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Cyclone Amphan
Super Cyclonic Storm Amphan was an extremely powerful and catastrophic tropical cyclone that caused widespread damage in Eastern India, specifically in West Bengal and Odisha, and in Bangladesh, in May 2020. It was the strongest tropical cyclone to strike the Ganges Delta. It was also the fourth super cyclone that hit West Bengal and Kolkata since 15 as well as being one of the strongest storms to impact the area. Causing over US$13 billion of damage, Amphan is also the costliest cyclone ever recorded in the North Indian Ocean, surpassing the record held by Cyclone Nargis of 2008. The first tropical cyclone of the 2020 North Indian Ocean cyclone season, Amphan originated from a low-pressure area persisting a couple hundred miles (300 km) east of Colombo, Sri Lanka, on 13 May 2020. Tracking northeastward, the disturbance organized over exceptionally warm sea surface temperatures; the Joint Typhoon Warning Center (JTWC) upgraded the system to a tropical depression on 15 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bay Of Bengal
The Bay of Bengal is the northeastern part of the Indian Ocean, bounded on the west and northwest by India, on the north by Bangladesh, and on the east by Myanmar and the Andaman and Nicobar Islands of India. Its southern limit is a line between Sangaman Kanda, Sri Lanka, and the north westernmost point of Sumatra, Indonesia. It is the largest water region called a bay in the world. There are countries dependent on the Bay of Bengal in South Asia and Southeast Asia. During the existence of British India, it was named as the Bay of Bengal after the historic Bengal region. At the time, the Port of Kolkata served as the gateway to the Crown rule in India. Cox's Bazar, the longest sea beach in the world and Sundarbans, the largest mangrove forest and the natural habitat of the Bengal tiger, are located along the bay. The Bay of Bengal occupies an area of . A number of large rivers flow into the Bay of Bengal: the Ganges– Hooghly, the Padma, the Brahmaputra–Yamuna, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclone Nargis
Extremely Severe Cyclonic Storm Nargis ( my, နာဂစ်, ur, نرگس ) was an extremely destructive and deadly tropical cyclone that caused the worst natural disaster in the recorded history of Myanmar during early May 2008. The cyclone made landfall in Myanmar on Friday, 2 May 2008, sending a storm surge 40 kilometres up the densely populated Irrawaddy River, Irrawaddy river delta, delta, causing catastrophic destruction and at least 138,373 fatalities. The Labutta Township alone was reported to have 80,000 dead, with about 10,000 more deaths in Bogale. There were around 55,000 people missing and many other deaths were found in other towns and areas, although the Myanmar State Peace and Development Council, government's official death toll may have been under-reported, and there have been allegations that government officials stopped updating the death toll after 138,000 to minimise political fallout. The feared 'second wave' of fatalities from disease and lack of relief e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hooghly District
Hooghly district () is one of the districts of the Indian state of West Bengal. It can alternatively be spelt ''Hoogli'' or ''Hugli''. The district is named after the Hooghly River. The headquarters of the district are at Hooghly-Chinsura (''Chuchura''). There are four subdivisions: Chinsurah Sadar, Srirampore, Chandannagore, and Arambagh. History The district of Hooghly derived its name from the town of Hooghly on the west bank of the Hugli River about 40 km north of Kolkata. This town was a major river port for trade in India before colonialism. The district has thousands of years of rich heritage as part of the Bengali kingdom of Bhurshut. The first European to reach this area was the Portuguese sailor Vasco da Gama. In 1536 Portuguese traders obtained a permit from Sultan Mahmud Shah to trade in this area. In those days the Hooghly River was the main route for transportation and Hooghly served as an excellent trading port. Within a few decades, the town of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South 24 Parganas
South 24 Parganas (Pron: pɔrɡɔnɔs; abbr. 24 PGS (S)), or sometimes South Twenty Four Parganas and Dakshin 24 Parganas, is a district in the Indian state of West Bengal, headquartered in Alipore. It is the largest district of West Bengal by area and second largest by population. It is the sixth most populous district in India (out of 640). On one side of the district there is the urban fringe of Kolkata, and on the other the remote riverine villages in the Sundarbans. History Originally, the capital of Raja Bikramaditya and Maharaja Pratapaditya was at Dhumghat. Later it was transferred to Ishwaripur (Originated from the name Jeshoreshwaripur). Maharaja Pratapaditya declared the independence of South Bengal from the Mughal Empire. Pratapaditya's father Shrihari (Shridhar), a Kayastha, was an influential officer in the service of Daud Khan Karrani. Upon the fall of Daud, he fled with the government treasure in his custody. He then, in 1574, set up a kingdom for himsel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North 24 Parganas District
North 24 Parganas (abv. 24 PGS (N)) or sometimes North Twenty Four Parganas is a district in southern West Bengal, of eastern India. North 24 Parganas extends in the tropical zone from latitude 22° 11′ 6″ north to 23° 15′ 2″ north and from longitude 88º20' east to 89º5' east. Barasat is the district headquarters of North 24 Parganas. North 24 Parganas is West Bengal's most populous district and also (since 2014) the most populated district in the whole of India. It is the tenth-largest district in the State by area. History British Raj The territory of Greater 24 Parganas were under the Satgaon (ancient Saptagram, now in Hoogly district) administration during the Mughal era and later it was included in Hoogly chakla (district under post-Mughal Nawabi rule) during the rule of Murshid Quli Khan. In 1757, after the Battle of Plassey, Nawab Mir Jafar conferred the Zamindari of 24 parganas and janglimahals (small administrative units) upon the British East India Compan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Midnapore
