The Madden-Julian Oscillation is a 30-50 day wave of periodic rainfall enhancement over the Australian tropics signalling a burst in monsoon activity during the tropical wet season.



Related Terms

MJO

The Madden-Julian Oscillation is a 30-50 day wave of periodic rainfall enhancement over the Australian tropics signalling a burst in monsoon activity during the tropical wet season.

M.J.O.

The Madden-Julian Oscillation is a 30-50 day wave of periodic rainfall enhancement over the Australian tropics signalling a burst in monsoon activity during the tropical wet season.

STATIONARY WAVE

A wave that oscillates without progressing. One-half of such a wave may be illustrated by the oscillation of the water in a pan that has been tilted. Near the axis, which is called the node or nodal line, there is no vertical rise and fall of the water. The ends of the wave are called loops and at these places the vertical rise and fall is at a maximum. The current is maximum near the node and minimum at the loops. The period of a stationary wave depends upon the length and depth of the body of water. A stationary wave may be resolved into two progressive waves of equal amplitude and equal speeds moving in opposite directions. Also called STANDING WAVE.

ACOUSTIC-WAVE-BASED SENSOR

A device that employs a surface acoustic wave, a thickness-shear-mode resonance (a resonant oscillation of a thin plate of material), or other type of acoustic wave to measure the physical properties of a thin film or liquid layer or, in combination with chemically sensitive thin films, to detect the presence and concentration of chemical analytes.

FRONTAL CYCLONE

In general, any cyclone associated with a front; often used synonymously with WAVE CYCLONE or with EXTRATROPICAL CYCLONE (as opposed to tropical cyclones, which are non-frontal).

WHITECAPS

Foam or spray on wave tops caused by stronger winds (usually above force 4).

FOLLOWING SEA

Wave or tidal movement going in the same direction as a ship

BEAM SEA

A sea condition where waves are moving perpendicular to the direction a ship is moving

ROGUE WAVE

A surprisingly large wave for a given sea state; formally, a wave whose height is more than twice the significant wave height (i.e., the mean of the largest third of waves in a wave record).

COMBER

A long, curving wave breaking on the shore.

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