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ionosphere    音标拼音: [ɑɪj'ɑnəsfir] [ɑɪ'ɑnəsfir]
n. 电离层

电离层

ionosphere
n 1: the outer region of the Earth's atmosphere; contains a high
concentration of free electrons

ionosphere \ionosphere\ n.
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.
[WordNet 1.5 PJC]


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  • Ionosphere - Wikipedia
    The ionosphere is a shell of electrons and electrically charged atoms and molecules that surrounds the Earth, [18] stretching from a height of about 50 km (30 mi) to more than 1,000 km (600 mi) It exists primarily due to ultraviolet radiation from the Sun
  • 10 Things to Know About the Ionosphere - NASA Science
    The ionosphere stretches roughly 50 to 400 miles above Earth's surface, right at the edge of space Along with the neutral upper atmosphere, the ionosphere forms the boundary between Earth's lower atmosphere — where we live and breathe — and the vacuum of space
  • Ionosphere | NASA Space Place – NASA Science for Kids
    What is the ionosphere? The ionosphere is a very active part of the atmosphere, and it grows and shrinks depending on the energy it absorbs from the Sun The name ionosphere comes from the fact that gases in these layers are excited by solar radiation to form ions, which have an electrical charge
  • Ionosphere | NOAA NWS Space Weather Prediction Center
    The Ionosphere is part of Earth’s upper atmosphere, between 80 and about 600 km where Extreme UltraViolet (EUV) and x-ray solar radiation ionizes the atoms and molecules thus creating a layer of electrons
  • Revolutions in Understanding the Ionosphere, Earth’s Interface . . . - NASA
    Scientists from NASA and three universities have presented new discoveries about the way heat and energy move and manifest in the ionosphere, a region of Earth’s atmosphere that reacts to changes from both space above and Earth below
  • The Ionosphere - Center for Science Education
    Regions with higher concentrations of ions and free electrons occur at several different altitudes and are known, as a group, as the ionosphere There are three main regions of the ionosphere, called the D layer, the E layer, and the F layer
  • What is the ionosphere? (And who is Steve?) | Space
    A dense layer of molecules and electrically charged particles, called the ionosphere, hangs in the Earth's upper atmosphere starting at about 35 miles (60 kilometers) above the planet's surface
  • ionosphere and magnetosphere - Encyclopedia Britannica
    ionosphere and magnetosphere, regions of Earth’s atmosphere in which the number of electrically charged particles— ions and electrons—are large enough to affect the propagation of radio waves The charged particles are created by the action of extraterrestrial radiation (mainly from the Sun ) on neutral atoms and molecules of air
  • The Earths Ionosphere - Stanford University
    The ionosphere is defined as the layer of the Earth's atmosphere that is ionized by solar and cosmic radiation It lies 75-1000 km (46-621 miles) above the Earth (The Earth’s radius is 6370 km, so the thickness of the ionosphere is quite tiny compared with the size of Earth )
  • JetStream Max: The Ionosphere | National Oceanic and Atmospheric . . .
    The ionosphere is located within the thermosphere and extends from 37 to 190 miles (60-300 km) above the Earth's surface It is divided into three regions or layers: the F-Layer, E-Layer, and D-Layer





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