Arctic warming and severe winter weather - The link

SHARE:

Understanding the impact of Stratospheric Polar Vortex (SPV)

SHARE:

 Arctic warming and severe winter weather - The link


Read more on - Polity | Economy | Schemes | S&T | Environment


  • The story: In the recent past, the Arctic region has warmed rapidly and studies have shown that the temperatures in the region have risen about twice as fast as global temperatures. This phenomenon is termed Arctic amplification and multiple factors including increased greenhouse gas emissions and atmospheric transport of heat to the region play important roles.
  • New finding: A study has pointed that changes in the Arctic region induced by anthropogenic global warming have disrupted a wind system called Stratospheric Polar Vortex (SPV). This stretching of SPV can lead to extreme cold events in parts of Asia and North America.
  1. Indian and Brazilian researchers noted that Arctic warming was behind the heatwaves in India. The warming was found to have an impact on the frequency and intensity of heat waves.
  2. Strangely, studies also state that this Arctic warming has propelled the cold winter spells in North America.
  • Understanding the SPV: The SPV consists of strong westerly winds from 10km to 50km above the surface. It peaks at around 50 m/s on average near 50km and is strongest in mid-winter, however, on occasion it can weaken, and sometimes the winds reverse direction entirely.
  1. These stretching events almost certainly occurred before greenhouse gas emissions began increasing, but the current emissions are leading to an increase in the occurrence of these types of events.
  2. When the polar vortex is nice and circular, that’s a sign all the cold air is bottled up over the Arctic…When it stretches like this, a piece of it goes into Asia and a piece of it goes towards eastern North America. So that’s what is seen now, say with the 2021 Texas cold wave.
  3. A reversal of the polar vortex is known to bring warm winter temperatures in Southern Asia.
  • Impact on India: Can this disruption hit India? The polar vortex stretching events are associated with relatively cold temperatures in Central and East Asia but there are no strong signals in India (so far). These events might slightly favour relatively mild temperatures.
  • Science can help: By identifying the precursor pattern to these stretching events, science can extend the warning lead time of cold extremes in Asia, Canada, and the United States. Preparing for only a decrease in severe winter weather can compound the human and economic cost when severe winter weather does occur.
  • Knowledge centre:
  1. Sudden Stratospheric Warming - A SSW refers to a rapid rise in temperatures in the stratosphere, the layer of atmosphere lying 10-50km above our heads; see Vertical Temperature Structure. The polar stratosphere is dominated by the development of the Stratospheric Polar Vortex (SPV) each winter, and this is one of the dominant driving forces of mid-latitude weather during the cold season. Encircling the SPV is the Polar Night Jet, a jet stream which sits at about 1-10hPa in the stratosphere. The Polar Night Jet is the bigger brother of the tropospheric jet stream we hear TV weather presenters talking about (this one usually sits at about 200hPa). Both the Stratospheric Polar Vortex and Polar Night Jet form during the winter months when the pole is tilted away from the Sun, and when the ephemereal polar night results in significant cooling. The Polar Night Jet forms along the strong temperature gradient generated as a result, and helps to self-contain the vortex, resulting in further cooling.
  2. Rossby waves - The SPV is often impacted by events in the troposphere and vice-versa. Rossby waves in the troposhere (responsible for the 'typical' low and high pressure systems we observe) have a vertical component of propagation as well as a horizonal component. The Rossby Waves can only propagate vertically within an eastward-moving flow, which is usually the case in the mid-latitudes in winter. Their amplitudes can increase with height, and they can propagate vertically from the troposphere into the stratosphere - a process known as wave-mean flow interaction, exerting a drag on the polar vortex. The Polar Vortex can be remarkably resilient, and not all major SSWs result in a total breakdown of the vortex. Major SSW events can therefore be split into ​​​Vortex Split and Vortex Displacement events.
  3. From 50 km up to surface - How can something so delicate going on 50km above our heads impact the weather at the surface? The idea is that anomalies in the stratospheric circulation can propagate downwards through the stratosphere and into the troposhere over a number of weeks, rather like 'dripping paint' - which is often the analogy used to describe this process.
  • EXAM QUESTIONS: (1) Explain the dynamics involved in the Stratospheric Polar Vortex (SPV) and warming/cooling effects on surface. (2) In what ways can global warming lead to unexpected events? Explain with an example.
Read more on - Polity | Economy | Schemes | S&T | Environment

#CO2 #DungBeetle #SoilBiome #Nitrogen #Insects #GlobalWarming #ClimateChange #Environment






* Content sourced from free internet sources (publications, PIB site, international sites, etc.). Take your own subscriptions. Copyrights acknowledged. 

