red sprites

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Definition

Noun: 1. A type of upper-atmospheric optical phenomenon: "Red sprites" are large-scale, brief electrical discharges that occur high above thunderstorm clouds. They are not lightning strikes to the ground, but rather upward-reaching flashes. 2. Characteristic appearance: They are characterized by their red color (which can range from pink to blood-red) and their globular, jellyfish- or carrot-like shapes. They appear at altitudes of approximately 50-90 kilometers (30-60 miles).

Usage
  • "Red sprites" is a plural noun used to describe this specific meteorological event. The singular form "red sprite" is used when referring to a single instance.
  • It is a technical term used in meteorology and atmospheric science, but is also common in astronomy and photography communities interested in rare sky phenomena.
Examples
  • The research aircraft captured stunning video of red sprites dancing above the massive storm system.
  • A red sprite was photographed over the Great Plains, appearing as a faint red flash lasting only a few milliseconds.
  • Scientists study red sprites to better understand the electrical properties of the mesosphere.
Advanced Usage
  • "Sprite" alone: In atmospheric science, the term "sprite" is commonly used as a shorthand for "red sprite," though blue jets and elves are other types of Transient Luminous Events (TLEs).
  • In conjunction with other TLEs: Red sprites are sometimes mentioned alongside "elves," which are another type of upper-atmospheric flash that appears as a dim, expanding ring of light.
    • Example: The satellite observed a cluster of red sprites accompanied by elves.
Variants and Related Words
  • Sprite (n): The shortened, more general term for this class of phenomenon.
  • Transient Luminous Event (TLE) (n): The broad scientific category that includes red sprites, blue jets, and elves.
  • Upper-atmospheric lightning (n): A descriptive, non-technical term sometimes used for sprites and related events.
  • Mesospheric lightning (n): A more specific term noting the altitude layer (mesosphere) where sprites occur.
Synonyms
  • Upper-atmospheric discharge: A descriptive synonym emphasizing the electrical nature and high altitude.
  • TLE (Transient Luminous Event): The formal categorical term, though it is broader than just red sprites.
Related Phrases / Collocations
  • To capture a red sprite: To photograph or record a red sprite.
    • Example: It is very difficult to capture a red sprite with standard video equipment.
  • Sprite activity: Refers to the occurrence or frequency of sprites.
    • Example: Sprite activity increases during large, organized thunderstorm complexes.
  • Sprite season: A casual term for periods (often spring/summer) when atmospheric conditions are more favorable for observing sprites.
    • Example: Storm chasers look forward to sprite season.
Noun
  1. atmospheric electricity (lasting 10 msec) appearing as globular flashes of red (pink to blood-red) light rising to heights of 60 miles (sometimes seen together with elves)

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