According to the India Meteorological Department (IMD), Cyclone Nivar, which crossed the TN coast as a very severe cyclonic storm with wind speeds of 120 kmph and rain-filled, further weakened as it moved inland. There are three elements associated with cyclones that cause destruction during its occurrence. However, the most damaging winds and heaviest rain are all concentrated within the innermost 200km of the storm. When cyclonic circulation is sufficiently developed with a strong surface depression, a weak downdraft is established at the centre of the disturbance. Before becoming a freelance writer, Adrianne worked for many years as a Marine Aquaculture Research Technician with Plant & Food Research in New Zealand. On the night of 25 November, at 11.30pm, cyclone Nivar began its landfall at Puducherry on the Tamil Nadu coast. A severe cyclonic storm (SCS) with wind speeds of 120-30 kmph, according the India Meteorological Department (IMD), Nivar finished making landfall at 2.30am on 26 November. More on the news: Red alert issued in TN and Puducherry : The India Meteorological Department has forecast the development of a cyclone in the Southwest region of the Bay of Bengal, off Tamil Nadu coast. (i) A warm sea temperature in excess of 26 degrees centigrade to a depth of 60 m, which provides abundant water vapour in the air by evaporation. Explanation: My opinion based on the work I have done is that I have learned that a Tropical cyclone can damage your life severely but overtime it will get better, and it can be formed from a simple thunderstorm then gradually draw more energy to itself to attain the name Tropical Cyclone a deadly natural disaster/hazard like bushfires or floods. The estimates of Chennai civic officials reported that flood water entered around 40,000 homes within the borders of the corporation. The spatiotemporal distributions and physical-optical properties of aerosols are of great scientific significance for the study of climate change and atmospheric environment. In the North Pacific Ocean, the same type of weather . Cyclone Disaster Management encompasses mitigation and preparedness measures for cyclones. Between these two periods, the Indian monsoon generates strong upper winds, which are unfavourable to the development of cyclones. Whilst intense storms are very common throughout the Tropics, tropical cyclones need a very specific set of ingredients in order to form. As the system develops the Earths rotation acts on the inrushing winds, deflecting them into a pattern that rotates about the centre of the storm, spiralling in towards the centre. Can you chart the course of cyclone Nivar? On March 11, 2005, a greatly-weakened Ingrid re-emerged over open water in the Gulf of Carpentaria. These rainbands can produce heavy rain and strong winds. Cyclone Nivar has caused devastation, injuries and fatalities after making landfall in southern India where torrential rainfall has lashed coastal areas of the union territory of Puducherry and Tamil Nadu state. The Core is the region, a few hundred kilometres wide, where the air follows closed trajectories around the low pressure centre. In the southern hemisphere, 10 depressions and storms, 5 cyclones are observed during the southern summer and autumn over the southwestern Indian Ocean. The Bay of Bengal will see its second Severe Cyclone of the year, after Super Cyclone Amphan formed in May. : 07AADCF4830D1Z0, Bills and Acts Tracker for UPSC IAS Examination, History and Art & Culture articles in News, Prelims 2022 Study Material- Learn with ForumIAS, Monthly Current Affairs For UPSC PDF Download, Prelims 2022 Study Material- Learn with ForumIAS , [Download] KRITIKA SHUKLA AIR 123 (UPSC CSE 2021) MGP Test Copies + Testimonial, [Download] Vivek Tiwari AIR 164 (UPSC CSE 2021) MGP Test Copies + Testimonial, [Download] Utsav Pandey AIR 240 (UPSC CSE 2021) MGP Test Copies + Testimonial, Shraddha Gome IAS Rank 60 (UPSC CSE 2021) Testimonial, Rahul Raiya CSE Rank 359 (UPSC CSE 2021) Testimonial, IAS Rank 1 Anudeep D Testimony & Copies , Fighting Depression in Times of UPSC Preparation ( & Corona ) , Guide : How to crack IAS without exhauting attempts, History | Art and Culture Updates and News, International Relations News and Updates. In contrast to the light wind conditions in the eye, the turbulent cloud formation extending outwards from the eye accompany winds of up to 250 kmph, sufficient to destroy or severely damage most non-engineered structures in the affected communities. Figure 7. The Hindustan Timesreported that independent scientists said warming of oceans due to climate change was leading to more intense cyclones and dangerous storm surges in the Bay of Bengal. The green arrows show where warm air is rising. In simple terms, a cyclone acts like an engine. A few tropical cyclones interact with the westerly circulation and evolve into a mid-latitude (baroclinic)storm. The values obtained are in good agreement with the extremes observed, showing that this cycle represents an