The polar high is characterized by which of the following?

• A. A region of predominantly low average surface pressure
• B. A region of predominantly high average surface pressure and clear skies
• C. A region of frequent storms and precipitation
• D. A region of variable pressure and cloudy conditions

Answer: (B)

The polar high is characterized by a region of predominantly high average surface pressure. This high-pressure system typically forms over the poles due to the cold air, which is dense and heavier, leading to an accumulation of high pressure. Clear skies are often associated with polar highs because the descending air creates stable atmospheric conditions that inhibit cloud formation.

In polar regions, the extremely low temperatures contribute to a lack of moisture in the air, which is why clear conditions can prevail under high-pressure systems. While some cloud cover can occasionally occur, particularly at the edges of the polar highs, the overall characteristic feature of these regions is their stability and clarity when compared to neighboring areas where conditions might more variable.

The other choices reflect conditions that are not typically associated with polar high regions, which further reinforces the accuracy of the correct answer.