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
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