frontal zone

frontal zone

[′frənt·əl ‚zōn]
(meteorology)
The three-dimensional zone or layer of large horizontal density gradient, bounded by frontal surfaces and surface front.

frontal zone

A front or zone with a marked increase of density gradient. It is not truly a surface of discontinuity but rather a zone of rapid transition of meteorological elements.
References in periodicals archive ?
The Met Office's chief forecaster said: "A depression is expected to deepen and move towards Iceland during Friday, with the associated frontal zone expected to affect the UK throughout Friday and Saturday.
The rain warning for today says: "A frontal zone will affect Wales at times through Thursday.
Near record 24-hour rain amounts came from storms generated in an unstable frontal zone lying across northern Illinois.
This observing system will allow us to visualize and analyze the evolution of a complex frontal zone in a completely new way," said Al Plueddemann, a WHO1 physical oceanographer who will serve as project scientist for the Pioneer Array.
The event did grow out of an old frontal zone as will also be demonstrated.
Jeanne merged with a frontal zone and became extratropical on September 29 while moving eastward from the mid-Atlantic coast.
Miller, who studies leptocephali from species other than the Japanese eel, pointed out that his catches of non-Anguilla leptocephali seemed to concentrate south of a frontal zone -- a region where salinity changes quite rapidly.
A frontal zone is expected to move into Wales from the west early today and become slow-moving for at least 24 hours, possibly longer.
Standard analyses reveal the presence of an 850 mb frontal zone, broad southwesterly flow at 500 mb, and the right entrance region of an anticyclonically curved jet streak at 250 mb all over the region at the time of the event.
Coastal shelf areas and the likes of the Humboldt Current, the Patagonian Shelf, the Antarctic Polar Frontal Zone and the Benguela Current are also seen as important for albatrosses and petrels while breeding.
The use of EEG spectral analysis revealed that in frontal zones, there was greater left hemisphere activation or positive emotional reactions (e.