isobar

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See also: Isobar and isòbar

English

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English Wikipedia has an article on:
Wikipedia
Isobar Map (PSF)

Alternative forms

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Etymology

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From Ancient Greek ἴσος (ísos, equal) βάρος (báros, weight), equivalent to iso- bar-.

Noun

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isobar (plural isobars)

  1. (meteorology) A line drawn on a map or chart connecting places of equal or constant pressure.
    Coordinate terms: isopleth, isohyet, isotherm
  2. (thermodynamics) A set of points or conditions at constant pressure.
  3. (nuclear physics) Either of two nuclides of different elements having the same mass number.

Usage notes

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  • (meteorology):
    In meteorology, the term isobar most often refers to a line drawn through connected points of equal atmospheric pressure on a given reference surface — such as a constant height surface (notably mean-sea-level on surface charts), the vertical plane of a synoptic cross section, or a layer of the air unaffected by surface heating or cooling. The pattern of isobars has always been a main feature of surface chart analysis. (See Surface weather analysis on Wikipedia.Wikipedia ) It was standard procedure to draw isobars at 3-millibar intervals until the recent advent of constant pressure charts for upper-air analysis brought about the use of 4-millibar intervals to simplify the conversion from surface isobars to 1,000-millibar contour lines.

Derived terms

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Translations

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See also

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Anagrams

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Danish

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Adjective

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isobar (neuter isobart, plural and definite singular attributive isobare)

  1. (thermodynamics) isobaric

German

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Pronunciation

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  • IPA(key): /izoˈbaːɐ̯/
  • Audio:(file)
  • Hyphenation: iso‧bar
  • Rhymes: -aːɐ̯

Adjective

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isobar (strong nominative masculine singular isobarer, not comparable)

  1. isobaric

Declension

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Further reading

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  • isobar” in Duden online
  • isobar” in Digitales Wörterbuch der deutschen Sprache