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# Topic: Coriolis effect

###### In the News (Thu 22 Aug 19)

 Coriolis Effect Coriolis showed that, if the ordinary Newtonian laws of motion of bodies are to be used in a rotating frame of reference, an inertial force--acting to the right of the direction of body motion for counterclockwise rotation of the reference frame or to the left for clockwise rotation--must be included in the equations of motion. The Coriolis deflection is therefore related to the motion of the object, the motion of the Earth, and the latitude. For this reason, the magnitude of the effect is given by 2 sin, in which is the velocity of the object, is the angular velocity of the Earth, and is the latitude. abyss.uoregon.edu /~js/glossary/coriolis_effect.html   (469 words)

 USATODAY.com In simple terms, in the Northern Hemisphere, while the Coriolis force is pushing the wind toward the right, the pressure-gradient force, caused by air pressure differences, is pushing the air toward the center of the area of low pressure, and for various reasons is stronger then the Coriolis force. The face that the Coriolis force is zero at the equator and very week near the equator, explains why tropical cyclones such as hurricanes and typhoons won't form on the equator even though the other factors there, such as warm ocean water, would make them likely. Understanding the Coriolis force is difficult, in addition to the material on Alistair Fraser's Coriolis FAQ, you'll find a different way of looking at things by going to the Rotating Frames of Reference in Space and on Earth section of NASA's From Stargazers to Starships Web book. www.usatoday.com /weather/resources/basics/coriolis-understanding.htm   (533 words)

 Coriolis Force: an artifact of the earth's rotation This apparent deflection is called the "Coriolis force" and is a result of the earth's rotation. As air moves from high to low pressure in the northern hemisphere, it is deflected to the right by the Coriolis force. In the southern hemisphere, air moving from high to low pressure is deflected to the left by the Coriolis force. ww2010.atmos.uiuc.edu /(Gh)/guides/mtr/fw/crls.rxml   (195 words)

 Coriolis effect Summary The Coriolis effect caused by the rotation of the Earth is responsible for the precession of a Foucault pendulum and for the direction of rotation of cyclones. In meteorology, Coriolis effects tend to dominate the centrifugal effects associated with, for example, the rotation of large cyclones, because the latter are usually balanced by an ambient pressure gradient (exactly analogously to the slope on a parabolic turntable). the Coriolis effect decreases nearer the equator because the surface of the Earth is parallel to the axis of rotation. www.bookrags.com /Coriolis_effect   (4583 words)

 * Coriolis Effect - (Meteorology): Definition The Coriolis effect is a few orders of magnitude smaller than other random influences on drain direction, such as the geometry of the sink, toilet, or tub; whether it is flat or tilted; and the direction in which water was initially added to it. Coriolis effect A deflective force arising from the rotation of the earth on its axis; affects principally synoptic-scale and global-scale winds. Coriolis effect: as a consequence of earth's rotation, air moving across it's surface appears to be deflected relative to an observer standing on the surface. en.mimi.hu /meteorology/coriolis_effect.html   (281 words)

 "Getting Around The Coriolis Force" - Revised Nov 15, 2000 The Coriolis effect is a force in the first sense, but not in the second sense: nothing is actually pushing or pulling on anything, the acceleration is due to the fact that the observer is moving in a circle. As a result, the Coriolis effect generally doesn't have a noticeable effect to people on the ground; the speed of the point you're standing on and the speed of the point you're stepping onto are too close for you to tell the difference. The Coriolis effect "pushes" them away from the axis, and gravity pulls the object back down to the ground so that the remaining effect is an apparent "push" to the south. www.physics.ohio-state.edu /~dvandom/Edu/newcor.html   (2564 words)

 Reference.com/Encyclopedia/Coriolis effect This effect is caused by the rotation of the Earth and is responsible for the direction of the rotation of cyclones. In reality, the Coriolis effect is a few orders of magnitude smaller than various random influences on drain direction, such as the geometry of the sink, toilet, or tub, and the direction in which water was initially added to it. A practical application of the Coriolis effect is the mass flow meter, an instrument that measures the mass flow rate and density of a fluid flowing through a tube. www.reference.com /browse/wiki/Coriolis_effect   (3527 words)

 Urban Legends Reference Pages: Coriolis Force Effect on Drains This is due to the Coriolis Effect, which is caused by the rotation of the Earth. Best known is its effect on air masses: as they move away from the equator, their speed (which matches that of where they started from) appears to be faster than that of the surface over which they are traveling. The twisting effect of the Coriolis force is real and does influence certain large things like the movement of air masses, but the effect is so small that it plays no role in determining the direction in which water rotates as it exits from a draining sink or toilet. www.snopes.com /science/coriolis.asp   (702 words)

