troposphere

noun

tro·​po·​sphere ˈtrō-pə-ˌsfir How to pronounce troposphere (audio)
ˈträ-
: the lowest densest part of the earth's atmosphere in which most weather changes occur and temperature generally decreases rapidly with altitude and which extends from the earth's surface to the bottom of the stratosphere at about 7 miles (11 kilometers) high
tropospheric
ˌtrō-pə-ˈsfir-ik How to pronounce troposphere (audio)
ˌträ-
-ˈsfer-
adjective

Example Sentences

Recent Examples on the Web The short answer is the location of the jet stream or storm track — a belt of strong winds high in the troposphere where airliners fly. Los Angeles Times, 12 Jan. 2023 The map above shows where the European Space Agency’s Sentinel-5P satellite detected sulfur dioxide in the middle troposphere with its Tropospheric Monitoring Instrument, or TROPOMI, sensor. Tom Yulsman, Discover Magazine, 30 Nov. 2022 And the map, based on data from the Atmospheric Infrared Sounder, or AIRS instrument, on NASA’s Aqua satellite, shows how it was distributed around the globe during May in the troposphere, the part of the atmosphere where most weather happens. Tom Yulsman, Discover Magazine, 27 Sep. 2013 There are so many mysteries in the Earth’s atmosphere between the troposphere and the ionosphere, which beg for inquisitive minds. Phil Plait, Discover Magazine, 15 Aug. 2012 The mesosphere, about 31 to 50 miles (50 to 80 kilometers) above Earth’s surface, is above the troposphere and stratosphere and beneath two other layers. Ashley Strickland, CNN, 3 Nov. 2022 The troposphere is where weather happens, and where eye-searing clouds of smoke and soot circulate even from moderately sized fires. Tribune News Service, oregonlive, 6 Aug. 2022 The troposphere is where weather happens, and where eye-searing clouds of smoke and soot circulate even from moderately sized fires. Tribune News Service, oregonlive, 6 Aug. 2022 The troposphere is where weather happens, and where eye-searing clouds of smoke and soot circulate even from moderately sized fires. Tribune News Service, oregonlive, 6 Aug. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'troposphere.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

Etymology

borrowed from French troposphère, from tropo- tropo- (in sense "change," as the troposphere is where weather changes take place) + -sphère -sphere

Note: The term was introduced, along with stratosphère stratosphere, by the French meteorologist Léon Tesserenc de Bort (1855-1913). Tesserenc de Bort apparently first used them in a paper read to a German meteorological society in Hamburg on September 30, 1908 ("La division de l'atmosphère en troposphère et stratosphère d'après les résultats de l'exploration de la haute atmosphère"). The paper was not subsequently published but is briefly summarized by C. Kassner in "Bericht über die elfte allgemeine Versammlung und Feier des 25-jährigen Bestehens der Deutschen Meteorologischen Gesellschaft zu Hamburg am 28. bis 30. September 1908," Meteorologische Zeitschrift, Band 26, Heft 1 (Januar, 1909), p. 6.

First Known Use

1908, in the meaning defined above

Time Traveler
The first known use of troposphere was in 1908

Dictionary Entries Near troposphere

Cite this Entry

“Troposphere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/troposphere. Accessed 8 Feb. 2023.

Kids Definition

troposphere

noun
tro·​po·​sphere ˈtrōp-ə-ˌsfi(ə)r How to pronounce troposphere (audio) ˈträp- How to pronounce troposphere (audio)
: the portion of the atmosphere which extends from the earth's surface to the bottom of the stratosphere and in which temperature generally decreases rapidly with altitude
tropospheric
ˌtrōp-ə-ˈsfi(ə)r-ik How to pronounce troposphere (audio)
ˌträp-
-ˈsfer-
adjective

More from Merriam-Webster on troposphere

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