Anticyclogenesis is the development or strengthening of an
anticyclonic circulation in the atmosphere. It is the opposite of
anticyclolysis (the dissolution or weakening of an
anticyclone
An anticyclone is a weather phenomenon defined as a large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere as viewed from ...
) and has a
cyclonic equivalent known as
cyclogenesis
Cyclogenesis is the development or strengthening of cyclonic circulation in the atmosphere (a low-pressure area). Cyclogenesis is an umbrella term for at least three different processes, all of which result in the development of some sort of cycl ...
.
Anticyclones are alternatively referred to as
high pressure systems
A high-pressure area, high, or anticyclone, is an area near the surface of a planet where the atmospheric pressure is greater than the pressure in the surrounding regions. Highs are middle-scale meteorological features that result from interpl ...
.
Process
High-pressure systems form due to downward motion through the
troposphere
The troposphere is the first and lowest layer of the atmosphere of the Earth, and contains 75% of the total mass of the planetary atmosphere, 99% of the total mass of water vapour and aerosols, and is where most weather phenomena occur. Fro ...
, the
atmospheric
An atmosphere () is a layer of gas or layers of gases that envelop a planet, and is held in place by the gravity of the planetary body. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. A ...
layer where
weather
Weather is the state of the atmosphere, describing for example the degree to which it is hot or cold, wet or dry, calm or stormy, clear or cloudy. On Earth, most weather phenomena occur in the lowest layer of the planet's atmosphere, the ...
occurs. Preferred areas within a
synoptic flow pattern in higher levels of the troposphere are beneath the western side of troughs. On weather maps, these areas show converging winds (isotachs), also known as
confluence
In geography, a confluence (also: ''conflux'') occurs where two or more flowing bodies of water join to form a single channel. A confluence can occur in several configurations: at the point where a tributary joins a larger river (main stem); o ...
, or converging height lines near or above the level of non-divergence, which is near the 500 hPa pressure surface about midway up through the troposphere.
[Glossary of Meteorology (2009)]
Level of nondivergence.
American Meteorological Society
The American Meteorological Society (AMS) is the premier scientific and professional organization in the United States promoting and disseminating information about the atmospheric, oceanic, and hydrologic sciences. Its mission is to advance th ...
. Retrieved on 2009-02-17.[Konstantin Matchev (2009)]
Middle-Latitude Cyclones - II.
University of Florida
The University of Florida (Florida or UF) is a public land-grant research university in Gainesville, Florida. It is a senior member of the State University System of Florida, traces its origins to 1853, and has operated continuously on its ...
. Retrieved on 2009-02-16. On weather maps, high-pressure centers are associated with the letter H
[Keith C. Heidorn (2005)]
Weather's Highs and Lows: Part 1 The High.
The Weather Doctor. Retrieved on 2009-02-16. placed within the
isobar with the highest pressure value. On constant pressure upper level charts, it is located within the highest height line contour.
[Glossary of Meteorology (2009)]
High.
American Meteorological Society
The American Meteorological Society (AMS) is the premier scientific and professional organization in the United States promoting and disseminating information about the atmospheric, oceanic, and hydrologic sciences. Its mission is to advance th ...
. Retrieved on 2009-02-16.
See also
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References
{{reflist
Atmospheric dynamics
Meteorological phenomena
Synoptic meteorology and weather