What is the characteristic temperature of the SOUTH side of an upper-level westerly jet compared to the north side?

• A. Cooler
• B. Warmer
• C. Colder
• D. Neutral

Answer: (B)

The characteristic temperature on the south side of an upper-level westerly jet is generally warmer compared to the north side. This phenomenon occurs due to the presence of different air masses and their associated temperature gradients.

In an upper-level westerly jet, the air flows from west to east at high altitudes, and the jet stream typically separates warm air to the south from colder air to the north. The descending air associated with the jet stream leads to compression and warming on the south side, while the north side typically experiences rising air, which can result in cooling due to expansion. Thus, this dynamic contributes to the temperature contrast, making the air on the south side warmer than that on the north side of the jet.

This understanding of jet streams and the behavior of air masses is crucial for predicting weather patterns, turbulence, and the development of systems that can affect flight safety and operations.