Pressure and Wind
Denoyer-Geppert Weather Chart
Divided into quadrants, this presentation features colored action diagrams to enliven understanding of the forces which create and influence winds.
The first frame delineates the alternating bands of high and low pressure air encircling the spinning earth. colored arrows indicate the paths followed by prevailing winds.
The second sequence maps the shifting of the heat equator and the pattern of high and low pressure air masses during the months of january and july.
A third segment introduces the concept of isobars.
The final quadrant, divided into two panels, illustrates the clockwise, downward, spiraling of winds from a high pressure zone, and the counterclockwise, upward, rotation of wind flow into a zone of low pressure. Diurnal tempeature differences between land masses and bodies of water are shown to be the cause of onshore sea breezes during daylight hours, and offshore land breezes at night.
Catalog number: 1935-10
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