The trough line of a circular depression is the line, through the centre, perpendicular to the line of advance of the centre. During the passage of a depression over any given place the pressure at first falls and later rises; the trough line passes over the place during the period of transition from the falling to the rising barometer. The word trough is also used in a more general sense for any 'valley' of low pressure, and is thus the opposite of a 'ridge' of high pressure.
A long and broad submarine DEPRESSION with gently sloping sides.
The bottom of a wave, the valley between the crests.
The transition point between economic recession and recovery.
A long linear depression.
The part of a transverse wave that extends below (negative) the rest state of the medium. Click here to see a trough graphic. Back to Wave Index
the bottom of a transverse wave.
The lowest point in a propagating or standing wave. See low water and tidal wave.
The lowest period of a recession when economic activity is at its slowest.
The lowest part between waves.
the lowest point on the business cycle, from which the only way to go is up.
(or "U-shaped valley"): The steep-walled (though rarely vertical), broad-floored shape considered diagnostic of former mountain glaciation. Often contrasted to the "V" shape typical of mass wasting slopes feeding river systems.
a narrow depression (as in the earth or between ocean waves or in the ocean bed)
a great place to start finding gamefish and is most easily identified by the flattened wave action between the sandbars
the part of the ocean wave that is displaced below the still water line
The lowest level for a particular sound at a given point in time. Used when viewing the Wave mode Analyzer.
the lowest point of a wave.
The lowest point in a wave between crests.
A trough (of low pressure) is a pressure feature of the synoptic chart; it is characterized by a system of isobars which are concave towards a depression and have maximum curvature along the axis of the trough, or trough line. The trough is said to be deep or shallow, according as the maximum curvature of the isobars along the trough line is more or small, respectively, the former corresponds to the V shape referred to in the obsolete term 'v-shaped' depression.
The lowest part of the wave between successive crests.
The lowest point a transverse wave.
A long, narrow depression, as between waves or ridges.
The depression between two waves.
The peak of the negative alternation (maximum value below the line) of a sine wave.
the bottom of a recession
The lowest point of the wave. The trough is the opposite of the crest.
A trough is generally a steep-sided depression in the sub-surface that often contains thick sequences of hydrocarbon prospective rocks.
The trough of a wave is its lowest point.
The lowest point on the wave below the still-water line.
a long depression of the sea floor characteristically flat bottomed and steep sided, and normally shallower than a trench TRGU
a lengthy period of low business activity. Prices are low, purchasing power is cut, and unemployment is high. The Great Depression of the 1930's is an example of being in a trough stage
(wave) bottom part of wave.
Appears on weather maps as an extension from a depression.
In geology, a trough generally refers to a linear structural depression that extends laterally over a distance, while being less steep than a trench. A trough can be a narrow basin or a geologic rift. There are various oceanic troughs, troughs found under oceans; examples include the rift along the mid-oceanic ridge and the Cayman Trough.