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16 Cards in this Set
- Front
- Back
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1) Name the magnetopause boundary layer draped over the top and bottom of the magnetosphere.
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1. Mantle
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2) Identify the direction of current flow in the ring current.
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2. Westward around equator
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3) Identify the magnetotail region in which plasma streams along stretched closed magnetic field.
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3. Plasma Sheet Boundary Layer
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4) Identify the primary source of plasma in the plasmasphere.
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4. Ionosphere
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5) Identify the primary source of energetic particles in the inner radiation belt.
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5. Cosmic rays
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6) Identify the primary heat source for the stratosphere.
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6. Ozone EUV absorption
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7) Name the dominant process for ion loss in the ionosphere.
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7. Dissociative Recombination
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8) Identify the dominant interaction in the “closed” model of magnetospheric plasma circulation.
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8. Viscous Circulation
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9) Identify the magnetic index used to monitor auroral activity
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9. Auroral Electrojet
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10) Identify the two quantities that are in perfect balance at the location of the magnetopause.
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10. At the magnetopause, the inward dynamic pressure of the magnetosheath is in perfect balance with the outward magnetic pressure of the geomagnetic field
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11) Explain the configuration of the region-1 currents and identify what drives them.
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11. The region 1 field aligned currents are driven by the solar wind and IMF. They’re the highest latitude of the FACs. They close through the high latitude ionosphere, depositing energy via Aurora and Atmospheric Heating.
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12) Explain why the ionosphere is structured in layers.
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The ionosphere is structured in layers, defined by ion production. This ion production varies with altitude in the atmosphere by two ways: Strength of solar EUV radiation, and density of atmospheric molecules.
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13) Explain what happens to the ionosphere at night.
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13. During night, the D layer (lowest layer) disappears completely, while the F1 and F2 layers merge together.
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14) Name the two major systems of ionospheric current and identify what drives them.
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14. Solar quiet ionospheric currents occur at low latitude, for which solar heating acts as the dominant source for ionospheric current. There is also Disturbance polar type-2 currents, which are centered at the magnetic pole.
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15) Define aurora. Explain the difference between discrete and diffuse aurora.
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15. When the atmospheric molecules have been excited by collisions with charged particles entering the atmosphere from the magnetosphere, light is produced, which is the Aurora.
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16) What is the Dst magnetic index designed to measure?
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16. The disturbance storm-time index is designed to measure the strength of the ring current. It’s produced by averaging the north-south perturbations from four standard low-mid latitude magnetometers which are distributed evenly in longitude.
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