COMMENTS

Name

01-01-2020,1,04-08-2021,1,05-08-2021,1,06-08-2021,1,28-06-2021,1,Abrahamic religions,6,Afganistan,1,Afghanistan,34,Afghanitan,1,Afghansitan,1,Africa,2,Agriculture,125,Ancient and Medieval History,47,Ancient History,1,Ancient sciences,1,April 2020,25,April 2021,22,Architecture and Literature of India,11,Art Culture and Literature,1,Art Culture Entertainment,2,Art Culture Languages,3,Art Culture Literature,7,Art Literature Entertainment,1,Artforms and Artists,1,Article 370,1,Arts,11,Athletes and Sportspersons,1,August 2020,24,August 2021,239,August-2021,3,Authorities and Commissions,4,Aviation,2,Awards and Honours,26,Awards and HonoursHuman Rights,1,Banking,1,Banking credit finance,12,Banking-credit-finance,11,Basic of Comprehension,2,Best Editorials,4,Biodiversity,41,Biotechnology,45,Biotechology,1,Centre State relations,19,CentreState relations,1,China,74,Citizenship and immigration,17,Civils Tapasya - English,92,Climage Change,3,Climate and weather,41,Climate change,59,Climate Chantge,1,Colonialism and imperialism,2,Commissions and Authorities,25,Constitution and Law,356,Constitution and laws,1,Constitutional and statutory roles,14,Constitutional issues,122,Cooperative,1,Cooperative Federalism,10,Coronavirus variants,7,Corporates,1,Corporates Infrastructure,1,Corruption and transparency,14,Costitutional issues,1,Covid,102,Covid Pandemic,1,COVID VIRUS NEW STRAIN DEC 2020,1,Crimes against women,8,Crops,3,Cryptocurrencies,1,Cryptocurrency,7,Crytocurrency,1,Currencies,4,Daily Current Affairs,453,Daily MCQ,32,Daily MCQ Practice,534,Daily MCQ Practice - 01-01-2022,1,Daily MCQ Practice - 17-03-2020,1,DCA-CS,286,December 2020,26,Decision Making,2,Defence and Militar,1,Defence and Military,230,Defence forces,5,Demography and Prosperity,22,Demonetisation,2,Destitution and poverty,6,Discoveries and Inventions,8,Discovery and Inventions,1,Disoveries and Inventions,1,Eastern religions,2,Economic & Social Development,2,Economic Bodies,1,Ecosystems,2,Education,94,Education and employment,4,Educational institutions,3,Elections,35,Elections in India,16,Energy,107,Energy laws,3,English Comprehension,3,Entertainment Games and Sport,1,Entertainment Games and Sports,25,Entertainment Games and Sports – Athletes and sportspersons,1,Entrepreneurship and startups,1,Entrepreneurships and startups,1,Enviroment and Ecology,2,Environment and Ecology,212,Environment destruction,1,Environment Ecology and Climage Change,1,Environment Ecology and Climate Change,410,Environment Ecology Climate Change,1,Environment protection,10,Environmental protection,1,Essay paper,611,Ethics and Values,26,EU,24,Europe,1,Europeans in India and important personalities,6,Evolution,4,Facts and Charts,4,Features of Indian economy,6,February 2020,25,February 2021,23,Federalism,2,Flora and fauna,3,Foreign affairs,491,Foreign exchange,8,Formal and informal economy,7,Fossil fuels,10,Fundamentals of the Indian Economy,10,Games SportsEntertainment,1,GDP GNP PPP etc,8,GDP-GNP PPP etc,1,GDP-GNP-PPP etc,4,Gender inequality,6,Geography,10,Global trade,10,Global treaties,1,Global warming,124,Goverment decisions,4,Governance and Institution,1,Governance and Institutions,638,Governance and Schemes,221,Governane and Institutions,1,Government decisions,192,Government Finances,2,Government