energy optimum for tropical cyclones. A pre-existing disturbance in the atmosphere. The Saffir-Simpson Hurricane Wind Scale is a 1 to 5 rating based on a hurricane's sustained wind speed. By . Admission Process; Fee Structure; Scholarship; Loans and Financial aid; Programs. The Encyclopedia of the Environment by the Association des Encyclopdies de l'Environnement et de l'nergie (www.a3e.fr), contractually linked to the University of Grenoble Alpes and Grenoble INP, and sponsored by the French Academy of Sciences. They include a number of different hazards that can individually cause significant impacts on life and property, such as storm surge, flooding, extreme winds, tornadoes and lighting. At 8.30am, it was around 240km east-southeast of Cuddalore, which is about 300km southeast of Puducherry and 350km south southeast of Chennai, the India Meteorological Department ( IMD ) said. This refers to rapid storms which propagate in a circular manner that has a low pressure center and is associated with strong, violent winds and can cause massive devastation. These triggers can include old weather fronts, lines of convergence or disturbed weather, and tropical easterly waves, to name a few. Tropical storms that form over the Indian and South Pacific Oceans get the generic term cyclones. They are largely deployed for floods, cyclones, building collapse and earthquakes in India. What are the characteristics of aerosols in constant high humidity? At ForumIAS, we have a dream. The colours represent the intensity of precipitation from satellite observations in a microwave channel. There are 4 stages of development to a Hurricane: The most common storms start out as a Tropical Wave with wind speeds of less than 25 mph. 24 Nov, 2020, 01.22 PM IST Abstract and Figures Tropical storms form in the Bay of Bengal every year during the pre-monsoon season, affecting the coastal communities and the marine ecosystem. (iv) A location of at least 4-5 latitude degree from the equator allows the influence of the forces due to the earths rotation to take effect in reducing cyclonic wind circulation around low-pressure centres. If you can it would be an excellent test of both numeracy and your knowledge of latitude and longitude. Register for a FutureLearn account to get personalised course recommendations and offers straight to your inbox. arayanasamy said all business establishments have been asked to close this evening and remove the high-rise advertisement boards. by Cheryl Kahla. At high altitudes, the descending air is hot and dry. It is the largest singular and specialised disaster force in the world. After making landfallat around 10.30 pm on 25 November,cyclone Nivarweakenedfrom very severetoonly a severe cyclonic storm and movednorthwardsinland. Table 1 shows the Beaufort Scale and includes descriptions of conditions for a given Beaufort force over both land and sea. A western Pacific tropical cyclone, Hagibis, underwent explosive intensification. All types of tropical storms require four conditions to form. Development of all tropical systems is dependent on the ability to create vertical flow over 10's of thousands of feet in altitude. As the system starts to form, evaporation from the ocean surface acts as the source of heat and moisture for the formation of deep clouds. Wind speed is the determining factor in the scale, as storm surge values are highly dependent on the slope of the continental shelf and the shape of the coastline in the landfall region. HIRE OUR VENUE The above figure shows how cyclones form. Thankfully cyclones are rather inefficient engines, converting less than 10% of the available heat energy from condensation in the clouds into the mechanical energy of the motion of the winds. [15] Five people were reported dead in Tamil Nadu. Wind speed then determines whether a thunderstorm develops into a depression, storm or cyclone. [1] Clockwise rotation movement in the southern hemisphere, counter-clockwise in the northern hemisphere. Hurricane Gonzalo Eyewall Replacement Cycle (October 14-17, 2014). First is a ring-shaped outer region, typically having an outer radius of about 160 km (100 miles) and an inner radius of about 30 to 50 km (20 to 30 miles). Home All but strictly necessary cookies are currently disabled for this browser. You can specify conditions of storing and accessing cookies in your browser, DISCUSS THE STAGES OF DEVELOPMENT OF THE TROPICAL CYCLONE NIVAR. UsethisAdministrative map of India Nations Online Project(which helpful identifies Puducherry, where cyclone Nivar made landfall)andthis table dataWeather Underground,to chart how this tropical storm developed. This effect leads to a temporary decrease in the intensity of the cyclone when the Eyewall progressively dissipates, before a new intensification when the external bands have gradually organized themselves into a new Eyewall. As thunderstorm cells develop, a large warm anomaly forms at altitude in the central part of the cluster. Gradually, the atmosphere warms and humidifies. Very