shallow water approximation"An approximation to the equations of motion whereby it is assumed that the fluid is homogeneous and horizontal scales of interest are much larger than the depth of the fluid. See shallow water wave.
Shallow Fog
Fog in which the visibility at 6 feet above ground level is 5/8ths statute mile or more and the apparent visibility in the fog layer is less than 5/8ths statute mile.
SHARS ...
Shallow water
Water depths less than or equal to one half of the wavelength of a wave. Therefore, water may be "shallow" for some waves, but not for others.
Shelf Wave ...
A shallow layer of fog formed when warmer water evaporates quickly into cold air and immediately condenses. e.g. "steam " coming out of a boiling kettle.
Atmosphere
The mass of air surrounding the Earth.
A shallow low pressure system caused by the strong heating of the earth's surface. These lows are usually weak and are strongest in the late afternoon. They can trigger afternoon or evening showers and thunderstorms.
Heat wave ...
A shallow downslope wind above the surface of a glacier, caused by the temperature difference between the air in contact with the glacier and the free air at the same altitude.
A shallow region at the top of a convective boundary layer where fluid is entrained into the growing boundary layer from the overlying fluid by the collapse of rising convective plumes or bubbles.
Entrance Region ...
Ground Fog - Shallow fog (less than twenty feet deep) produced over the land by the cooling of the lower atmosphere as it comes in contact with the ground. Also known as radiation fog.
Ground Fog - A shallow layer of fog on the ground that reduces visibility more in the horizontal than in the vertical.
Valley breeze A shallow, upslope flow of air that develops during daylight hours within mountain valleys.
Vapor pressure The portion of the total air pressure exerted by the water vapor component of air.
Waves in or near such bars may be especially hazardous to mariners due to the interaction of swell, tidal and/or river currents in relatively shallow water.
It is shallow in nature, as circulation decreases with height. Associated with cold Arctic air, it is usually stationary. Also known as a cold core high. Contrast with a warm high.
Thermal HighArea of high pressure that is shallow in vertical extent and produced primarily by cold surface temperatures.Thermal LowArea of low pressure that is shallow in vertical extent and produced primarily by warm surface temperatures.
Heavy Surf AdvisoryAn advisory issued by the National Weather Service for fast moving deep water waves which can result in big breaking waves in shallow water (the surf zone). HectopascalA unit of pressure equal to a millibar (1 hPa = 1 mb).
Arctic frontThe boundary or front separating deep, cold arctic air from shallower, relatively less cold polar air.
The thermocline reaches its maximum depth at mid-latitudes and is shallowest at the equator and at its northern and southern limits. The thermocline is stably stratified, and transfer of water and carbon dioxide across this zone occurs very slowly.
Sometimes in Melbourne, the night before the onset of severe fire weather conditions is calm and mild, as a shallow layer of stable air near the earth's surface - known as an atmospheric inversion - insulates the city from hot air and strengthening ...
If fog is so shallow that it is not an obstruction to vision at a height of 6 ft above the surface, it is called simply shallow fog. In aviation weather observations fog is encoded F, and ground fog GF.
Vertical shear (which doesn't have to be throughout the troposphere, but can also be over a very shallow layer) destroys the convection around the centre of the tropical cyclone (the 'eye').
Maritime Continent is the name given primarily by meteorologists to the region of Southeast Asia which comprises many islands, peninsulas and shallow seas.
Upwelling the transport of deeper water to shallow levels
One oceanic process altered during an El Niño year is upwelling, which is the rising of deeper colder water to shallower depths.
Primarily refers to an elongated area of shallow high pressure at the earth's surface. It is generally associated with cold air east of the Rockies or Appalachians. It is another name for a ridge, ridge line, or ridge axis. Contrast with a trough.
Polar low Small, shallow depression which forms mainly in winter over some high-latitude seas within a polar or arctic air mass. Its motion is approximately the same as the air stream in which it is embedded.
Bar- an obstacle formed at the shallow entrance at the mouth of a river or bay that empties into the ocean; when a swift ebb current and heavy seas rolling in from the Pacific meet, large breakers develop over the bar.
Damage to chimneys and TV antennae; uproots shallow rooted trees and blows down limbs or branches.
73-112 mph
Peels surface off roofs; windows broken; mobile homes moved or overturned; moving automobiles pushed off roads ...
It is used to describe forests which grow in harsh environments, typically windblown, perhaps at high elevation, often dry and in very shallow or rocky soils. Many of the world's mountain ranges have elfin forests.
TIDAL BORE - A rapid rise in water caused by tidal changes where shallow water meets open ocean during large tidal ranges (differences between low and high tides).
jet streamGenerally strong westerly winds concentrated in a narrow and shallow stream in the upper troposphere.
COLD HIGH A high pressure system that has its coldest temperatures at or near the center of circulation, and horizontally, is thermally barotropic. It is shallow in nature, as circulation decreases with height.
ISENTROPIC LIFT / DESCENT- Lifting or sinking of air along constant potential temperature (theta) surfaces. WAA (especially over shallow frontal boundaries) leads to lift while CAA leads to descent.
ISOBAR- A line of constant surface pressure.
Jet stream: strong, generally westerly winds concentrated in a relatively narrow and shallow stream in the upper troposphere.
K
L ...
It is shallow in comparison with Arctic air. Maritime polar (mP) initially possesses similar properties to those of continental polar air, but in passing over warmer water it becomes unstable with a higher moisture content. Compare tropical air.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Aerosol, Dense Fog Advisory, Evaporation-mixing Fog, Freezing Fog, GF, Ground Fog, Ice Fog, Nieve Penitente, Rain Induced Fog, Shallow Fog, Steam Fog, Tule Fog, ...
 See also: Shall, Water, Air, Surface, Temperature
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