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35 relations: Ageostrophy, Anticyclone, Approximation, Atmosphere of Earth, Atmospheric pressure, Balanced flow, Cartesian coordinate system, Contour line, Coriolis force, Coriolis frequency, Cyclone, Friction, Geopotential height, Geostrophic current, High-pressure area, Inertial wave, Low-pressure area, Material derivative, Newton's laws of motion, Northern Hemisphere, Parallel (geometry), Pressure, Pressure gradient, Prevailing winds, Quasi-geostrophic equations, Rossby number, Satellite geodesy, Southern Hemisphere, Standard gravity, Synoptic scale meteorology, Taylor–Proudman theorem, Thermal wind, Tropics, Troposphere, Wind.
Ageostrophy
Ageostrophy is the real condition that works against geostrophic wind or geostrophic currents in the ocean, and works against an exact balance between the Coriolis force and the pressure gradient force.
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Anticyclone
An anticyclone (that is, opposite to a cyclone) is a weather phenomenon defined by the United States National Weather Service's glossary as "a large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the Northern Hemisphere, counterclockwise in the Southern Hemisphere".
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Approximation
An approximation is anything that is similar but not exactly equal to something else.
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Atmosphere of Earth
The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity.
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Atmospheric pressure
Atmospheric pressure, sometimes also called barometric pressure, is the pressure within the atmosphere of Earth (or that of another planet).
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Balanced flow
In atmospheric science, balanced flow is an idealisation of atmospheric motion.
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Cartesian coordinate system
A Cartesian coordinate system is a coordinate system that specifies each point uniquely in a plane by a pair of numerical coordinates, which are the signed distances to the point from two fixed perpendicular directed lines, measured in the same unit of length.
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Contour line
A contour line (also isocline, isopleth, isarithm, or equipotential curve) of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value.
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Coriolis force
In physics, the Coriolis force is an inertial force that acts on objects that are in motion relative to a rotating reference frame.
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Coriolis frequency
The Coriolis frequency ƒ, also called the Coriolis parameter or Coriolis coefficient, is equal to twice the rotation rate Ω of the Earth multiplied by the sine of the latitude φ. The rotation rate of the Earth (Ω.
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Cyclone
In meteorology, a cyclone is a large scale air mass that rotates around a strong center of low atmospheric pressure.
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Friction
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
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Geopotential height
Geopotential height is a vertical coordinate referenced to Earth's mean sea level, an adjustment to geometric height (elevation above mean sea level) using the variation of gravity with latitude and elevation.
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Geostrophic current
A geostrophic current is an oceanic flow in which the pressure gradient force is balanced by the Coriolis effect.
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High-pressure area
A high-pressure area, high or anticyclone is a region where the atmospheric pressure at the surface of the planet is greater than its surrounding environment.
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Inertial wave
Inertial waves, also known as inertial oscillations, are a type of mechanical wave possible in rotating fluids.
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Low-pressure area
A low-pressure area, low, or depression, is a region on the topographic map where the atmospheric pressure is lower than that of surrounding locations.
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Material derivative
In continuum mechanics, the material derivative describes the time rate of change of some physical quantity (like heat or momentum) of a material element that is subjected to a space-and-time-dependent macroscopic velocity field variations of that physical quantity.
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Newton's laws of motion
Newton's laws of motion are three physical laws that, together, laid the foundation for classical mechanics.
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Northern Hemisphere
The Northern Hemisphere is the half of Earth that is north of the Equator.
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Parallel (geometry)
In geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel.
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Pressure
Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.
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Pressure gradient
In atmospheric science (meteorology, climatology and related fields), the pressure gradient (typically of air, more generally of any fluid) is a physical quantity that describes in which direction and at what rate the pressure increases the most rapidly around a particular location.
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Prevailing winds
Prevailing winds are winds that blow predominantly from a single general direction over a particular point on the Earth's surface.
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Quasi-geostrophic equations
While geostrophic motion refers to the wind that would result from an exact balance between the Coriolis force and horizontal pressure-gradient forces, quasi-geostrophic (QG) motion refers to flows where the Coriolis force and pressure gradient forces are almost in balance, but with inertia also having an effect.
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Rossby number
The Rossby number (Ro) named for Carl-Gustav Arvid Rossby, is a dimensionless number used in describing fluid flow.
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Satellite geodesy
Satellite geodesy is geodesy by means of artificial satellites — the measurement of the form and dimensions of Earth, the location of objects on its surface and the figure of the Earth's gravity field by means of artificial satellite techniques.
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Southern Hemisphere
The Southern Hemisphere is the half of Earth that is south of the Equator.
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Standard gravity
The standard acceleration due to gravity (or standard acceleration of free fall), sometimes abbreviated as standard gravity, usually denoted by or, is the nominal gravitational acceleration of an object in a vacuum near the surface of the Earth.
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Synoptic scale meteorology
The synoptic scale in meteorology (also known as large scale or cyclonic scale) is a horizontal length scale of the order of 1000 kilometers (about 620 miles) or more.
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Taylor–Proudman theorem
In fluid mechanics, the Taylor–Proudman theorem (after Geoffrey Ingram Taylor and Joseph Proudman) states that when a solid body is moved slowly within a fluid that is steadily rotated with a high angular velocity \Omega, the fluid velocity will be uniform along any line parallel to the axis of rotation.
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Thermal wind
The thermal wind is wind that varies with height due to a balance between the Coriolis and pressure-gradient forces in the atmosphere.
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Tropics
The tropics are a region of the Earth surrounding the Equator.
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Troposphere
The troposphere is the lowest layer of Earth's atmosphere, and is also where nearly all weather conditions take place.
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Wind
Wind is the flow of gases on a large scale.
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Geostrophic Equation, Geostrophic Flow, Geostrophic Motion, Geostrophic balance, Geostrophic equation, Geostrophic flow, Geostrophic motion, Geostrophy.
References
[1] https://en.wikipedia.org/wiki/Geostrophic_wind
