Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A region of the earth's atmosphere where ionization caused by incoming solar radiation affects the transmission of radio waves. It extends from a height of 70 kilometers (43 miles) to 400 kilometers (250 miles) above the surface.
from the GNU version of the Collaborative International Dictionary of English.
- noun the outer region of the earth's atmosphere, beyond which is the
exosphere ; it contains a high concentration of free electrons and ions, and extends from about 50 miles to about 250 miles above the earth's surface, but the height shows daily and seasonal variation, and the composition of the particles in the ionosphere is also affected by events such as solar flares.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun The part of the Earth's
atmosphere beginning at analtitude of about 50 kilometers (31 miles) and extending outward 500 kilometers (310 miles) or more. - noun The similar region of the atmosphere of another planet.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun the outer region of the Earth's atmosphere; contains a high concentration of free electrons
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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Nobel Prizeman himself, who gave me the warmest encouragement and help when I began to work on the ionosphere, is not alive today to let me hear his own words of approval.
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We have a diurnal pattern of a distribution of earthquakes controlled by a current in the ionosphere, which is controlled by the activity on the sun.
SETI Institute: Life at the SETI Institute: Friedemann Freund - The Future of Forecasting Earthquakes SETI Institute 2011
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We have a diurnal pattern of a distribution of earthquakes controlled by a current in the ionosphere, which is controlled by the activity on the sun.
SETI Institute: Life at the SETI Institute: Friedemann Freund - The Future of Forecasting Earthquakes SETI Institute 2011
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CFCs are also safe, inert and nonpoisonous-until they reach the ionosphere, that is.
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The ionosphere is a duo-layered crust of particles several miles thick holding the atmosphere in place.
Global Warming Creating Colder Winter Weather? 'Tis True 2007
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The ELF (extremely low frequency) resonator formed by the cavity between the Earth and the lower E-region of the ionosphere is a nature! resource, that will actually permit the terrestrial distribution of electrical power across a continent, without the necessity of an interconnecting land-line grid of high tension transmission lines.
Chapter 6 1990
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The ionosphere is the wayward child of the sun; even now, its behaviour is not always predictable.
The Fountains of Paradise Clarke, Arthur C. 1979
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This vast region, beginning at a height of approximately fifty kilometres and extending outwards for several radii of the Earth, is now known as the ionosphere; its exploration by rockets, satellites and radio waves has been a continuing process for more than two centuries.
The Fountains of Paradise Clarke, Arthur C. 1979
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No, son, the ionosphere is the ceiling until we think up something better than rockets.
The Past Through Tomorrow Heinlein, Robert A. 1967
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"The ionosphere is a region of the upper atmosphere where there are a significant number of charged particles," Mr. Pedersen said.
Signs of the Times 2010
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For the first time, researchers have used real-time data from around 40 million mobile phones to map conditions in the ionosphere — a region of the upper atmosphere in which some of the air molecules are ionized.
Google uses millions of phones to map Earth’s ionosphere and improve GPS Elizabeth Gibney 2024
reesetee commented on the word ionosphere
The region of the earth's atmosphere between the stratosphere and the exosphere.
August 1, 2007
chained_bear commented on the word ionosphere
Usage on Heaviside Layer.
July 7, 2009