Continental Arctic (cA) is described as which of the following?

Continental Arctic (cA) is described as which of the following?

• A. Very cold, very dry, stable air mass
• B. Cold air mass
• C. Warm air mass
• D. Moderate air mass

Answer: (A)

Continental Arctic air masses are defined by being exceptionally cold, extremely dry, and very stable. They form over polar continental regions where surface cooling creates an extremely cold air column, and because they develop over land, they contain very little moisture. That combination—low temperatures, very low humidity, and strong stability that resists vertical mixing—leads to dense air with long-lasting, dry conditions and often clear skies. This description captures the essence of cA, distinguishing it from simply “cold,” “warm,” or “moderate” air masses.

Continental Arctic air masses are defined by being exceptionally cold, extremely dry, and very stable. They form over polar continental regions where surface cooling creates an extremely cold air column, and because they develop over land, they contain very little moisture. That combination—low temperatures, very low humidity, and strong stability that resists vertical mixing—leads to dense air with long-lasting, dry conditions and often clear skies. This description captures the essence of cA, distinguishing it from simply “cold,” “warm,” or “moderate” air masses.