 Physical Effects of the Earth's Rotation (Coriolis Effects) The vertical Coriolis effect was actually predicted by Newton, when he discovered the laws which govern the motions of things throughout the Universe. In addition to this effect, due to the vertical part of the rotational effect, there is a horizontal effect, which is usually explained by describing the motion of a pendulum. The horizontal effect is an apparent veering to the right or left of a straight-line path by an object moving horizontally; as viewed from space, the object is actually moving in as straight-line a path as possible, given the curvature of the Earth's surface. www.cseligman.com /text/planets/coriolis.htm   (2211 words)

 Coriolis effect - HighBeam Encyclopedia   (Site not responding. Last check: ) Coriolis effect [for G.-G. de Coriolis, a French mathematician], tendency for any moving body on or above the earth's surface, e.g., an ocean current or an artillery round, to drift sideways from its course because of the earth's rotation. The Coriolis deflection of a body moving toward the north or south results from the fact that the earth's surface is rotating eastward at greater speed near the equator than near the poles, since a point on the equator traces out a larger circle per day than a point on another latitude nearer either pole. Coriolis mass flowmeters--filling key process needs: coriolis flowmeters, once limited to pure, clear liquids, are now satisfying the more difficult requirements of the process industries.(Coriolis metering technology) www.encyclopedia.com /doc/1E1-Coriolis.html   (575 words)

 Wind as a Factor in Arctic Weather and Climate The Coriolis effect is zero at the equator and increases to a maximum at the poles. The effect is proportional to wind speed; that is, deflection increases as wind strengthens. The resultant balance between the pressure force and the Coriolis force is such that, in the absence of surface friction, air moves parallel to isobars (lines of equal pressure). nsidc.org /arcticmet/factors/winds.html   (818 words)

 UKDivers.net - Weather - The Coriolis Effect The coriolis effect is a major influencer on the weather and needs to be understood. Coriolis is a change in the wind due to the anti-clockwise rotation of the earth on it's North axis. The direction of the wind deflection due to the Coriolis effect is best remembered using Buy's Ballot's Law which says: If you stand with your back to the wind in the Northern hemisphere you will have low pressure on you left hand side (the opposite applies to the south). www.ukdivers.net /meteorology/coriolis.htm   (565 words)

 AllRefer.com - Coriolis effect (Weather And Climate: Terms And Concepts) - Encyclopedia Coriolis effect[kOr´´E-O´lis] Pronunciation Key [for G. Coriolis], tendency for any moving body on or above the earth's surface, e.g., an ocean current or an artillery round, to drift sideways from its course because of the earth's rotation. The Coriolis deflection of a body moving toward the north or south results from the fact that the earth's surface is rotating eastward at greater speed near the equator than near the poles, since a point on the equator traces out a larger circle per day than a point on another latitude nearer either pole. It is extremely important to account for the Coriolis effect when considering projectile trajectories, terrestrial wind systems, and ocean currents. reference.allrefer.com /encyclopedia/C/Coriolis.html   (346 words)

 Foucault's Pendulum and the Coriolis effect To degrade this amazing effect using the premature descriptive conclusion "proves the Earth rotates" denies science credibility because a far more important question was not answered, that being, "Relative to what and measured against what standard?" A fundamental question that if left unanswered would challenge the integrity of the scientific method and the sciences. Evidence of Coriolis rotation can be observed from the coffee cup to the Quasar, as these convection cells hold tight spinning balls of matter together. The Coriolis effect becomes Ferrel's law when geographer's describe the mindless motion of liquids flowing across a rotating spherical body. www.geocities.com /longhairedbastard/coriolis.htm   (3602 words)

 Tides The Coriolis Effect is the result of moving on a spherical rotating earth. The Coriolis Effect causes things moving toward the poles to lead the earth's rotation because they are headed into regions where the earth's rotational speed is slower. The Coriolis Effect causes things moving toward the equator to lag the earth's rotation because they are headed into regions where the earth's rotational speed is faster. www.uwgb.edu /dutchs/EarthSC102Notes/102TheOceans.HTM   (1514 words)

 The Coriolis Effect The coriolis effect is cited as the reason behind the different ways that drains empty. First identified in 1778 by Pierre-Simon Laplace, and later described by Gustave-Gaspard Coriolis in 1835, the coriolis effect is a result of the daily rotation of the Earth. This is the coriolis effect and it is too small to be detected at the scale of a kitchen sink. physics.suite101.com /article.cfm/thecorioliseffect   (366 words)

 The Coriolis Effect The ball curves because of the Coriolis Effect. Coriolis introduced a new term that let people use the laws of motion in a rotating system. The Coriolis Effect is used to explain why a straight path curves to the side when the system is spinning. www.windows.ucar.edu /earth/Atmosphere/tornado/coriolis.html   (168 words)

