Large-scale atmospheric processes (circulation) Atmospheric processes with a representative scale (large-scale) of 10 000 km. In meteorology, it is a scale in which the curve of the Earth is not negligible.
Large-scale atmospheric circulations affecting our climate
Climate Variability and El Niño
El Niño is one of the major climate influences in the world and the most important one in Australia.
Large-scale - See synoptic-scale.
Left Front Quadrant (or Left Exit Region) - The area downstream from and to the left of an upper-level jet max (as would be viewed looking along the direction of flow).
Large-scale See synoptic-scale.
LCD (Local Climatological Data) This National Climatic Data Center (NCDC) publication is produced monthly and annually for some 270 United States cities and its territories.
large-scale convection"Organized vertical motion on a larger scale than atmospheric free convection associated with cumulus clouds. The patterns of vertical motion in hurricanes or in migratory cyclones are examples of such convection.
Large-scale atmospheric flow in which the east-west component (i.e., latitudinal) is dominant. The accompanying meridional (north-south) component often is weaker than normal. Compare with meridional flow.
Zone of Aeration ...
A large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the Northern Hemisphere, counterclockwise in the Southern Hemisphere
Anticyclonic Rotation ...
The large-scale circulation of the Earth's atmosphere is driven by the difference in absorbed solar radiation per square meter, as the sun heats the Earth more in the Tropics, mostly because of geometrical factors.
Cyclone: a large-scale circulation of winds around a central region of low atmospheric pressure, counterclockwise in the Northern Hemisphere, clockwise in the Southern Hemisphere.
D
Day length: duration of the period from sunrise to sunset.
The NAO is a large-scale fluctuation in atmospheric pressure between the subtropical high-pressure systems located near the Azores in the Atlantic Ocean and the sub-polar low-pressure system near Iceland and is quantified in the NAO Index.
The totality of large-scale organized motion for the entire global atmosphere.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Global Temperature Change, Global Warming, Lapse rate, Rocketsonde, Tropopause ...
Zonal Flow: Large-scale atmospheric flow in which the east-west component, i.e., flow parallel to the latitude lines, is much greater than the meridional (north-south) component. Compare with meridional flow.
Zonal Flow - Large-scale atmospheric flow in which the east-west component (i.e., latitudinal) is dominant. The accompanying meridional (north-south) component often is weaker than normal.
A way to guess the large-scale 2-dimensional winds, divergence and fall speeds from one-dimensional radial velocity data. Essentially a multivariate regression which fits a simple wind model to the observed radial velocities.
GEMPAKGeneral Environmental Meteorological Package (programming language)GENGeneralGeneral CirculationThe totality of large-scale organized motion for the entire global atmosphere.
advective tendencyThe large-scale advective tendency of temperature and moisture used to force SCMs and CSRMs, derived from constrained variational analysis.aerosolA system of colloidal particles dispersed in a gas (e.g., smoke or fog).
advection The predominately horizontal large-scale movement of air that causes changes in temperature or other physical properties. In oceanography, advection is the horizontal or vertical flow of sea water as a current.
Volume Velocity ProcessingA way to guess the large-scale 2-dimensional winds, divergence and fall speeds from one-dimensional radial velocity data.
Mountain-Plain Wind SystemA closed, large-scale, thermally driven circulation between the mountains and the surrounding plain.
Carrington LongitudeA system of fixed longitudes rotating with the sunCatalina EddyA Catalina Eddy (coastal eddy) forms when upper level large-scale flow off Point Conception interacts with the complex topography of the Southern California ...
Distinction is made between free convection (gravitational or buoyant convection), motion caused only by density differences within the fluid; and forced convection, motion induced by mechanical forces such as deflection by a large-scale surface ...
Upper Level SystemA general term for any large-scale or mesoscale disturbance capable of producing upward motion (lift) in the middle or upper parts of the atmosphere. This term sometimes is used interchangeably with impulse or shortwave.
The large-scale forces must have been predominately geostrophic, because hurricanes blow clockwise in the southern hemisphere, but cyclostrophic forces predominated at the centre of the vortex.
A general term for any large-scale or mesoscale disturbance capable of producing upward motion (lift) in the middle or upper parts of the atmosphere. This term is sometimes used interchangeably with impulse or shortwave.
Upslope flow ...
Movement over a land-mass will weaken hurricane winds but will result in large-scale rain that can result in large-scale flooding.
Analogue method of forecasting A forecast made by comparison of past large-scale synoptic weather patterns that resemble a given (usually current) situation in its essential characteristics.
(NB: Forced ascent comes about in several ways: frontal ascent due to large-scale air motion within frontal systems, with of course adjacent descent; ...
EXTRATROPICAL - Simply means not in the tropics. Usually applied to large-scale storm systems that originate in mid and upper latitude regions, such as frontal systems.
ENSO (El NiZo/Southern Oscillation) An episode of anomalously high sea-surface temperatures in the equatorial and tropical eastern Pacific; associated with large-scale swings in surface air pressure between the western and central tropical ...
zonal wind—A west wind; the westerly component of a wind. Conventionally used to describe large-scale flow that is neither cyclonic nor anticyclonic.
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can cover the entire sky and be up to several thousand feet thick, they are relatively transparent, as the sun or the moon can easily be seen through them. These high-level clouds typically form when a broad layer of air is lifted by large-scale ...
 See also: Air, Atmosphere, Water, Weather, High
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