Doldrums: Difference between revisions

The '''doldrums''' is a colloquial expression derived from historical [[sea|maritime]] usage for those parts of the [[Atlantic Ocean]] and the [[Pacific Ocean]] affected by the [[Intertropical Convergence Zone]], a low-pressure area around the [[equator]] where the [[prevailing winds]] are calm. The low pressure is caused by the heat at the equator, which makes the air rise and travel north and south high in the atmosphere, until it subsides again in the [[horse latitudes]]. Some of that air returns to the doldrums through the [[trade winds]]. This process can lead to light or variable winds and more severe weather, in the form of squalls, thunderstorms and hurricanes. The doldrums are also noted for calm periods when the winds disappear altogether, trapping sailing sail-powered boats for periods of days or weeks.

When the winds are gone the sea actually has no swells, on a clear day the color of the sky is reflected in the water. At night the same effect, with no clouds or moon, gives youone the effect of floating in space.{{citation needed|date = November 2011}}