The Jet Stream 3.0 / 5 based on 1 rating ? GeographyWeather systemsA2/A-levelAQA Created by: Georgew298Created on: 30-03-16 14:47 What is a jet stream? A current of fast moving air in the upper levels of the atmosphere (between air masses of different temps) 1 of 6 How large is the Jet Stream? Thousands of KM long, a few hundred KM wide and a few KM thick 2 of 6 How far above the surface does the Jet Stream flow? 10-15 km above the surface 3 of 6 How fast is the Jet stream? Exceeds 100mph and can peak at 200mph 4 of 6 When do Jet Streams form? Usually form in the winter due to cold continental air masses and warm oceanic air masses meeting 5 of 6 How does temperature difference affect air pressure? The greater the temp difference, the greater the air pressure difference and the faster the winds blow 6 of 6
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