Purba Medinipur (English: ''East Medinipur'', alternative spelling ''Midnapore'') district is an administrative unit in the Indian state of West Bengal. It is the southernmost district of Medinipur division – one of the five administrative divisions of West Bengal. The headquarters in Tamluk. It was formed on 1 January 2002 after the Partition of Medinipur into Purba Medinipur and Paschim Medinipur which lies at the northern and western border of it. The state of Odisha is at the southwest border; the Bay of Bengal lies in the south; the Hooghly river and South 24 Parganas district to the east; Howrah district to the north-east; Paschim Medinipur district to the west. Purba Medinipur is formed of the sub-divisions of Tamluk, Contai and Haldia of erstwhile Medinipur district. Another sub-division, Egra has been created out of the erstwhile Contai sub-division during the partition of Medinipur. In 2011, the state government has proposed to rename the district as Tamralipta di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landfall
Landfall is the event of a storm moving over land after being over water. More broadly, and in relation to human travel, it refers to 'the first land that is reached or seen at the end of a journey across the sea or through the air, or the fact of arriving there. Tropical cyclone A tropical cyclone is classified as making landfall when the center of the storm moves across the coast; in a relatively strong tropical cyclone, this is when the eye moves over land. This is where most of the damage occurs within a mature tropical cyclone, such as a typhoon or hurricane, as most of the damaging aspects of these systems are concentrated near the eyewall. Such effects include the peaking of the storm surge, the core of strong winds coming ashore, and heavy flooding rains. These coupled with high surf can cause major beach erosion. When a tropical cyclone makes landfall, the eye usually closes in upon itself due to negative environmental factors over land, such as friction with the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wind Shear
Wind shear (or windshear), sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical or horizontal wind shear. Vertical wind shear is a change in wind speed or direction with a change in altitude. Horizontal wind shear is a change in wind speed with a change in lateral position for a given altitude. Wind shear is a microscale meteorological phenomenon occurring over a very small distance, but it can be associated with mesoscale or synoptic scale weather features such as squall lines and cold fronts. It is commonly observed near microbursts and downbursts caused by thunderstorms, fronts, areas of locally higher low-level winds referred to as low-level jets, near mountains, radiation inversions that occur due to clear skies and calm winds, buildings, wind turbines, and sailboats. Wind shear has significant effects on the control ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eyewall Replacement Cycle
In meteorology, eyewall replacement cycles, also called concentric eyewall cycles, naturally occur in intense tropical cyclones, generally with winds greater than , or major hurricanes ( Category 3 or above). When tropical cyclones reach this intensity, and the eyewall contracts or is already sufficiently small, some of the outer rainbands may strengthen and organize into a ring of thunderstorms—a new, outer eyewall—that slowly moves inward and robs the original, inner eyewall of its needed moisture and angular momentum. Since the strongest winds are in a tropical cyclone's eyewall, the storm usually weakens during this phase, as the inner wall is "choked" by the outer wall. Eventually the outer eyewall replaces the inner one completely, and the storm may re-intensify. The discovery of this process was partially responsible for the end of the U.S. government's hurricane modification experiment Project Stormfury. This project set out to seed clouds outside the eyewall, appa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central Pressure
Atmospheric pressure, also known as barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as , which is equivalent to 1013.25 millibars, 760mm Hg, 29.9212 inchesHg, or 14.696 psi.International Civil Aviation Organization. ''Manual of the ICAO Standard Atmosphere'', Doc 7488-CD, Third Edition, 1993. . The atm unit is roughly equivalent to the mean sea-level atmospheric pressure on Earth; that is, the Earth's atmospheric pressure at sea level is approximately 1 atm. In most circumstances, atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. As elevation increases, there is less overlying atmospheric mass, so atmospheric pressure decreases with increasing elevation. Because the atmosphere is thin relative to the Earth's radius—especially the dense atmospheric layer at low altitudes—the Earth's gra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rapid Intensification
In meteorology, rapid intensification is a situation where a tropical cyclone intensifies dramatically in a short period of time. The United States National Hurricane Center defines rapid intensification as an increase in the maximum sustained winds of a tropical cyclone of at least in a 24-hour period. Necessary conditions External In order for rapid intensification to occur, several conditions must be in place. Water temperatures must be extremely warm (near or above ), and water of this temperature must be sufficiently deep such that waves do not churn deeper cooler waters up to the surface. Wind shear must be low; when wind shear is high, the convection and circulation in the cyclone will be disrupted. Dry air can also limit the strengthening of tropical cyclones. Internal Usually, an anticyclone in the upper layers of the troposphere above the storm must also be present for extremely low surface pressures to develop. This is because air must be converging towards the low p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
India Meteorological Department
The India Meteorological Department (IMD) is an agency of the Ministry of Earth Sciences of the Government of India. It is the principal agency responsible for meteorological observations, weather forecasting and seismology. IMD is headquartered in Delhi and operates hundreds of observation stations across India and Antarctica. Regional offices are at Chennai, Mumbai, Kolkata, Nagpur, Guwahati and New Delhi. IMD is also one of the six Regional Specialised Meteorological Centres of the World Meteorological Organisation. It has the responsibility for forecasting, naming and distribution of warnings for tropical cyclones in the Northern Indian Ocean region, including the Malacca Straits, the Bay of Bengal, the Arabian Sea and the Persian Gulf. History In 1686, Edmond Halley published his treatise on the Indian summer monsoon, which he attributed to a seasonal reversal of winds due to the differential heating of the Asian landmass and the Indian Ocean. The first meteorological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