Politics,1,Government schemes,327,GS I,93,GS II,66,GS III,38,GS IV,23,GST,8,Habitat destruction,2,Headlines,22,Health and medicine,1,Health and medicine,56,Healtha and Medicine,1,Healthcare,1,Healthcare and Medicine,73,Higher education,7,Hindu individual editorials,54,Hinduism,9,History,172,Honours and Awards,1,Human rights,230,IMF-WB-WTO-WHO-UNSC etc,1,Immigration,6,Immigration and citizenship,1,Important Concepts,52,Important Concepts.UPSC Mains GS III,3,Important Dates,1,Important Days,35,India,28,India Agriculture and related issues,1,India's Constitution,14,India's independence struggle,19,India's international relations,3,India’s international relations,7,Indian Agriculture and related issues,9,Indian and world media,4,Indian Economy,1080,Indian Economy – Banking credit finance,1,Indian Economy – Corporates,1,Indian Economy.GDP-GNP-PPP etc,1,Indian Geography,1,Indian history,28,Indian judiciary,112,Indian Politcs,1,Indian Politics,544,Indian Politics – Post-independence India,1,Indian Polity,1,Indian Polity and Governance,2,Indian Society,1,Indias,1,Indias international affairs,1,Indias international relations,19,Indices and Statistics,97,Indices and Statstics,1,Industries and services,9,Inequalities,2,Inequality,101,Inflation,26,Infra projects and financing,5,Infrastructure,231,Infrastruture,1,Institutions,1,Institutions and bodies,249,Institutions and bodies Panchayati Raj,1,Institutionsandbodies,1,Instiutions and Bodies,1,Intelligence and security,1,International Institutions,10,international relations,1,Internet,9,Inventions and discoveries,8,Irrigation Agriculture Crops,1,Issues on Environmental Ecology,3,IT and Computers,19,Italy,1,January 2020,26,January 2021,25,July 2020,5,July 2021,207,June,1,June 2020,45,June 2021,369,June-2021,1,Juridprudence,1,Jurisprudence,59,Jurisprudence Governance and Institutions,1,Land reforms and productivity,8,Latest Current Affairs,1049,Law and order,31,Legislature,1,Logical Reasoning,9,Major events in World History,16,March 2020,24,March 2021,23,Markets,170,Maths Theory Booklet,14,May 2020,24,May 2021,25,Meetings and Summits,23,Military and defence alliances,4,Military technology,7,Miscellaneous,454,Modern History,8,Modern historym,1,Modern technologies,22,Monetary and financial policies,9,monsoon and climate change,1,Nanotechnology,2,Nationalism and protectionism,6,Natural disasters,9,New Laws and amendments,32,News media,2,November 2020,22,Nuclear technology,11,Nuclear weapons,5,October 2020,24,Oil economies,1,Organisations and treaties,1,Organizations and treaties,1,Pakistan,2,Pandemic,134,Parks reserves sanctuaries,1,Parliament and Assemblies,11,People and Persoalities,1,People and Persoanalities,2,People and Personalites,1,People and Personalities,149,Personalities,46,Persons and achievements,1,Pillars of science,1,Planning and management,1,Political bodies,1,Political parties and leaders,20,Political philosophies,19,Political treaties,3,Polity,480,Pollution,49,Post independence India,12,Post-Governance in India,17,post-Independence India,39,Post-independent India,1,Poverty,44,Prelims,1982,Prelims CSAT,30,Prelims GS I,7,Prelims Paper I,135,Primary and middle education,5,Private bodies,1,Products and innovations,4,Protectionism and Nationalism,19,Racism,1,Rainfall,1,Rainfall and