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Encyclopedia > Synoptic scale meteorology


The synoptic scale in meteorology (also known as large scale or cyclonic scale) is a horizontal length scale of the order of 1000 kilometres (about 620 miles) or more [1]. This corresponds to a horizontal scale typical of mid-latitude depressions. Most high and low pressure areas seen on weather maps are synoptic-scale systems. The word synoptic is derived from the Greek word sunoptikos meaning seen together. Satellite image of Hurricane Hugo with a polar low visible at the top of the image. ... It has been suggested that this article or section be merged into cyclone. ... The use of water pressure - the Captain Cook Memorial Jet in Lake Burley Griffin, Canberra. ...


The Navier-Stokes equations applied to atmospheric motion can be simplified by scale analysis in the synoptic scale. It can be shown that main terms in horizontal equations are Coriolis force and pressure gradient terms; therefore, one can use geostrophic approximation. In vertical coordinate momentum equation simplifies to hydrostatic equilibrium equation. The Navier-Stokes equations, named after Claude-Louis Navier and George Gabriel Stokes, are a set of equations that describe the motion of fluid substances such as liquids and gases. ... Scale analysis is a powerful tool used in the mathematical sciences for the simplification of equations with many terms. ... In the inertial frame of reference (upper part of the picture), the black object moves in a straight line. ... Pressure Gradient is the change in pressure over a distance. ... The geostrophic wind is defined as the wind resulting from the balance between the Coriolis force and the pressure gradient force. ... Hydrostatic equilibrium occurs when compression due to gravity is balanced by a pressure gradient which creates a pressure gradient force in the opposite direction. ...


External links

  • http://amsglossary.allenpress.com/glossary/search?p=1&query=synoptic Definition of synoptic scale
  • http://nsidc.org/arcticmet/glossary/synoptic_meteorology.html Definition of synoptic meteorology
  • http://nsidc.org/arcticmet/glossary/synoptic_hour.html Definition of synoptic hours

Related articles


  Results from FactBites:
 
Synoptic - Search Results - MSN Encarta (293 words)
Meteorology, study of the earth’s atmosphere and especially the study of weather.
The Synoptic Gospels is a term used by modern New Testament scholars for the Gospels according to Matthew, Mark, and Luke of the New Testament in the Bible.
The synoptic scale in meteorology (also known as large scale or cyclonic scale) is a horizontal length scale of the order of 1000 kilometres (about 620 miles) or more.
AFC - Weather Glossary (5209 words)
a synoptic scale segment of troposphere whose temperature and humidity are usefully related to a geographical source region.
a swath of cloud and precipitation which is synoptic scale in length and at least large-mesoscale in breadth, and is associated with a significant horizontal temperature gradient in the low troposphere of an extratropical cyclone.
synoptic scale ascent and descent associated with extratropical cyclones and anticyclones.
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