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The geostrophic wind is a theoretical wind that results from a balance between the Coriolis force and the pressure gradient force (PGF). It is a good approximation for the observed wind in middle latitudes more than ~1 km above the surface.
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Multiple Choice 1. Standard sea level pressure in millibars is. ... d. pressure gradient force . 7. Which of these factors influence the magnitude of the Coriolis force? a. wind speed ... 10. A steep pressure gradient _____. a. would be depicted by widely spaced isobars
Closely space isobars often indicate a steep change in atmospheric pressure across pressure gradients. Because isobars are used to indicate connected points of equal or constant atmospheric pressure, the more closely these lines are placed means that strong winds are likely to be observed.
The force responsible for causing air movement is known as pressure gradient force. To display wind speeds, the pressure gradient is plotted onto a weather map using isobars that are mapped between areas of low and high pressure. Bars that are spaced close together are an indication of strong winds and steep pressure gradient force.
Polar jet streams are typically located near the 250 hPa (about 1/4 atmosphere) pressure level, or seven to twelve kilometres (23,000 to 39,000 ft) above sea level, while the weaker subtropical jet streams are much higher, between 10 and 16 kilometres (33,000 and 52,000 ft).Jet streams wander laterally dramatically, and have large changes in their altitude.
The Pressure Gradient and Other Effects on Wind. Since wind is produced bydifferences in air pressure, it is important to understand pressure gradients, which are the circular lines around a high or low pressure system. Air pressure is created by the motion, size, and number of gas molecules present in the air.
Steep pressure gradient lines are associated when he lines are closest together. Explain why on a surface weather map, closely spaced isobars indicate strong winds and widely spaced isobars indicate weak winds.
To show wind speeds, the pressure gradient is plotted onto weather maps using isobars mapped between areas of high and low pressure. Bars spaced far apart represent a gradual pressure gradient and light winds. Those closer together show a steep pressure gradient and strong winds.
Study 60 Exam 2 flashcards from Kara L. on StudyBlue. Imagine two hypothetical cities, both located at 12° N latitude. However, one is located near sea level, while the other at an elevation of 4,000 m (13,123 ft) above sea level.