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ionosphere    音標拼音: [ɑɪj'ɑnəsfir] [ɑɪ'ɑnəsfir]
n. 電離層

電離層

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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英文字典中文字典相關資料:
  • 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 | 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
  • ionosphere and magnetosphere - Encyclopedia Britannica
    In the upper regions of the ionosphere, beginning several hundred kilometres above Earth’s surface and extending tens of thousands of kilometres into space, is the magnetosphere, a region where the behaviour of charged particles is strongly affected by the magnetic fields of Earth and the Sun
  • 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?) - Live Science
    Earth's ionosphere, a region of charged particles, stretches up to the border between Earth and space (Image credit: NASA's Goddard Space Flight Center, Duberstein) The scorching-hot surface of
  • 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 )
  • 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
  • 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
  • Nudging Earth’s Ionosphere Helps Us Learn More About It
    Source: Radio Science Between 50 and 1,000 kilometers above our heads is the ionosphere, a layer of Earth’s upper atmosphere consisting of charged particles: ions (atoms that have gained or lost





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