A direct cell oriented along the equator; originally used by Bjerknes (1969) to refer to the cell induced by the contrast between the warm waters of the western Pacific and the cooler waters of the ea [..]

Direct thermally driven zonal overturning circulation in the atmosphere over the tropical Pacific Ocean, with rising air in the western and sinking air in the eastern Pacific.

The Walker circulation is a zonal convection loop in the equatorial regions. In the Pacific, it is associated with ascendance over the warm Western Pacific, subsidence over the cold East Pacific, east [..]

An east-west circulation of the atmosphere above the tropical Pacific, with air rising above warmer ocean regions (normally in the west), and descending over the cooler ocean areas (normally in the east). Its strength fluctuates with that of the Southern Oscillation.

A vast, loop-shaped circulation pattern spanning the tropical Pacific, with rising air in the western tropical Pacific, sinking air in the eastern tropical Pacific, west-to-east winds a few miles high [..]

A deep east-west overturning in the atmosphere normally confined to within about 20 degrees latitude of the equator extending from low-levels to near the tropopause.

A deep east-west overturning in the atmosphere normally confined to within about 20 degrees latitude of the equator

A deep east-west overturning in the atmosphere normally confined to within about 20 degrees latitude of the equator extending from low-levels to near the tropopause. One side of the Walker Circulation is associated with rising motion, clouds, and rain while the opposite side with sinking motion, generally fair weather and little or no rain. This ci [..]