trough
trough
1. An extension of low atmospheric pressure from the central regions of a low-pressure system into a zone where generally higher pressure prevails.
2. A meander towards the equator in the flow of the upper westerly winds over middle latitudes. (The ‘equatorial trough’, where trade winds meet, is synonymous with the intertropical convergence zone’.)
1. An extension of low atmospheric pressure from the central regions of a low-pressure system into a zone where generally higher pressure prevails.
2. A meander towards the equator in the flow of the upper westerly winds over middle latitudes. (The ‘equatorial trough’, where trade winds meet, is synonymous with the intertropical convergence zone’.)
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trough
