upper air

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noun Meteorology.

the atmosphere above the lower portion of the troposphere.

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Origin of upper air

First recorded in 1875–80

Researchers were watching on November 17 to see if tiny meteorites burning up in the atmosphere were seeding the thin upper air with sodium atoms.
Scientists discover likely source of the moon’s faint yellow tail|Sid Perkins|May 3, 2021|Science News For Students
And Air Force assessors are the first to say such imaging never tells the whole story.
Pentagon Doesn’t Know How Many People It’s Killed in the ISIS War|Nancy A. Youssef|January 7, 2015|DAILY BEAST
Sprawled on chaise lounges with their knees high in the air and their legs spread wide.
Powerful Congressman Writes About ‘Fleshy Breasts’|Asawin Suebsaeng|January 7, 2015|DAILY BEAST
Indeed, Lion Air, with 45 percent of the domestic Indonesian airline market, has swallowed the Fernandes formula whole.
Annoying Airport Delays Might Prevent You From Becoming the Next AirAsia 8501|Clive Irving|January 6, 2015|DAILY BEAST

There is a larger reason, beyond the airlines themselves, why Lion Air and 61 other Indonesian airlines are on this black list.
Annoying Airport Delays Might Prevent You From Becoming the Next AirAsia 8501|Clive Irving|January 6, 2015|DAILY BEAST
The Pentagon said Faal served in the Air Force for seven years, during which time he became a U.S. citizen.
The Shadowy U.S. Veteran Who Tried to Overthrow a Country|Jacob Siegel|January 6, 2015|DAILY BEAST
“Perhaps you do not speak my language,” she said in Urdu, the tongue most frequently heard in Upper India.
The Red Year|Louis Tracy
On the upper part of the stem the whorls are very close together, but they are more widely separated at the lower portion.
How to Know the Ferns|S. Leonard Bastin
Bells were pealing and tolling in all directions, and the air was filled with the sound of distant shouts and cries.
Davy and The Goblin|Charles E. Carryl
It is to be remembered, however, that a few of these bacteria may reach the sputum from the upper air-passages.
A Manual of Clinical Diagnosis|James Campbell Todd
We had now approached closely to the foot of the mountain-ranges, and their lofty summits were high above us in mid-air.
Blackwood's Edinburgh Magazine, Volume 60, No. 372, October 1846|Various