Atmospheric transfers Flashcards
Two main influences on atmospheric transfer:
- pressure variations
- ocean currents
A decline in pressure indicates…
rainy, windy and stormy weather.
In the northern hemisphere at cyclonic conditions the air…
converges at ground level, warms up, rises and cools in an anticlockwise direction, which creates an area of low pressure.
In the northern hemisphere at anticyclonic conditions the air…
diverges at ground level in a clockwise direction, as the air is cool dense, therefore sinks. Area of high pressure.
ITCZ stands for…
Inter-Tropical Convergence Zone and it is the thermal equator which migrates depending on the tilt of the Earth.
In June the ITCZ lies in…
the Northern hemisphere and in December it is in Southern. The greatest movement is over Asia due to a large land mass.
Spring Equinox is…
22/23 March (ITCZ at the equator)
Autumn Equinox is…
22/23 September (ITCZ at the equator)
Low latitude winds are mostly…
easterlies, as they flow towards the west. Reliable trade winds as they blow over 30% of the earth’s surface.
Elevation greatly impacts the surface wind…
speed and the direction.
Strongest winds are at…
the ITCZ.
Albedo affects the high…
pressure areas.
Monsoon means…
reverse. Caused by the reversal of sea and land temperature, so winds blow in the opposite direction.
