Definitions for THERMOSPHERE
ˈθɜr məˌsfɪərther·mo·spher·e

Princeton's WordNetRate this definition:1.0 / 1 vote

1. thermospherenoun

   the atmospheric layer between the mesosphere and the exosphere

WiktionaryRate this definition:1.0 / 1 vote

1. thermospherenoun

   layer of the Earth's atmosphere directly above the mesosphere and directly below the exosphere

WikipediaRate this definition:0.0 / 0 votes

1. Thermosphere

   The thermosphere is the layer in the Earth's atmosphere directly above the mesosphere and below the exosphere. Within this layer of the atmosphere, ultraviolet radiation causes photoionization/photodissociation of molecules, creating ions; the thermosphere thus constitutes the larger part of the ionosphere. Taking its name from the Greek θερμός (pronounced thermos) meaning heat, the thermosphere begins at about 80 km (50 mi) above sea level. At these high altitudes, the residual atmospheric gases sort into strata according to molecular mass (see turbosphere). Thermospheric temperatures increase with altitude due to absorption of highly energetic solar radiation. Temperatures are highly dependent on solar activity, and can rise to 2,000 °C (3,630 °F) or more. Radiation causes the atmospheric particles in this layer to become electrically charged, enabling radio waves to be refracted and thus be received beyond the horizon. In the exosphere, beginning at about 600 km (375 mi) above sea level, the atmosphere turns into space, although, by the judging criteria set for the definition of the Kármán line (100 km), most of the thermosphere is part of space. The border between the thermosphere and exosphere is known as the thermopause. The highly attenuated gas in this layer can reach 2,500 °C (4,530 °F) during the day. Despite the high temperature, an observer or object will experience low temperatures in the thermosphere, because the extremely low density of the gas (practically a hard vacuum) is insufficient for the molecules to conduct heat. A normal thermometer will read significantly below 0 °C (32 °F), at least at night, because the energy lost by thermal radiation would exceed the energy acquired from the atmospheric gas by direct contact. In the anacoustic zone above 160 kilometres (99 mi), the density is so low that molecular interactions are too infrequent to permit the transmission of sound. The dynamics of the thermosphere are dominated by atmospheric tides, which are driven predominantly by diurnal heating. Atmospheric waves dissipate above this level because of collisions between the neutral gas and the ionospheric plasma. The thermosphere is uninhabited with the exception of the International Space Station, which orbits the Earth within the middle of the thermosphere between 408 and 410 kilometres (254 and 255 mi) and the Tiangong space station, which orbits between 340 and 450 kilometres (210 and 280 mi).

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1. thermosphere

   The thermosphere is the fourth layer out of the five layers in the Earth's atmosphere, positioned above the mesosphere and below the exosphere. It is characterized by highly variable temperature, which can increase with altitude up to 2500°C due to solar radiation. The thermosphere is also the layer where phenomena such as the aurora borealis and aurora australis occur.

WikidataRate this definition:5.0 / 1 vote

1. Thermosphere

   The thermosphere is the layer of the Earth's atmosphere directly above the mesosphere and directly below the exosphere. Within this layer, ultraviolet radiation causes ionization. Called from the Greek θερμός meaning heat, the thermosphere begins about 85 kilometres above the Earth. At these high altitudes, the residual atmospheric gases sort into strata according to molecular mass. Thermospheric temperatures increase with altitude due to absorption of highly energetic solar radiation. Temperatures are highly dependent on solar activity, and can rise to 2,000 °C. Radiation causes the atmosphere particles in this layer to become electrically charged, enabling radio waves to bounce off and be received beyond the horizon. In the exosphere, beginning at 500 to 1,000 kilometres above the Earth's surface, the atmosphere turns into space. The highly diluted gas in this layer can reach 2,500 °C during the day. Even though the temperature is so high, one would not feel warm in the thermosphere, because it is so near vacuum that there is not enough contact with the few atoms of gas to transfer much heat. A normal thermometer would read significantly below 0 °C, because the energy lost by thermal radiation would exceed the energy acquired from the atmospheric gas by direct contact. In the anacoustic zone above 160 kilometres, the density is so low that molecular interactions are too infrequent to permit the transmission of sound.

Matched Categories

1. • Atmosphere
   • Layer

Usage in printed sourcesFrom: 

1. [["1895","6"],["1896","6"],["1898","1"],["1902","10"],["1905","5"],["1906","4"],["1909","1"],["1913","1"],["1917","1"],["1918","2"],["1927","2"],["1931","3"],["1933","2"],["1934","3"],["1936","3"],["1937","3"],["1946","24"],["1950","1"],["1952","2"],["1953","22"],["1954","32"],["1955","45"],["1956","41"],["1957","10"],["1958","46"],["1959","84"],["1960","513"],["1961","143"],["1962","165"],["1963","240"],["1964","129"],["1965","881"],["1966","249"],["1967","445"],["1968","322"],["1969","312"],["1970","400"],["1971","409"],["1972","769"],["1973","709"],["1974","244"],["1975","634"],["1976","453"],["1977","486"],["1978","230"],["1979","423"],["1980","336"],["1981","350"],["1982","533"],["1983","990"],["1984","395"],["1985","769"],["1986","628"],["1987","723"],["1988","346"],["1989","1606"],["1990","582"],["1991","789"],["1992","1451"],["1993","740"],["1994","872"],["1995","1926"],["1996","875"],["1997","1860"],["1998","772"],["1999","901"],["2000","892"],["2001","1491"],["2002","1311"],["2003","1216"],["2004","1354"],["2005","1255"],["2006","1063"],["2007","1220"],["2008","1081"]]

How to pronounce THERMOSPHERE?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say THERMOSPHERE in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of THERMOSPHERE in Chaldean Numerology is: 1

2. Pythagorean Numerology

   The numerical value of THERMOSPHERE in Pythagorean Numerology is: 6

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=THERMOSPHERE
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Thermosphere
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Thermosphere
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=THERMOSPHERE
6. ^ Usage in printed sources
   https://books.google.com/ngrams/graph?content=THERMOSPHERE