Severe Cyclonic Storm Nivar was a tropical cyclone which brought severe impacts to portions of Tamil Nadu and Andhra Pradesh in late November 2020. A result of the mechanism for development described here is that the most severe weather, the heaviest rain and strongest winds, is strongly focused in the centre of the cyclone. Please help update this article to reflect recent events or newly available information. The development of tropical cyclones is a complex process and is still the subject of much research. In the Eyewall of cumulonimbus clouds, which surrounds the eye a few tens of kilometres from the circulation centre, there are powerful vertical motions with the highest precipitation, organised in narrow spiral bands or rings, and the strongest winds frequently reach 200 km/h, sometimes exceeding 300 km/h. What are cyclones, hurricanes and typhoons? The storm developed as Tropical Depression Eight. A cyclone is an area of low pressure around which winds move counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. In news. On November 25, 2020, severe. discuss the stage of development of the tropical cyclone nivar. Tropical cyclones only form over oceans, never over land, as they need sources of both heat and moisture. 1 Kensington Gore, We will not use your details for marketing purposes without your explicit consent. The disturbance gradually organized and on November 23, both the Joint Typhoon Warning Center (JTWC) and the India Meteorological Department (IMD) reported that a tropical depression has formed. . Long bands of precipitation, locally intense and a few tens of kilometres wide, extend mainly eastward in the convergence zone between cyclonic circulation and the easterly trade winds that prevail in the tropics. The formation of downdrafts by cooling due to evaporation becomes more difficult and they are displaced into the periphery of the storm cluster, a few hundred kilometres away. Subsequently, Cyclone Nivar weakened into a cyclonic storm and further into a deep depression, centered about 50 km west-southwest of Tirupati. Each year, 80 to 90 tropical storms occur during the summer and early fall, about half of which develop into cyclones. Carried by powerful updrafts to an altitude of about 15 kilometres, the cloudy air moves away from the centre of the cyclone in a divergent and anticyclonic movement, and loses energy by thermal radiation towards space. Above the oceans just north and south of the equator, a weather phenomenon called a tropical cyclone can develop that can drastically alter the physical and cultural landscape if it reaches land. The northern hemisphere is by far the largest, due to the absence of cyclones over the South Atlantic and South-East Pacific, where the ocean is not warm enough. The development of cycle of tropical cyclones may be divided into three stages. Advice from the NDRF was broadcastin 3 simplepieces of information;Areyoucyclone ready? Tropical Depression Nine appeared at the same time as Eight but was much quicker to develop. There were an estimated 175,000 people in rescue sheltersbyWednesday night, 25 November. Out of these six, five of them coincided with La Nina like conditions in the Pacific.. Rapid heating of the landmasses during the spring and early summer exaggerates the passage of the seasonal cycle in these areas. A TropicalDisturbance is a persistent thunderstorm region with moderate winds that outline an overall rotation. The stronger wind at this location increases surface friction and moisture input, which shifts the Eyewall inward. On the next day, both agencies upgraded the system to a tropical storm, with the latter assigning it the name Nivar. [18] In Nellore district, Paddy seedlings in 2500 hectares drowned and in Prakasam district, standing crops in 34,000 hectares were damaged. The force causes a greater deflection of the air (right in the northern hemisphere and . What time will we have next weekend? Rain is a serious problem for the people which become shelter less due to cyclone. These cloud columns eventually cluster together, forming into thunderstorms. houseboat netherlands / brigada pagbasa 2021 memo region 5 / discuss the stage of development of the tropical cyclone nivar. [3] Pseudo-force directed perpendicular to the direction of movement of a moving body in a uniformly rotating environment. Disclaimer 9. The government should consider the NDMA Guidelines for the management of cyclones: With the adverse Climate Change risks posted by IPCC reports the only option for India is to better preparedness for the disaster with better urban planning, community awareness, etc. This scale is used to estimate the potential property damage and flooding expected along the coast from a hurricane landfall. Above 30 degrees latitude on average, cyclones weaken when theyarrive on continents or overwaters that are no longer warm enough to sustain the energy cycle, or by suffering the effects of wind shear stronger at mid-latitudes which distorts their vertical structure. TheNDRFis a disaster-response agency in India. Stages of Formation: Tropical Cyclones. Copy. This cycle continues, making cloud columns spin faster and wind speeds increase. The northern Indian Ocean accounts for only 5% of the world total, but due to the shallow depth of the Bay of Bengal, low coastal elevations and high population densities, they often cause considerable damage. Strong winds causing a shear at altitude (25000 to 60000+ feet) interrupts that flow minimizing development. 