troposphere
pronunciation
How to pronounce troposphere in British English:
UK ['trɒpəsfɪə(r)]
How to pronounce troposphere in American English:
US ['trɒpəsfɪə(r)]
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- Noun:
- the lowest atmospheric layer; from 4 to 11 miles high (depending on latitude)
Word Origin
- troposphere (n.)
- 1914, from French troposphère, literally "sphere of change," coined by French meteorologist Philippe Teisserenc de Bort (1855-1913) from Greek tropos "a turn, change" (see trope) + sphaira "sphere" (see sphere). Related: Tropopause.
Example
- 1. Was he in the troposphere , stratosphere , mesosphere or thermosphere ?
- 2. Measurements and analyses of ozone concentrations at the ground surface and in the lower troposphere in southwest china .
- 3. The stratosphere sits on top of the troposphere , the lowest , densest layer of the atmosphere .
- 4. This is because the top of the troposphere is normally very cold , causing ascending water vapour to freeze into ice crystals that drift and fall , rather than continuing up into the stratosphere .
- 5. Above the troposphere , seen as a light blue band with white clouds , is the stratosphere , part of the earth 's atmosphere where airplanes fly and some hardy bacteria float .