This condition is called geostrophic equilibrium or geostrophic balance (also known as geostrophy). The geostrophic wind is directed parallel to isobars...
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In atmospheric science, the thermal wind is the vector difference between the geostrophic wind at upper altitudes minus that at lower altitudes in the...
11 KB (1,450 words) - 03:46, 4 January 2024
isobars show the direction of geostrophic winds. Geostrophic flow may be either barotropic or baroclinic. A geostrophic current may also be thought of...
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wind on shore during daylight hours. Thermal wind is a meteorological term not referring to an actual wind, but a difference in the geostrophic wind between...
29 KB (3,345 words) - 16:06, 10 June 2024
While geostrophic motion refers to the wind that would result from an exact balance between the Coriolis force and horizontal pressure-gradient forces...
11 KB (2,150 words) - 15:30, 16 June 2023
wind component is the difference between actual and geostrophic wind, which is responsible for air "filling up" cyclones over time. The gradient wind...
105 KB (11,212 words) - 23:33, 4 August 2024
atmosphere. In the free atmosphere, geostrophic wind relationships should be used. The equation to estimate the mean wind speed ( u z {\displaystyle u_{z}}...
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Balanced flow (redirect from Geostrophic balance)
centers is small, and geostrophic flow no longer applies with a useful degree of accuracy. Surface pressure charts supporting gradient-wind conditions Each...
41 KB (5,847 words) - 04:40, 29 April 2024
"free atmosphere", where the wind is approximately geostrophic (parallel to the isobars), while within the PBL the wind is affected by surface drag and...
21 KB (2,073 words) - 13:30, 30 April 2024
Over a city or rough terrain, the wind gradient effect could cause a reduction of 40% to 50% of the geostrophic wind speed aloft; while over open water...
35 KB (4,299 words) - 16:29, 29 February 2024
(ageostrophic flow) is the difference between the actual wind or current and the geostrophic wind or geostrophic current. Since geostrophy is an exact balance between...
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drag coefficient increases with increasing wind speed and is greater for shallower waters. The geostrophic drag coefficient is expressed as: C g = τ U...
24 KB (3,206 words) - 14:50, 27 March 2024
This results in the 'actual wind' or 'true wind', including ageostrophic corrections, which add to the geostrophic wind that is characterized by flow...
21 KB (2,395 words) - 13:56, 7 August 2024
and speed of the geostrophic wind are independent of height. In other words, there is no vertical wind shear of the geostrophic wind. It also implies...
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Contour line (section Wind)
Isallobaric gradients are important components of the wind as they increase or decrease the geostrophic wind. An isopycnal is a line of constant density. An...
36 KB (4,358 words) - 05:29, 8 June 2024
will also be isothermal surfaces, hence (from the thermal wind equation) the geostrophic wind will not vary with depth. Hence, the motions of a rotating...
3 KB (455 words) - 01:39, 4 July 2021
further difficulties, because horizontal winds are mostly geostrophic, to a good approximation. Geostrophic winds merely circulate horizontally, and do not...
15 KB (1,538 words) - 23:10, 14 January 2024
of the geostrophic wind speed aloft; while over open water or ice, the reduction is between 10% and 30%. In most basins, maximum sustained winds are used...
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Adverse pressure gradient Force density Isobar Geopotential height Geostrophic wind Primitive equations Temperature gradient Conner A. Perrine (1967) The...
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Potential vorticity (section Quasi-geostrophic PV)
streamfunction Ψ {\textstyle \Psi } under the quasi-geostrophic assumption. The geostrophic wind field can then be readily deduced from Ψ {\textstyle...
24 KB (3,795 words) - 05:46, 7 August 2024
parallel to the isobars on an elevation in pressure card. It's called the geostrophic wind. Pressure differences depend, in turn, on the average temperature in...
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that layer. Geopotential height contours can be used to calculate the geostrophic wind, which is faster where the contours are more closely spaced and tangential...
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oceans, lakes, and laboratory experiments. Rossby waves, geostrophic currents, and geostrophic winds are examples of inertial waves. Inertial waves are also...
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February 13, 1979, windstorm (section Wind velocity)
gradient across the Kitsap Peninsula region. At 6 mbar over 8 miles, the geostrophic wind potential easily exceeded 200 knots (which roughly translates to about...
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steepens during frontogenesis, the thermal wind becomes imbalanced. To maintain balance, the geostrophic wind aloft and below adjust, such that regions...
16 KB (1,608 words) - 17:54, 28 July 2024
pressure gradient force (known as geostrophic balance). The true wind almost always differs from the geostrophic wind due to the influence of other forces...
187 KB (21,500 words) - 23:23, 1 June 2024
quantum mechanics Quasigeostrophic, an atmospheric dynamics theory; see Geostrophic wind Quadrature Generator; see quadrature amplitude modulation Nissan QG...
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Kelvin's circulation theorem Vorticity equation Thermal wind Geostrophic current Geostrophic wind Taylor–Proudman theorem Hydrostatic equilibrium Ekman...
10 KB (1,066 words) - 19:39, 20 May 2022
Secondary flow (section Wind near ground level)
define an approximate geostrophic wind or gradient wind, balanced flows that are parallel to the isobars. Measurements of wind speed and direction at...
18 KB (2,671 words) - 14:46, 23 April 2024
Monsoon of South Asia (category Winds)
less common tropical easterly jets. They follow the principle of geostrophic winds. Over India, a subtropical westerly jet develops in the winter season...
51 KB (6,045 words) - 08:23, 7 August 2024