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	Rossby number - Wikipedia, the free encyclopedia
		The Rossby number, named for Carl-Gustav Arvid Rossby, is a dimensionless number used in describing fluid flow, usually in geophysical phenomena in the oceans and atmosphere.
		When the Rossby number is large (either because f is small, such as in the tropics and at lower latitudes; or because L is small, ie for small-scale motions such as flow in a bathtub; or for large speeds), the effects of planetary rotation are unimportant and can be neglected.
		When the Rossby number is small, then the effects of planetary rotation are large and the net acceleration is comparably small allowing the use of the geostrophic approximation.
	en.wikipedia.org /wiki/Rossby_number (201 words)

	Experiments on instability of columnar vortex (Site not responding. Last check: 2007-10-23)
		The characteristics of the unstable anticyclone are determined by the main nondimensional parameter of the flow - the Rossby number.
		The Rossby number was estimated by the peak value of vorticity in the core of each vortex when the pair was formed in some short period of time after the flap stopped.
		The centrifugal instability with distinct wavelength was observed to develop in the range of the Rossby number between 1 and 3.5 for the anticyclonic vortex.
	www.physics.mun.ca /~yakov/paperGAFD.html (5683 words)

	Dimensionless quantity - Wikipedia, the free encyclopedia
		According to the Buckingham π-theorem of dimensional analysis, the functional dependence between a certain number (e.g., n) of variables can be reduced by the number (e.g., k) of independent dimensions occurring in those variables to give a set of p = n − k independent, dimensionless numbers.
		The power consumption of a stirrer with a particular geometry is a function of the density and the viscosity of the fluid to be stirred, the size of the stirrer given by its diameter, and the speed of the stirrer.
		Reynolds number (This is the most important dimensionless number; it describes the fluid flow regime)
	en.wikipedia.org /wiki/Dimensionless_number (770 words)

	Carl-Gustav Arvid Rossby (Site not responding. Last check: 2007-10-23)
		Born in Stockholm Sweden Rossby developed an interest in meteorology and oceanography while studying under Vilhelm Bjerknes at the University of Stockholm and University of Leipzig.
		In 1926 Rossby moved to the USA to join the U.S. Weather Bureau in Washington DC There he combined theoretical work on turbulence with the establishment of the first service for civil aviation.
		During World War II Rossby organised the training of military recruiting many of them to his Chicago in the post-war years where he began his mathematical description of atmospheric dynamics to weather forecasting by electronic computer.
	www.freeglossary.com /Carl-Gustav_Arvid_Rossby (390 words)

	Rossby parameter - Wikipedia, the free encyclopedia
		The Rossby parameter is a number used in geophysics and meteorology which arises due to the northward variation of the Coriolis force caused by the spherical shape of the Earth.
		It is important in the generation of Rossby waves.
		Although both involve Coriolis effects, the Rossby parameter describes the variation of the effects with latitude (hence the latitudinal derivative), and should not be confused with the Rossby number.
	en.wikipedia.org /wiki/Rossby_parameter (132 words)

	Rn-Rz
		A non-dimensional number expressing the ratio of inertial to Coriolis forces in the atmosphere or oceans.
		In a stratified fluid the baroclinic Rossby radius is similarly computed, except that c is now the wave speed of the nth baroclinic mode as would be found in a normal mode decomposition of the system.
		Rossby waves in the ocean are responsible for establishing the westward intensification of circulation gyres, the Gulf Stream being one example of this.
	www-ocean.tamu.edu /~baum/paleo/paleogloss-old/node36.html (1186 words)

	Dimensionless number (Site not responding. Last check: 2007-10-23)
		A dimensionless number is a quantity which describes a certain physical system and which is a pure numberwithout any physical units.
		Such a number is typically defined as aproduct or ratio of quantities which do have units, in such a way that all units cancel.
		The power -consumption of a stirrer with a particular geometry is a function ofthe density and the viscosity of thefluid to be stirred, the size of the stirrer given by its diameter, and the speed of the stirrer.
	www.therfcc.org /dimensionless-number-57285.html (475 words)

	Dimensionless number (Site not responding. Last check: 2007-10-23)
		A dimensionless number is a quantity which describes a certain physical system and which is a pure number without any physical unit s.
		Such a number is typically defined as a product or ratio of quantities which do have units, in such a way that all units cancel.
		The power -consumption of a stirrer with a particular geometry is a function of the density and the viscosity of the fluid to be stirred, the size of the stirrer given by its diameter, and the speed of the stirrer.
	www.serebella.com /encyclopedia/article-Dimensionless_number.html (1557 words)

	Carl-Gustav Arvid Rossby - InformationBlast
		Carl-Gustav Arvid Rossby (December 28, 1898 - August 19, 1957 was a Swedish-US meteorologist who first explained the large-scale motions of the atmosphere in terms of fluid mechanics.
		In 1926, Rossby moved to the USA to join the U.S. Weather Bureau in Washington, DC.
		During World War II, Rossby organised the training of military meteorologists, recruiting many of them to his Chicago department in the post-war years where he began adapting his mathematical description of atmospheric dynamics to weather forecasting by electronic computer.
	www.informationblast.com /Carl-Gustav_Arvid_Rossby.html (332 words)

