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Air
movement is caused by different air masses having different temperature
and densities. The lower atmosphere heat from the surface of the earth.
Different types of surface radiate heat differently so the atmosphere is
not heated equally at all locations. This means that the atmosphere is
warmer in some places and coolers in others and air movement (wind) results.
"On clear, calm evenings, temperature differences between a body of water and neighboring land produce a cool wind that blows offshore. This wind is called a "land breeze". Land breezes are strongest along the immediate coastline but weaken considerably further inland. Since the pressure at any location is determined by the weight of the air above it, the removal of air from higher levels causes the pressure at levels below to decrease. In the case of a developing sea-breeze circulation, an area of low pressure develops over land at the surface in response to the removal of air at higher levels by offshore flow. Conversely, an area of surface high pressure develops over water in response to the accumulation of air at higher levels. These areas of high and low pressure establish a surface pressure gradient which generates an onshore flow of air at the surface, or sea breeze." from Department of Atmospheric Sciences, WW2010 University of Illinois: Land and Sea Breezes |
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1.
Power is necessary to move something. What is the power to move air between
land and sea, and how is it produced?
2. People want to sail out to the sea only using wind power. When would you launch your boat, early morning, afternoon, or midnight? 3. Who would be affected by land-sea breezes? Make a list of careers. |
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EP-
LAKERS (Lake-Aware
Kids Engaged in Relevant Science
EP-079 The Great Lake Erie EP-083 Earth Systems - Education Activities for Great Lakes Schools (ES-EAGLS): Climate and Water Movement |
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1. The Great Lake Erie
Climate and Water Movement
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Land Breezes
Source: Department
of Atmospheric Sciences,
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1. WW2010 University of Illinois: Land and Sea Breezes http://ww2010.atmos.uiuc.edu/(Gl)/guides/mtr/fw/land/cls.rxml 2. Current Climate Situation in the Midwest |
