Polar vortices are weakest during summer and strongest during winter. [18] The strength and position of the polar vortex shapes the flow pattern in a broad area about it. Which of the following is a type of amphibian? This warming of stratospheric air can reverse the circulation in the Arctic Polar Vortex from counter-clockwise to clockwise. [44], The general assumption is that reduced snow cover and sea ice reflect less sunlight and therefore evaporation and transpiration increases, which in turn alters the pressure and temperature gradient of the polar vortex, causing it to weaken or collapse. This rapidly brings cold dry air into contact with the warm, moist air of the mid-latitudes, resulting in a rapid and dramatic change of weather known as a "cold snap". He said he had come to know and understand the texture of life in India for it was in many respects similar to the texture of life in Turkey. [14] Since polar vortices exist from the stratosphere downward into the mid-troposphere,[4] a variety of heights/pressure levels are used to mark its position. A mass of fluid, especially of a liquid, having a whirling action; the form assumed by a fluid in such motion; a whirlpool; an

When the Arctic pattern is at its weakest, subtropic air masses can intrude poleward causing the Arctic air masses to move equatorward, as during the Winter 1985 Arctic outbreak. This event signifies the transition from winter to spring, and has impacts on the hydrological cycle, growing seasons of vegetation, and overall ecosystem productivity. The US National Weather Service warned that frostbite is possible within just 10 minutes of being outside in such extreme temperatures, and hundreds of schools, colleges and universities in the affected areas were closed.

[22][23][clarification needed], Sudden stratospheric warming events are associated with weaker polar vortices.

As winter approaches, the vortex core cools, the winds decrease, and the vortex energy declines. endowed with a rapid rotary motion around an axis which was also the [47] These clouds can only form at temperatures below about −80 °C (−112 °F).

[51], Persistent cold-core low-pressure area that circles one of the poles, "GEOS-5 Analyses and Forecasts of the Major Stratospheric Sudden Warming of January 2013", http://blog.quarkexpeditions.com/polar-vortex-the-science-myth-media-hype-behind-north-american-weather-phenomenon, "Polar vortex: What is it and how does it happen? The breakdown of the polar vortex is an extreme event known as a sudden stratospheric warming, here the vortex completely breaks down and an associated warming of 30–50 °C (54–90 °F)[clarification needed] over a few days can occur.
A whirling mass of fluid or air, especially a whirlpool or whirlwind. formation of the universe, and the movements of the bodies composing [35] In the same year, researchers found a statistical correlation between weak polar vortex and outbreaks of severe cold in the Northern Hemisphere. A soft spot just south of Greenland is where the initial step of downwelling occurs, nicknamed the "Achilles Heel of the North Atlantic". Mid 17th century from Latin vortex, vortic-, literally ‘eddy’, variant of vertex.

The polar vortex was first described as early as 1853. ces (-tĭ-sēz′) 1. [4], A deep freeze that gripped much of the United States and Canada in late January 2019 has been blamed on a polar vortex. If large enough, the piece can move into Canada and the Midwestern, Central, Southern, and Northeastern United States. When the breakup is early, there is one warming period from late February to middle March. A blocking event in 2012 emerged when a high-pressure over Greenland steered Hurricane Sandy into the northern Mid-Atlantic states.[45]. In the autumn, the circumpolar winds increase in speed and the polar vortex rises into the stratosphere. For example, the 2013–14 United Kingdom winter floods were blamed on the Polar vortex bringing severe cold in the United States and Canada. Climatology observations require several decades to definitively distinguish natural variability from climate trends. In the late winter, air parcels do not descend as much, reducing mixing. As a result, during late winter, large fragments of the vortex air can be diverted into lower latitudes by stronger weather systems intruding from those latitudes. [clarification needed] As a result of increased waves into the vortex, the vortex experiences more rapid warming than normal, resulting in an earlier breakup and spring.

Extratropical cyclones that migrate into higher latitudes when the polar vortex is weak can disrupt the single vortex creating smaller vortices (cold-core lows) within the polar air mass.

[46] Chlorine concentrations build up during the polar winter, and the consequent ozone destruction is greatest when the sunlight returns in spring. When the Arctic vortex is at its strongest, there is a single vortex, but normally, the Arctic vortex is elongated in shape, with two cyclone centers, one over Baffin Island in Canada and the other over northeast Siberia. [2] The phenomenon was mentioned frequently in the news and weather media in the cold North American winter of 2013–2014, popularizing the term as an explanation of very cold temperatures.[3]. Thanks for using this online dictionary, we have been helping millions of people improve their use of the TAMIL language with its free online services. ", <1319:TAOTSP>2.0.CO;2 "The Area of the Stratospheric Polar Vortex as a Diagnostic for Tracer Transport on an Isentropic Surface", 10.1175/1520-0469(1986)043<1319:TAOTSP>2.0.CO;2, "Current map of arctic winds and temperatures at the 10 hPa level", "Current map of arctic winds and temperatures at the 70 hPa level", "Current map of arctic winds and temperatures at the 250 hPa level", "Current map of arctic winds and temperatures at the 500 hPa level", "Current map of antarctic winds and temperatures at the 10 hPa level", "Current map of antarctic winds and temperatures at the 70 hPa level", "Current map of antarctic winds and temperatures at the 250 hPa level", "Current map of antarctic winds and temperatures at the 500 hPa level", List of atmospheric pressure records in Europe, https://en.wikipedia.org/w/index.php?title=Polar_vortex&oldid=980361816, Articles with incomplete citations from November 2016, Articles with self-published sources from November 2016, Articles with self-published sources from January 2014, Wikipedia articles needing clarification from February 2019, Wikipedia articles needing clarification from April 2016, Wikipedia articles needing clarification from November 2018, Creative Commons Attribution-ShareAlike License, This page was last edited on 26 September 2020, at 03:18. When the polar vortex is strong, the mid-latitude Westerlies (winds at the surface level between 30° and 60° latitude from the west) increase in strength and are persistent. An index which is used in the northern hemisphere to gauge its magnitude is the Arctic oscillation.[19]. This caused warm, dry conditions in the west, and cold, snowy conditions in the north-central and northeast. [20] The Antarctic polar vortex is more pronounced and persistent than the Arctic one. Are You Learning English? [13] Horizontally, most polar vortices have a radius of less than 1,000 kilometres (620 mi). Find more Latin words at wordhippo.com! Small amounts of heating or cooling traveling from the polar vortex can trigger or delay downwelling, altering the Gulf Stream Current of the Atlantic, and the speed of other ocean currents.

