Weather and Meteorology - Glossary
Included in this glossary you'll find terms related to our public forecasting program, weather observations and unique terminology that is of Environment Canada's hurricane centre and ice service products.
The mass of air held close to the earth by gravity. The atmosphere is divided into four sections: the troposphere reaches an altitude of about 10 km from the earth's surface; the stratosphere which is at 10 km to 50 km from the earth’s surface; the mesosphere which is at 50 km to 80 km from the earth’s surface; and lastly the thermosphere which is anything beyond 80 km from the earth’s surface.
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