2023 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. . Chennai received continuous downpours on 23,24,25 November 2020 with IMD Chennai recording 163mm ending 25 November 8:30 AM IST. The largest losses of human life due to weather events are also associated with these systems, with death tolls sometimes into the 100s and even 1000s. This deep cloud often forms an almost circular ring called the eyewall around the very centre of the storm which is itself free from clouds. Tropical Cyclone Eloise, a category 2 storm, made landfall in the first hours of 23 January 2021, 20km south of the Beira City in Sofala Province, bringing winds of 140km/h and wind gusts of. Beyond that, it is a "Tropical Cyclone", also called a "Hurricane" on the Atlantic and northeast Pacific, a "Typhoon" on the northwest Pacific. Under less favourable conditions, a larger proportion of the wet flow in the lower layers penetrates into the eye, moistens and cools it. Tropical waves are particularly important in the creation of tropical cyclones--60% of Atlantic cyclones (85% of the intense ones) form from these weather disturbers. [5] Measures were taken by the Tamil Nadu government to store dry rations and fuel for the people after the cyclone's impact. The wind blows increasingly strong, collecting moisture and heat from the ocean surface, which feeds the storm updrafts, warms the atmosphere, reduces surface pressure and intensifies the vortex. Latitudes greater than 5 north or south of the equator. If the winds continue to increase to sustained gale strength (34 knots or 63 km/h) the NHC upgrades the system to a tropical storm. A Tropical Wave becomes a Tropical Depression when there is a presence of a closed circulation or rotation and sustained winds of 25 mph. This is zero on the equator itself and only becomes large enough to generate rotation within a weather system poleward of 5 of latitude. At a Glance. This includes information on how they are named and categorised, maps of the tracks of all cyclones since 1992, notes on how the storms are forecast and links to information on how climate change may affect the formation of these systems in the future. Hurricane Alex, the first major hurricane to enter Canadian waters in over 20 years*, was a Category 3 storm as it moved into Canadian waters. Combined, these hazards interact with one another and substantially increase the potential . Read about Amphan and few basics in ForumIAS blog by clicking here. A cyclone can lead to a huge loss oflife andproperty, especially in low-lying areas. Sometimes, the eye disappears as it approaches the island, and reappears a few hours later, several tens of kilometres in the wake of the obstacle. Met Office: Development of Tropical Cyclones. The Saffir-Simpson Hurricane Scale is a five-point rating scale used to describe a hurricane's present intensity. Originally a low-pressure system north of the Gulf of Carpentaria, Ingrid moved eastward and developed into a tropical cyclone in the Coral Sea on 6 March 2005. The different stages of the development of a tropical cyclone includes: This refers to rapid storms which propagate in a circular manner that has a low pressure center and is associated with strong, violent winds and can cause massive devastation. Tropical cyclone, also called typhoon or hurricane, an intense circular storm that originates over warm tropical oceans and is characterized by low atmospheric pressure, high winds, and heavy rain.Drawing energy from the sea surface and maintaining its strength as long as it remains over warm water, a tropical cyclone generates winds that exceed It was the first hurricane on record in the Atlantic to reach the Category 3 level at such a northern latitude. Communications & Marketing Professional. The change in the distribution of storm activity temporarily disrupts the cyclones dynamics. Tamil Nadu government suspended bus services until further orders in seven districts of Thiruvarur, Nagapattinam, Pudukkottai, Thanjavur, Viluppuram, Chengalpattu and Cuddalore. Image Courtesy : upload.wikimedia.org/wikipedia/commons/c/cd/India_relief_location_map.jpg. Looking down upon them from space, tropical storms look like a gigantic whirlpool of clouds. What is significant about where the solutions for Lake Chad are coming from? India: Cyclone Nivar makes landfall bringing rains, flood | India | Al Jazeera, Cyclone Nivar: Emergency ban on gatherings declared as storm bears down on Indian city | The Independent, Cyclone Nivar: Landfall triggers torrential