Arabian Sea Heats Up, Hurricanes Increase; Researchers have found the cause

For Bhadra chandran

A new study shows that the frequency, duration and intensity of hurricanes in the Arabian Sea increased between 2001 and 2019. Studies show that the frequency of hurricane formation in the Arabian Sea increased by 52% between 2001-2019 compared with 1981-2000. The number of severe hurricanes increased by 150% during the same period. At the same time, studies have shown that the Bay of Bengal, the source of most hurricanes, lost 8% of its frequency during the same period. Scientists at the Indian Institute of Tropical Meteorology in Pune, who conducted the study, told the Times of India that rising ocean temperatures due to global warming are causing frequent cyclones in the Arabian Sea. But the Bay of Bengal is warming, but not as hot as the Arabian Sea, says IITM scientist Roxie Mathews Cole. During the same period, the intensity of hurricanes that formed after the monsoon increased by 20%. The study also found that the energy of intermittent hurricanes nearly tripled. The duration of hurricanes in the Arabian Sea increased by 80% and the duration of severe hurricanes nearly tripled during the same period. But there has been no such increase in the Bay of Bengal. It is important to highlight the increase in hurricanes that formed in the Arabian Sea during the months of May, June and October. The increase in humidity due to the ocean temperature is the main reason for the formation of hurricanes during these months. “Ocean temperatures will give the hurricane more energy and help keep it warm and humid for longer,” said Rocky Cowie. Cyclones are now forming in the Arabian Sea on a slightly smaller scale than before. But studies show that if the weather is favorable in the western region, it will take time for these hurricanes to intensify. All the hurricanes that have formed in the Arabian Sea in the last four years have been severe hurricanes (wind speeds ranging from 89 km / h to 117 km / h). Examples include Hurricane Mekanu in 2018, Hurricane Air in 2019, Hurricane Nisarga in 2020, and Toute in 2021. In 2019 alone, four hurricanes formed in the Arabian Sea. – Air, Hickey, Carr, Maha. It was also the year with the most hurricanes in recent memory. Climatically, studies show that five hurricanes are recorded each year in the northern Indian Ocean region, which includes the Arabian Sea and the Bay of Bengal. They are active during the months of May and November. Typhoon Toute, which formed in May, moved north along Lakshadweep and made landfall off the coast of Gujarat. The hurricane maintained its intensity for 24 hours. Heavy rains and winds caused severe damage in Rajasthan, Delhi and Uttar Pradesh. Typhoon Toute caused power outages in wards treating Kovid-19 patients at Goa Medical College, much to the chagrin of hospital officials and patients. It then resumed operations with a backup power supply. Trees fell in various parts of the state after the cyclone. According to the Karnataka State Disaster Management Authority, 73 villages were affected by the cyclone. Four people lost their lives. Frequent hurricanes in the Arabian Sea wreak havoc with each arrival. That is why scientists take this topic very seriously and constantly conduct studies. ****

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