1. Grunt Productions 2008
Anticyclone pressureAnticyclone pressure
systemssystems
A Brief By Lance GrindleyA Brief By Lance Grindley

2. Grunt Productions 2008
CycloneCyclone
► characterized by rapidcharacterized by rapid
inward circulation of airinward circulation of air
masses about a low-masses about a low-
pressure center,pressure center,
► accompanied by stormy,accompanied by stormy,
destructive weather.destructive weather.
► counterclockwise in thecounterclockwise in the
Northern Hemisphere andNorthern Hemisphere and
clockwise in the Southernclockwise in the Southern
Hemisphere.Hemisphere.

3. Grunt Productions 2008
AnticycloneAnticyclone
► A region of relativelyA region of relatively
highhigh
atmospheric pressureatmospheric pressure
► thousands of kilometersthousands of kilometers
in diameter.in diameter.
► appear on weatherappear on weather
charts as a series ofcharts as a series of
concentric, widelyconcentric, widely
spaced isobars of 1000 spaced isobars of 1000
mbs and above.mbs and above.
► clockwise in theclockwise in the
Northern Hemisphere,Northern Hemisphere,
andand
► anticlockwise in theanticlockwise in the
SouthernSouthern
► also known as a high.also known as a high.

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NORTHERN HEMISPHERE

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Weather in AnticyclonesWeather in Anticyclones
►Varies from place to placeVaries from place to place

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Weather inWeather in
Cold anticyclonesCold anticyclones
► also known asalso known as
continental highscontinental highs
► Siberia and north-westSiberia and north-west
Canada in winterCanada in winter
► Cool airCool air

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Weather in SubtropicalWeather in Subtropical
anticyclonesanticyclones
► stable atmosphericstable atmospheric
conditions, and thus,conditions, and thus,
► fine,fine,
► hot,hot,
► dry weather.dry weather.
► Strongest at 32°Strongest at 32°
N and S.N and S.

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WeatherWeather
mid-latitudemid-latitude anticyclonesanticyclones
► located beneath thelocated beneath the
leading edge of ridgesleading edge of ridges
in the upper-airin the upper-air
westerlieswesterlies
► the weather isthe weather is
unusually fineunusually fine

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Winter anticyclonesWinter anticyclones
► may bring cold,may bring cold,
► frosty weather,frosty weather,
► or fog.or fog.

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