downpours - BBC News, Cyclone Nivar: One dead and torrential rains as huge storm makes landfall in India | The Independent, Cyclone Nivar: Prohibitory orders clamped in Puducherry to restrict movement of people (nationalheraldindia.com), Cyclone Nivar: Tens of thousands evacuated in southeast India | News | DW | 25.11.2020, Cyclone Nivar live updates | Over 1,000 trees uprooted, say officials - The Hindu. This inrushing air near the surface results in strong winds which increase the evaporation from the ocean surface. SITE MAP, Cookies on the RGS website Even if the surface waters are very warm, the strong winds in a developing cyclone cause mixing of the surface layer of the ocean, bringing water up from below the surface. Nivar will be the second cyclone to hit Tamil Nadu in two years after Cyclone Gaja in 2018. Following four atmospheric and oceanic conditions are necessary for development of a cyclonic storm. It particularly effectedChennai inTamil Nadu andAndhra Pradeshfurther up the coast. Stages of Formation: Tropical Cyclones The development cycle of tropical cyclones may be divided into three stages: Formation and Initial Development Stage The formation and initial development of a cyclonic storm depends upon the transfer of water vapour and heat from the warm ocean to the overlying air, primarily by evaporation from the sea . A cyclone is taking shape in the North Indian Ocean region. When tropical cyclones reach land, giant waves and strong winds can cause large-scale damage and flooding. Whether you need help solving quadratic equations, inspiration for the upcoming science fair or the latest update on a major storm, Sciencing is here to help. Tropical Storm Ingrid was a weak storm. Near the surface, the wind is slowed by friction on the ocean and tangential acceleration cannot compensate for the force that attracts air to the central depression. Tropical storms can reach up to 400 miles wide and up to five miles high. Today thousands of aspirants have joined the elite services such as IAS, IPS, IFS, IRS and other central and state services with the right inputs provided by ForumIAS. These intense rainbands move towards the eyewall and take on its moisture and momentum, ultimately weakening the entire cyclone or replacing the inner eyewall and enabling the storm to continue or become stronger. In the year 1875, the Government of India established the India Meteorological Department, bringing all meteorological work in the country under a central authority. The result is a tendency for the Eyewall to gradually shrink. Therefore, there are different stages of a tropical cyclone and they are: Tropical disturbance, [3], On 24 November, six National Disaster Response Force (NDRF) teams have been posted to Cuddalore and two teams will be deployed in Chennai. As the heated air column is lighter, the surface pressure gradually decreases. Many factories, offices and commercial establishments remained closed in and around Chennai on Thursday as the very severe cyclonic storm Nivar, crossed the Tamil Nadu and Puducherry coasts. The cyclone brought heavy to very heavy rains over north coastal Tamil Nadu starting 23 November 2020. * Debbie (1982) had been the last major hurricane to affect Canadian waters before the arrival of Alex, more than 20 years later. But why does an eye form? This involves evaporation of water from the ocean surface, condensation within clouds and strong rising motion within the clouds that in turn leads to stronger surface winds and more evaporation. As this air moves up and away from the ocean surface, it leaves is less air near the surface. Alex eventually strengthened to a Category 3 hurricane as it moved through Canadian waters. Its name indicates which ocean it isin. For the storm clouds to turn into a cyclone, wind shear, the speed at which high-level winds blow clouds away, must be low. Cyclone Nivar - Important Facts. An example of acompletecyclone trackermap The India Meteorological Departmentis belowtoillustratehowit should look. While the winds may be tame in comparison with a hurricane, rainfalls of 100-200 mm are not uncommon. 322166814/www.reference.com/Reference_Desktop_Feed_Center6_728x90, The Best Benefits of HughesNet for the Home Internet User, How to Maximize Your HughesNet Internet Services, Get the Best AT&T Phone Plan for Your Family, Floor & Decor: How to Choose the Right Flooring for Your Budget, Choose the Perfect Floor & Decor Stone Flooring for Your Home, How to Find Athleta Clothing That Fits You, How to Dress for Maximum Comfort in Athleta Clothing, Update Your Homes Interior Design With Raymour and Flanigan, How to Find Raymour and Flanigan Home Office Furniture. [Source: http://www.atmos.umd.edu/~stevenb/hurr/]The Eye of the cyclone is a clear and dry area at medium and high altitude, often loaded with clouds in the lower layers where the air is almost saturated with moisture. If you would like to learn more about the distinction between theseclassifications,theBBC BitesizewebpageWhat are