 MICROLIGHT HANGAR :: THE NO.1 UK & IRELAND MICROLIGHT PORTAL   (Site not responding. Last check: ) Coriolis force is zero at the equator and increases with latitude to a maximum at the poles. Coriolis force continues to deflect the wind until is is blowing parallel to the isobars. Coriolis force and pressure gradient force balance, and above surface friction (about 2,000 feet), causes the wind to blow parallel to the isobars. www.microlighthangar.com /safety_mountainflying.shtm   (3082 words)

 Coriolis effect The Coriolis effect explains the directions of the trade winds in equatorial regions on Earth and, in general, plays a prominent part in studies of atmospheric dynamics of planets with dense atmospheres. It also figures in some aspects of astrophysics and stellar dynamics; for example, it is a controlling factor in the direction of rotation of sunspots. The effect, also known as the Coriolis force, is named after the French physicist Gustave de Coriolis (1792-1843). www.daviddarling.info /encyclopedia/C/Coriolis_effect.html   (215 words)

 Rotating Space Station Dynamics   (Site not responding. Last check: ) The Earth rotates relatively slowly and the Coriolis Effect is not observable except in global size movements such as the circulation of the ocean waters or the movement of air in weather systems. Very careful and specially designed experiments have shown the coriolis acceleration on a human scale but it is a very, very small effect easily obscured by small tilts and vibrations. The coriolis force is always perpendicular the the direction of motion (velocity) of the ball and the axis of rotation of the station. www.go.ednet.ns.ca /~larry/physics/coriolis.html   (1219 words)

 The Straight Dope: Do bathtubs drain counterclockwise in the Northern Hemisphere? The supposed reason for this "fact" is the Coriolis effect, which has to do with the effect of the earth's rotation on moving objects. However, when you get down to itty-bitty phenomena such as the water draining out of your bathtub, the Coriolis effect is insignificant, amounting to roughly three ten-millionths of the force of gravity (in Boston, at least, which is where they happened to do the measuring). Hence the influence of the Coriolis effect may be safely described as slight. www.straightdope.com /classics/a1_161.html   (594 words)

 The Mysterious Coriolis Effect   (Site not responding. Last check: ) To understand the Coriolis effect you only have to appreciate one simple thing...on a rotating body, the velocity of any particular point on the body depends on the distance of that point from the axis of rotation. This means the Coriolis effect is small at the equator and increases to a maximum near the poles. The Coriolis effect is smaller in the Southern part of the low pressure system, so the air mass is bent less and travels in a straighter line. home.comcast.net /~cessna27/the_mysterious_coriolis_effect.htm   (1968 words)

 Coriolis Flow meter Density Coriolis Mass Flowmeter - This meter uses the Coriolis effect to measure the amount of mass moving through the element. Coriolis meters are becoming ever more popular as some companies are using the technology as a complete solution for Coriolis flow, density, and even concentration measurement. Corioilis flowmeters are used in a wide range of applications in the oil and gas /petrochemical, food industry and general industries due to their ability to measure mass flow. www.flowmeterdirectory.com /flowmeter_coriolis.html   (616 words)

 Coriolis Effect: World of Earth Science In the Northern Hemisphere, air is deflected counterclockwise (to right of its established path of motion) as it moves inward toward a low-pressure area (zone of convergence). In astronomy and astrophysics the Coriolis effect explains the rotation of sunspots. A popular canard (a popular, widely accepted, but false premise) is that water in sinks and toilet bowls drains away in counterclockwise or clockwise motion depending on whether the drain is located in the northern or Southern Hemisphere. science.enotes.com /earth-science/coriolis-effect   (577 words)

 Does water go down the drain counterclockwise in the northern hemisphere and clockwise in the southern hemisphere? ... The Coriolis force is caused by the earth’s rotation. The Coriolis Effect is the observed curved path of moving objects relative to the surface of the Earth. The Coriolis force is too weak to operate on the moving air at the equator. www.loc.gov /rr/scitech/mysteries/coriolis.html   (496 words)

 Geography4Kids.com: Atmosphere: Coriolis Force As it moves higher, there is less drag (a force that slows down gas molecules) from the surface of the Earth. The air is able to accelerate and move faster, and as anything goes faster in the atmosphere, the Coriolis Force has a greater force on it. The combination of the air moving from high to low pressure PLUS the Coriolis Force starts a spiral (like a hurricane spinning) set of winds. www.geography4kids.com /files/atm_coriolis.html   (476 words)

 The Coriolis effect revisited This apparent leftwards torsion on the wind in the southern hemisphere is what we mean by the Coriolis effect. In reality the Coriolis force is largely balanced by the pressure gradient force, so that the wind direction typically changes little relative to the Earth over the course of 3 hours. The first one visualizes the Coriolis effect on a merry-go-round spinning in a clockwise direction (i.e., it applies to the southern hemisphere, Fig 1). www-das.uwyo.edu /~geerts/cwx/notes/chap11/coriolis.html   (419 words)

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