Surface Pressure

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surface pressure

[′sər·fəs ‚presh·ər]
The atmospheric pressure at a given location on the earth's surface; the expression is applied loosely and about equally to the more specific terms: station pressure and sea-level pressure.

Surface Pressure


a force acting on a unit of length of the barrier separating the pure surface of a liquid and the surface of the same liquid covered with an adsorption layer of a surfactant. Surface pressure has a molecular kinetic nature; it is directed toward the pure surface and is determined by the difference in surface tensions of the pure liquid and of the liquid with an adsorption monolayer.

References in periodicals archive ?
As the temperatures fall and the air becomes dense, the surface pressure rises.
s]) is the (saturated) vapor pressure, q the specific humidity, p * the surface pressure, and RH the relative humidity near the surface.
The petroleum-collecting reagent spontaneously spreads and creates surface pressure.
The rains, which will reach their peak on Tuesday, are a result of low surface pressure arriving from Europe which will be focused over the eastern Mediterranean region, the Meteorological Department's Abdulazeez Al-Qarawi told KUNA.
KOP Surface Products is a provider of advanced surface pressure control technologies, systems and services.
Ambient surface pressure is about 90 Earth atmospheres, 'Space News' reported.
A detailed three-dimensional surface pressure distribution has been provided experimentally, as well as the database comprising the drag and lift aerodynamic forces, i.
Unsteady factors, including turbulence or gusts of wind, may cause surface pressure fluctuations of the building.
He thinks that during the most recent seasonal extreme, the airmass enveloping Pluto reached a peak surface pressure of anywhere from 18 millibars (three times that on Mars) to 280 millibars (more than 25% of sea-level pressure on Earth), depending on the surface's reflectivity and other assumptions.
It is considered as the first transitional month characterised by different surface pressure systems that lead to rapid changes in weather conditions.
Therefore, worse oil film formation as the engine bearing surface pressure increases is likely to be a one of key issue for reliability.
The main contribution to the large annual variability in surface pressure shown in Fig.

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