Monsoon,3,RBI,68,Reformers,2,Regional Conflicts,58,Regional Economy,13,Regional leaders,33,Regional leaders.UPSC Mains GS II,1,Regional Politics,116,Regional Politics – Regional leaders,1,Regionalism and nationalism,1,Regulator bodies,1,Regulatory bodies,41,Religion,32,Religion – Hinduism,1,Renewable energy,3,Reports,99,Reports and Rankings,119,Reservations and affirmative,1,Reservations and affirmative action,33,Revolutionaries,1,Rights and duties,11,Roads and Railways,3,Russia,1,schemes,1,Science and Techmology,1,Science and Technology,744,Science and Tehcnology,1,Sciene and Technology,1,Separatism and insurgencies,2,September 2020,26,September 2021,444,Social Issue,2,Social issues,1186,Social media,3,South Asia,5,Space technology,65,Startups and entrepreneurship,1,Statistics,4,Study material,280,Super powers,5,Super-powers,20,TAP 2020-21 Sessions,3,Taxation,36,Taxation and revenues,12,Technology and environmental issues in India,16,Telecom,1,Terroris,1,Terrorism,90,Terrorist organisations and leaders,1,Terrorist acts,8,Terrorist acts and leaders,1,Terrorist organisations and leaders,13,Terrorist organizations and leaders,1,The Hindu editorials analysis,58,Tournaments,1,Tournaments and competitions,5,Trade barriers,2,Trade blocs,1,Treaties and Alliances,1,Treaties and Protocols,18,Trivia and Miscalleneous,1,Trivia and miscellaneous,38,UN,106,Union budget,4,United Nations,4,UPSC Mains GS I,538,UPSC Mains GS II,3395,UPSC Mains GS III,2609,UPSC Mains GS IV,175,US,61,USA,2,Warfare,12,World and Indian Geography,24,World Economy,340,World figures,28,World Geography,15,World History,20,World Poilitics,1,World Politics,499,World Powers,1,WTO,1,WTO and regional pacts,2,अंतर्राष्ट्रीय संस्थाएं,10,गणित सिद्धान्त पुस्तिका,13,तार्किक कौशल,10,निर्णय क्षमता,2,नैतिकता और मौलिकता,24,प्रौद्योगिकी पर्यावरण मुद्दे,15,बोधगम्यता के मूल तत्व,2,भारत का प्राचीन एवं मध्यकालीन इतिहास,47,भारत का स्वतंत्रता संघर्ष,19,भारत में कला वास्तुकला एवं साहित्य,11,भारत में शासन,18,भारतीय कृषि एवं संबंधित मुद्दें,10,भारतीय संविधान,14,महत्वपूर्ण हस्तियां,6,यूपीएससी मुख्य परीक्षा,90,यूपीएससी मुख्य परीक्षा जीएस,117,यूरोपीय,6,विश्व इतिहास की मुख्य घटनाएं,16,विश्व एवं भारतीय भूगोल,24,स्टडी मटेरियल,265,स्वतंत्रता-पश्चात् भारत,14,
ltr
item
PT's IAS Academy: Arctic warming and severe winter weather - The link
Arctic warming and severe winter weather - The link
Understanding the impact of Stratospheric Polar Vortex (SPV)
https://1.bp.blogspot.com/-9Sbhd5POh-k/YTdjVV-APdI/AAAAAAAAi3I/ylkYiyrr-54h6DH6jBWDZdYfoMynTPxagCLcBGAsYHQ/s16000/6-1.jpg
https://1.bp.blogspot.com/-9Sbhd5POh-k/YTdjVV-APdI/AAAAAAAAi3I/ylkYiyrr-54h6DH6jBWDZdYfoMynTPxagCLcBGAsYHQ/s72-c/6-1.jpg
PT's IAS Academy
https://civils.pteducation.com/2021/09/Arctic-warming-and-severe-winter-weather-The-link-Prelims-UPSCMainsGSIII-EnvironmentandEcology-WorldGeography-GlobalWarming-September2021.html
https://civils.pteducation.com/
https://civils.pteducation.com/
https://civils.pteducation.com/2021/09/Arctic-warming-and-severe-winter-weather-The-link-Prelims-UPSCMainsGSIII-EnvironmentandEcology-WorldGeography-GlobalWarming-September2021.html
true
8166813609053539671
UTF-8
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow TO READ FULL BODHI... Please share to unlock Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy