upper atmosphere

American  

noun

Meteorology.

1. the portion of the atmosphere above the troposphere.

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upper atmosphere British  

noun

1. meteorol that part of the atmosphere above the troposphere

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upper atmosphere Scientific  

1. The part of the atmosphere above the troposphere. The upper atmosphere includes the mesosphere, the ionosphere, the thermosphere, and the exosphere. Temperatures in the upper atmosphere decrease with increasing altitude except in the thermosphere, where temperatures increase significantly with altitude, because the few molecules present receive intense solar radiation.

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Etymology

Origin of upper atmosphere

First recorded in 1890–95

Example Sentences

About an hour after the superstorm arrived, charged particles surged through Earth's upper atmosphere at high latitudes and flowed toward the polar cap.

From Science Daily

The pair — nicknamed Blue and Gold after the university’s colors — will map the magnetic fields, upper atmosphere and ionosphere of Mars in 3D, gathering data that will help humans land or even settle on the Red Planet.

From MarketWatch

The satellites will map the magnetic fields, upper atmosphere and ionosphere of Mars in 3D, gathering data that will help humans land or even settle on the Red Planet.

From MarketWatch

This experimental concept aims to cool the planet by releasing reflective particles into the upper atmosphere, mimicking the temporary cooling that occurs after large volcanic eruptions.

From Science Daily

An idea once dismissed as science fiction -- cooling Earth by scattering sunlight-reflecting particles into the upper atmosphere -- is now being taken seriously by researchers.

From Science Daily