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Chapter 17: Problem 16

Define two types of permafrost, and differentiate their occurrence on Earth. What are the characteristics of each?

Short Answer

Expert verified
Permafrost is of two types: Continuous and Discontinuous. Continuous permafrost is found in high latitudes and is characterized by its persistence and lack of seasonal thawing. Discontinuous permafrost is found further south, occurs in patches, and does thaw seasonally.

Step by step solution

01

Definition and Characteristics of Continuous Permafrost

The first type of permafrost is Continuous permafrost. It's found in high latitudes, typically in the northernmost parts of North America, Europe, and Asia. It refers to a situation where permafrost is present everywhere under the ground in a particular region. The characteristics of Continuous permafrost include high latitude location, persistent cold temperatures and a lack of seasonal thawing.
02

Definition and Characteristics of Discontinuous Permafrost

Discontinuous permafrost is the second type and it's found further south of continuous permafrost regions. It occurs in patches, not consistently covering the entire area. The characteristics of Discontinuous permafrost include locations with slighter warmer temperatures, inconsistent presence of permafrost, and seasonal instances of thawing.
03

Differentiation of Occurrence on Earth

When looking at the occurrence of these types of permafrost on Earth: Continuous permafrost is present at high latitudes, typically in the Arctic, Antarctic, and certain high mountainous regions. On the other hand, Discontinuous permafrost is found in sub-Arctic regions or places with a high-altitude but slightly warmer climate, such as the plateaus of Mongolia or certain regions of Alaska.

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