ATOC 1050 chapter 7 notes

ATOC 1050 chapter 7 notes - Chapter 7 The Development of...

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Chapter 7 – The Development of High and Low Pressure Systems ATOC 1050 I. Mass convergence and divergence A. Air converges if the flow of air into a column of air increases with time. B. Air diverges if the flow of air in a column of air decreases with time. From pg. 120 in text: *Or from pg. 126 in text: 1
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C. This diagram is VERY important!!! 1. Look at the diagram on the left first . a. Convergence at the polar jet stream level (or convergence “aloft”) causes air to subside (note the down arrow) and a surface , synoptic scale high pressure to form at the surface. (Why a high pressure? More mass above you!) Consequently, there is divergence at the surface (air moves from high to low pressure). b. Subsiding, adiabatic compressing, and warming air is the result. The resulting weather 2
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can be considered “good” (low chance of storms or precipitation), but air can be polluted due to stagnant air. c. This type of synoptic scale high pressure
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ATOC 1050 chapter 7 notes - Chapter 7 The Development of...

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