What happens to wind speed as isobars become more closely spaced?

Study for the Earth Science Regents Exam. Dive into flashcards and multiple-choice questions, complete with hints and explanations. Prepare confidently for your exam!

When isobars, which are lines on a weather map that connect points of equal atmospheric pressure, are closely spaced, it indicates a steep pressure gradient. A steep pressure gradient means that there is a significant difference in atmospheric pressure over a short distance. As a result, this leads to stronger winds. The air tends to move more rapidly from high-pressure areas to low-pressure areas in response to the pressure difference, which is what drives wind speed. Therefore, when isobars are closely packed, wind speed increases significantly.

In contrast, when isobars are farther apart, the pressure gradient is less steep, resulting in weaker winds. This relationship between wind speed and the spacing of isobars is a fundamental concept in meteorology, illustrating how air movement is directly influenced by variations in atmospheric pressure.

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