the poles! Like Group A, there's no seasonal change here but on quite the opposite end of the spectrum. As you might expect, this region is very cold all year round! Both the Arctic and the Antarctic regions of Earth are part of this climate classification.

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