cyclones, hurricanes and typhoons? wayfair cashback chase. Rainwater entering houses was also seen in some places in the western suburbs. When storms move into larger vertical wind speed environments, or areas with low sea temperatures, dry conditions or other changes in wind speeds, the storms can break up. In the North Atlantic Ocean and the Caribbean Sea, this weather pattern is called a hurricane. Hence, predicting the evolution of a cyclone is difficult, even in the short term. Cyclone Nivar is the second cyclone to form over the Bay of Bengal this year after Super Cyclone Amphan. We believe learning should be an enjoyable, social experience, so our courses offer the opportunity to discuss what youre learning with others as you go, helping you make fresh discoveries and form new ideas. A tropical cyclone begins to weaken in terms of its central low pressure, internal warm core and extremely high winds as soon as its source of warm moist air being to ebb or are abruptly cut off. Advice from the NDRF was broadcast in 3 simple pieces of information; Are you cyclone ready? (ii) High relative humidity of the atmosphere to a height of above 7,000 m facilitates condensation of water vapour into water droplets and clouds, releases heat energy thereby inducing a drop in pressure. Saffir-Simpson Scale: The Beaufort Scale classifies all ocean storms with surface-level winds above 32.7 m s -1 as hurricanes. Then, surface winds increase in strength, reaching gale force, and the tropical cyclone enters the prematurity stage. Create an account to receive our newsletter, course recommendations and promotions. These are: ForumIAS is Indias leading Online website for UPSC IAS Exam Online Preparation and guidance. The force that attracts air to the low pressure centre is balanced by the Coriolis force and by the centrifugal acceleration of an overall cyclonic movement, reinforced by the aggregation of the various successively created eddies. When the cyclone hits land, especially over mountainous or hilly terrain, riverine and flash flooding may last for weeks. Small variations in the vertical wind speed; A pre-existing weak low-pressure area or low-level-cyclonic circulation is must for cyclone formation in tropics. PGDM; Specialisations. The upward movement induces a compensatingdownward movement in the Eyeand an acceleration of the surface windat a distance a little closer to the circulation centre. It was suggested by Iran. By Posted split sql output into multiple files In tribute to a mother in twi It is likely to hit Tamil Nadu coast by midweek. come dine with me county durham tina nesbitt. All types of tropical storms form in the same way, starting with a tropical disturbance. [Source: NRL Monterey Marine Meteorology Division http://www.nrlmry.navy.mil/TC.html]In relation to such processes, or as a result of external influences such as atmospheric variations in pressure, wind or humidity, the presence of cold or hot ocean currents or eddies, tropical cyclones are subject to more or less rapid changes in intensity. A cyclone is the same as a hurricaneor typhoon. The development cycle of tropical cyclones may be divided into three stages: Formation and Initial Development Stage. As the winds move away, the air pressure drops, making the warm air on the water's surface rise to form more thunderstorms. All of the systems described here have emphasised the greater intensity of the weather patterns in the Tropics which is a response to the large amounts of energy received from the Sun at tropical latitudes. While considering the limitations of outside countries and agencies to help in Africa, what initiatives might be successful. Mr. H. F. Blanford was appointed Meteorological Reporter to the Government of India. It is not subject to the Government of Canada Web Standards and has not been altered or updated since it was archived. It basically consists of fast winds spinning around a low-pressure depression, with the winds blowing in opposite directions. The eighth depression and fourth named storm of the 2020 North Indian Ocean cyclone season, Nivar originated from a disturbance in the Intertropical Convergence Zone. Finally, 10 depressions and storms, and 5 cyclones occur annually over the southwest Pacific. This site is using cookies under cookie policy . Their organization, highlighted in the above photograph taken from the International Space Station (Hurricane Katrina, August 2005), is influenced by aninterplay between dynamics and thermodynamics. It is important for both the geography and the disaster management topics in . The tropical cyclone struck Puducherry,adistrictin Tamil Nadu,with apopulation of1.6 millionpeople. It is originated in the Bay of bengal; According to a recent update from the India Meteorological Department the cyclonic storm NIVAR over southwest Bay of Bengal has burgeoned into a 'severe cyclonic storm' and lay 370 km east southeast of Chennai and 310 km southeast of Puducherry
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