Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An atmospheric area about 80 kilometers (50 miles) above the earth's surface, forming the upper boundary of the mesosphere.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun In the
atmosphere , the boundary between themesosphere and theionosphere . It is the atmospheric boundary where the temperature reaches its minimum value.
Etymologies
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Examples
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At the top of the mesosphere is another transition zone known as the mesopause.
Atmosphere layers 2010
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What is the volume of air in a 5×5 degree grid (say 0-5 lat 0-5 long) that goes up ~80 km (guessing the below stops around the mesopause boundry and doesn’t count all the way the full 10,000)
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