Once late winter and early spring approach the vortex is at its weakest. Other astronomical bodies are also known to have polar vortices, including Venus (double vortex – that is, two polar vortices at a pole),[50] Mars, Jupiter, Saturn, and Saturn's moon Titan. The chemistry of the Antarctic polar vortex has created severe ozone depletion. A mass of whirling fluid, especially a whirling mass of water or air that sucks everything near it toward its center. Around 21 people died in US due to severe frostbite. English words for vortex include vortex, whirlpool, highest, summit, top, peak, head, chief, pole of the heavens and whirlwind. When the northern vortex weakens, it separates into two or more smaller vortices, the strongest of which are near Baffin Island, Canada, and the other over northeast Siberia. ", "Arctic ice loss amplified Superstorm Sandy violence", "Double vortex at Venus South Pole unveiled! [24] These changes aloft force changes in the troposphere below. The Polar vortex is also thought to have had effects in Europe. vortex - tamil meaning of சுழிப்பு. Are You Learning English? texture tamil meaning and more example for texture will be given in tamil. Does English Have More Words Than Any Other Language? , whirlpool, gyre, maelstrom, eddy, swirl, swirling, countercurrent, counterflow, These Foreign Words And Phrases Are Now Used In English. 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. Any one of numerous species of small Turbellaria belonging [31] After the vortex is broken up, the ex-vortex air is dispersed into the middle latitudes within a month.
The jet stream amplitude increases with a weaker polar vortex, hence increases the chance for weather systems to become blocked. Vortex : நீர்ச்சழி, சூறாவளி கொடிய சுழி, பெருஞ் சுழற் காற்று, Vortex : சூறாவளி கொடிய சுழி,நீர்ச்சழி,நீர்ச்சழி,சூறாவளி கொடிய சுழி,பெருஞ் சுழற் காற்று,நீர்ச்சுழல்,பெருஞ் சுழற் காற்று. The vortices weaken and strengthen from year to year.

A polar vortex strengthens in the winter and weakens in the summer because of its dependence on the temperature difference between the equator and the poles.

Saturn's south pole is the only known hot polar vortex in the solar system. Here Are Our Top English Tips, The Best Articles To Improve Your English Language Usage, The Most Common English Language Questions. A mass of whirling fluid or air, especially a whirlpool or whirlwind.

Learn more. 2. This becomes apparent when the jet stream amplitude increases (meanders) over the northern hemisphere, causing Rossby waves to propagate farther to the south or north, which in turn transports warmer air to the north pole and polar air into lower latitudes. Vortex meaning has been search 1511 (one thousand five hundred and eleven) times till 8/1/2020. [14], Volcanic eruptions in the tropics can lead to a stronger polar vortex during winter for as long as two years afterwards. [27] Intensification of the polar vortex produces changes in relative humidity as downward intrusions of dry, stratospheric air enter the vortex core. ‘a swirling vortex of emotions’ ‘As this material approaches the black hole, it swirls in a vortex, like water swirling down a drain.’ ‘The magnetic fields of these vortices cause them to repel one another just as like-oriented magnets do.’ We are to secure all "loose objects"; hood up our Fleury Rays; and "on no account to attempt to clear snow from our conning-towers till the weather abates."

VORTEX meaning in tamil, VORTEX pictures, VORTEX pronunciation, VORTEX translation,VORTEX definition are included in the result of VORTEX meaning in tamil at kitkatwords.com, a free online English tamil Picture dictionary. The jet stream is seen to "buckle" and deviate south.

[15] At the level of the tropopause, the extent of closed contours of potential temperature can be used to determine its strength. [16], Polar vortices are weakest during summer and strongest during winter. A place or situation regarded as drawing into its center all that surrounds it, and hence being inescapable or destructive: a vortex of political infighting; a vortex … [9], In Australia, the polar vortex, known there as a "polar blast" or "polar plunge", is a cold front that drags air from Antarctica which brings rain showers, snow (typically inland, with blizzards occurring in the highlands), gusty icy winds, and hail in the south-eastern parts of the country, such as in Victoria, Tasmania, the southeast coast of South Australia and the southern half of New South Wales.