AntiCyclones Youtube Lecture Handouts

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AntiCyclones Youtube - Lecture - Handouts

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AntiCyclones Image

AntiCyclones Image

AntiCyclones Image

AntiCyclones Table
AntiCyclones Table

Features

Cold Anticyclone

Warm Anticyclone

Characteristics

Shallow & extends upto 23 km

Deep, slow moving & associated with blocking in higher latitudes

Origin

Persistent radiational cooling of land surface & cold overlying atmosphere

Convergence in upper troposphere with subsidence beneath

Intensity

Decreases with height

Increases with height

Regions of Formation

High latitude continental interiors e.g. Siberia

Subtropical belt latitude e.g. Bermuda, Greenland, North Canada etc.

Troposphere Temperature

Colder

Warmer

Tropopause Pressure

Lower

Higher

Stratosphere Temperature

Warmer

Colder

Persistence

More immobile & less persistence

Persist for days, weeks, & even months

Anticyclone to Cyclone

Anticyclone to Cyclone Image

Anticyclone to Cyclone Image

Anticyclone to Cyclone Image

Anticyclone to Cyclone Table
Anticyclone to Cyclone Table

Features

Anticyclone

Cyclone

Surface pressure

High

Low

Air flow

Diverges at surface

Converges at surface

Vertical air motion

Subsides

Rises

Wind speed

Weak

Moderate to strong

Precipitation

Generally dry

Wet

Cloudiness

No clouds or stratus clouds

Nimbostratus or cumulonimbus clouds

Stability

Stable air with no subsidence

May be unstable

Temperature

gradient

Little temperature contrast

across high

Strong temperature contrasts at fronts

Speed of movement

Slow moving or stagnant

Generally mobile, moves west-east