Which statement correctly describes Maritime Tropical (mT) air mass?

Which statement correctly describes Maritime Tropical (mT) air mass?

• A. Hot, very moist, unstable air mass.
• B. Cold, moist, unstable air mass.
• C. Cold, dry, stable air mass.
• D. Hot, dry, stable air mass.

Answer: (A)

Maritime Tropical air masses form over warm tropical oceans, so they are warm and carry a lot of moisture. That combination makes the air buoyant and prone to rising when lifted, which leads to instability and convection. Because of the high humidity, these air masses also bring humid, sultry conditions and can fuel thunderstorms. So describing it as hot, very moist, and unstable captures the typical character of maritime tropical air. The other descriptions mix in cold or dry properties that belong to different air masses (for example, cold and moist would be a different type, and hot and dry often refers to other origins with different stability characteristics).

Maritime Tropical air masses form over warm tropical oceans, so they are warm and carry a lot of moisture. That combination makes the air buoyant and prone to rising when lifted, which leads to instability and convection. Because of the high humidity, these air masses also bring humid, sultry conditions and can fuel thunderstorms. So describing it as hot, very moist, and unstable captures the typical character of maritime tropical air. The other descriptions mix in cold or dry properties that belong to different air masses (for example, cold and moist would be a different type, and hot and dry often refers to other origins with different stability characteristics).