	The Beta-drift of Three Dimensional Vortices: A numerical study Abstract
		If the Rossby number associated with the asymmetric flow is small, to the lowest order, the asymmetric pressure gradient force at the vortex center is balanced by the Coriolis force associated with the beta-drift of the vortex.
		Rossby's theoretical explanation of beta-drift was based on the analysis of resultant force and energetics of a solid-body rotation vortex in which asymmetric vortex circulation was not permitted.
		Rossby (1948) estimated the resultant environmental pressure gradient force on a solid-body rotation vortex which is directed westward and exactly balances the Coriolis force, so that the vortex moves northward.
	www.soest.hawaii.edu /MET/Faculty/bwang/bw/pubs/20.html (2052 words)

	Thunderstorm Rotation, K. Kilty
		The Rossby number is a measure of the tendency of planetary vorticity to contribute to storm rotation.
		Then the Rossby number is about 10, or, in other words, the characteristic inflow to a tornado-like vortex is characteristically 10 times "faster" than the turning of the earth.
		The larger the Rossby number, the less important is the turning of the earth.
	www.kilty.com /t_rotate.htm (1607 words)

	AMS Glossary
		Other Rossby numbers are also used, always in the form of a velocity scale divided by the product of a length times the Coriolis parameter.
		This radius is important for determining the phase speed and wavelength of baroclinic waves (Rossby waves) in the general circulation.
		The Rossby wave moves westward relative to the current, in effect slowing the eastward movement of long-wave components relative to the short-wave components in a barotropic flow.
	amsglossary.allenpress.com /glossary/browse?s=r&p=55 (856 words)

	Dimensionless number (Site not responding. Last check: 2007-10-23)
		A dimensionless number is a quantity which describes a physical system and which is a pure without any physical units.
		Such a number is typically defined a product or ratio of quantities which have units in such a way that units cancel.
		According to the π-theorem the n=5 variables can be reduced the k=3 dimensions to form p=n-k=5-3=2 independent numbers which are in case of the
	www.freeglossary.com /Dimensionless_number (703 words)

	Dimensionless number 1 - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-23)
		Start the Dimensionless number 1 article or add a request for it.
		Look for "Dimensionless number 1" in the Wikimedia Commons, our repository for free images, music, sound, and video.
		Promotional articles about yourself, your friends, your company or products; or articles written as part of a marketing or promotional campaign, may be deleted in accordance with our deletion policies.
	www.sciencedaily.com /encyclopedia/dimensionless_number_1 (188 words)

	[No title] (Site not responding. Last check: 2007-10-23)
		The Rossby number appears to be an essential external parameter for the cyclone-anticyclone asymmetry.
		Consequently, the Rossby number effect on nonlinear baroclinic waves is a central point of this study.
		Increasing the Rossby number in the PE model has the effect that the eddies of the fastest growing normal mode are tilted towards the northwest-southeast direction.
	user.uni-frankfurt.de /~tfrisius/absjas3.html (319 words)

	The Citizen Scientist
		Obviously a Rossby number so small means that the Coriolis force is much greater than the observed centripetal acceleration, and some additional force is needed to maintain the observed curvature of motion.
		The group of parameters making up the Rossby number imply that it is possible for a very slow velocity to offset a small scale size, so that even small scale phenomena might relate to the Coriolis force.
		The smallness of the Rossby number indicates that large, slowly moving tectonic plates should develop rotation from the Coriolis force, but the smallness of the Stokes number shows that viscosity disperses this rotation throughout the body of the Earth as rapidly as it develops.
	www.sas.org /tcs/weeklyIssues_2005/2005-06-03/feature2/index.html (2013 words)

	Rossby Award, PAOC
		Carl-Gustaf Rossby was the founder of the study of meteorology and physical oceanography at MIT, where he was appointed to the faculty in the Department of Aeronautics in 1928.
		Rossby is remembered as one of the major figures in the founding of the modern dynamical study of the atmosphere and ocean:
		his name is recalled ubiquitously in Rossby waves, the Rossby number, and the Rossby radius of deformation, all ideas fundamental to the understanding of all planetary scale fluids.
	www-paoc.mit.edu /paoc/education/rossby.htm (207 words)

	Coriolis force
		A large Rossby number means that the rotaion is slow compared to the pendulum's oscillation, so its effect is small.
		A small Rossby number, on the other hand, means that the pendulum's motion is significantly affected by rotation.
		The concept of Rossby number is important in geophysical fluid dynamics.
	geosci.uchicago.edu /~nnn/LAB/DEMOS/coriolis.html (1170 words)

	NationMaster - Encyclopedia: Coriolis effect (Site not responding. Last check: 2007-10-23)
		The Rossby number, named for Carl-Gustav Arvid Rossby, is a dimensionless number used in describing geophysical phenomena in the oceans and atmosphere.
		A small Rossby number signifies a system which is strongly affected by rotation, and a large Rossby number signifies a system in which rotation is unimportant.
		Long range shells landed close to, but to the right of where they were aimed until this was noted (or left if they were fired in the southern hemisphere, though most were not).
	www.nationmaster.com /encyclopedia/Coriolis-effect (4104 words)

