Jetstream Ratios and Dimensions MET
Pure exam facts, the ratio of height to width (note the order does matter) is 1:100. Typical values for the length, width and length are 1000nm long, 150nm wide and 18000' in vertical extent. You can often figure out which are the wrong answers by knowing the height of the troposphere (the jetstream does not cover the entire thing!) and comparing the width/height figures to ensure they are in the ratio 1:100.
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What is the approximate height to width ratio for a jetstream?