zonal flow


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zonal flow

[′zōn·əl ′flō]
(meteorology)
The flow of air along a latitude circle; more specifically, the latitudinal (east or west) component of existing flow. Also known as zonal circulation.
References in periodicals archive ?
Contract award: Zonal flow meters and pressure reducers and playing with reinforcement works for specification.
above more ore less 16,000 feet) creating a very strong zonal flow from west to east.
At the surface stations, the meridional (southern) flow exceeds the zonal flow during the cold season (November-March).
9% compared to the high-low pressure system), followed by zonal flow (5.
The PNA significantly explains large-scale rainfall variability of the region, suggesting an increase in winter precipitation during the years with zonal flow across the United States.
Contract notice: Zonal flow meters and pressure reducers and playing with reinforcement works for specification.
Stronger high pressure cells dominate local weather conditions by pushing the opposing zonal flow from the Indian Ocean away to the east.
Since the high-pressure core stays strong, it exerts an influence for thousands of kilometers in a northerly direction, meeting the tropical zonal flow from the Indian Ocean and driving this in a very large curve across northern Mozambique, Zambia, the DRC and Angola.
This drives the zonal flow from the Indian Ocean, but it also restrict convection, thus limiting rainfall intensity.
The strong presence of the South Atlantic high pressure cell, and the marked zonal flow all the way from the Indian Ocean across Mozambique, Zambia, southern DRC and Angola into Namibia from the north created a trough (low pressure funnel) which brought heavy rains to the Zambezi, northern Botswana, Limpopo Province in SA, and further south across the eastern parts of South Africa.
A strong and persistent zonal flow from the core of the low pressure vortex in the Mozambican channel, across Zambia and Angola, brought an extensive inflow of moisture from the north east.
Chances of it approaching Namibia and entering our airspace are slim, but with the strong zonal flow east to west, i.