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If divergence in the jet stream above a surface

Chapter 18, Problem 6

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QUESTION:

If divergence in the jet stream above a surface low-pressure center exceeds convergence at the surface, will surface winds likely get stronger or weaker? Explain.

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QUESTION:

If divergence in the jet stream above a surface low-pressure center exceeds convergence at the surface, will surface winds likely get stronger or weaker? Explain.

ANSWER:

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When discussing the behavior of surface winds in relation to the jet stream and surface low-pressure centers, it's crucial to consider the fundamental principles of atmospheric dynamics. Surface winds are influenced by a combination of factors, including pressure gradients, the Coriolis effect, and the influence of upper-level winds, such as the jet stream. To determine whether surface winds are likely to get stronger or weaker, Let's analyze the relationship between divergence in the jet stream and surface convergence.

1. Jet Stream and Divergence:

The jet stream is a high-altitude, fast-moving air current that meanders across the atmosphere. Divergence refers to the spreading of air at the upper levels of the atmosphere. In the context of the jet stream, when there is divergence, it means that air is moving away from a particular region.

2. Surface Low-Pressure Center and Convergence:

Surface low-pressure centers are areas where the air at the surface is rising. As air ascends, it creates a region of low pressure at the surface. In the vicinity of a surface low-pressure center, air converges, meaning that air masses are moving toward that location at the surface.

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