	Which Way Will my Bathtub Drain? (Site not responding. Last check: 2007-10-23)
		Experiments have been done in both the northern and southern hemispheres to verify that under carefully controlled conditions, bathtubs drain in opposite directions due to the Coriolis acceleration from the Earth's rotation (2).
		In particular, at low Reynolds numbers, fluid physics is dominated by friction and diffusion, rather than by inertia.
		That is, at low Reynolds numbers the time it would take for a small piece of fluid to move a significant distance due to an acceleration, is greater than the time it takes for that piece to break up due to diffusion.
	math.ucr.edu /home/baez/physics/General/bathtub.html (554 words)

	Carl gustav arvid rossby - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-23)
		Start the Carl gustav arvid rossby article or add a request for it.
		Look for "Carl gustav arvid rossby" in Wiktionary, our sister dictionary project.
		Look for "Carl gustav arvid rossby" in the Wikimedia Commons, our repository for free images, music, sound, and video.
	www.sciencedaily.com /encyclopedia/carl_gustav_arvid_rossby (194 words)

	Fluid Dynamics Laboratory: Glossary
		In the shallow water approximation, the Rossby deformation radius is R = c/f in which c=(gH)^(1/2) with g the acceleration due to gravity and H the mean depth of the fluid.
		Explicitly, the Burger number is Bu = N^2 D^2/(f^2 L^2) in which N is the buoyancy frequency, f is the Coriolis parameter, and D and L are characteristic vertical and horizontal length scales, respectively.
		Explicitly, the Rossby number is Ro=U/(fL) in which U and L are characteristic velocity and horizontal length scales, respectively, and f is the Coriolis parameter at a fixed latitude.
	www.math.ualberta.ca /~bruce/glossary.html (9921 words)

	Rossby, Carl-Gustaf (Arvid) - Hutchinson encyclopedia article about Rossby, Carl-Gustaf (Arvid)
		He discovered what are now known as Rossby waves, a description of the flow of air within the jet stream, and the Rossby equation, that calculates how fast the flow develops.
		A medal bearing his name is given by the American Meteorological Society to honour significant research.
		This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.
	encyclopedia.farlex.com /Rossby%2c+Carl-Gustaf+(Arvid) (217 words)

	Rn-Rz
		Rossby was born in Sweden and joined a group studying under V.
		He gradually turned his attentions to large-scale motions and the general circulation of the atmosphere, to which he began to apply the concepts of vorticity and momentum that permeate the field today.
		In 1939 he became the assistant chief of research at the U.S. Weather Bureau and in 1940 the chairman of the Department of Meteorology at the University of Chicago, during which time he developed his theory for the long waves in the atmosphere that later came to be called Rossby waves.
	stommel.tamu.edu /~baum/paleo/paleogloss/node38.html (1972 words)

	Industrial Processes Influenced by Gravity (Site not responding. Last check: 2007-10-23)
		The fact that the limiting current density changes from steady to unsteady in a large diameter cell implies that there is a critical parameter that marks the onset of instability or turbulence in the rotating electrochemical cell.
		number (Schmidt number times solutal Rossby number) is larger than unity, so that the total mass transfer is dominated by centrifugal convection.
		The effect of capillary number and Reynolds number on coating flow is studied.
	microgravity.grc.nasa.gov /fcarchive/fluids/papers/Kamotani/Industrial_Processes_Influenced.htm (648 words)

	Continuum Balanced Models, Adjustment
		The approach assumes that the Froude number $ F$ and Rossby number $ R$ satisfy $ F \ll 1$ and $ R \ge 1$ and uses the method of matched asymptotic expansions to obtain a general mathematical description of spontaneous adjustment emission in this parameter regime.
		At sufficiently high order in the amplitude of the Rossby wave, energy flux considerations show that there must exist an exchange of energy between the Rossby wave and the inertio-gravity wave; this exchange of energy occurs for arbitrarily small Rossby number and arbitrarily small inertio-gravity wave amplitude.
		As the Burger number increases from zero to infinity, we demonstrate gradual unfreezing of energy cascades for ageostrophic dynamics, together with destabilization of Taylor-Proudman vortex columns.
	home.hetnet.nl /~e.c.neven/bal99con.html (1454 words)

	Nov 15: Rossby waves and Sverdrup circulation
		Rossby waves are a general phenomenon of planetary scale motion of fluids and gases, including the atmospheres of the other planets as well as the Earth.
		Current velocities in the ocean gyres are generally much slower than the Rossby wave speed, except at high latitudes, so oceanic Rossby wave movement is almost always westward and can be seen in the sea surface height displacements observed by orbiting radar altimeters, and also in sea surface temperature patterns.
		All that mattered was that over some several tens of meters (a depth range estimated from a simple scale analysis) it had to be that all the wind momentum passed to the ocean.
	marine.rutgers.edu /dmcs/ms501/2004/Notes/Wilkin20041115.htm (1930 words)

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