05:39 GMT24 June 2021
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    In the past few decades, the average number of cyclones to occur over the Arabian Sea and the Bay of Bengal has witnessed a significant rise. Government data suggests that there's been a 32 percent rise in the number of cyclones between 2014 and 2019.

    A team of scientists from India has successfully, after a decade-long study, discovered a promising technique for detecting tropical cyclones over the North Indian Ocean region much earlier than satellites.

    Under the ‘Climate Change Programme’ (CCP) launched by India’s Department of Science and Technology, three scientists - Jiya Albert, Bishnupriya Sahoo, and Prasad K Bhaskaran - from the Indian Institute of Technology (IIT) Kharagpur devised a new method which uses the Eddy detection technique.

    According to the Department of Science and Technology, the method developed by the scientists aims to identify initial traces of pre-cyclonic eddy vortexes in the atmospheric column and track its Spatio-temporal evolution.

    Scientists conducted a study on four post-monsoon severe cyclones -Phailin (2013), Vardah (2013), Gaja (2018), Madi (2013), and two pre-monsoon cyclones Mora (2017) and Aila (2009) that developed over the North Indian Ocean. They performed comprehensive research on the formative stages and advance detection time of tropical cyclogenesis in the North Indian Ocean’s Bay of Bengal (BoB) basin.

    After studying the behaviour of eddies in an atmospheric column for non-developing cases and developing cases, scientists observed that this new method could bring about the genesis of prediction with a minimum of four days (90 hours) lead time for cyclones developed during the pre-and post-monsoon seasons.

    "Early detection of Tropical cyclones has wide socio-economic implications. So far, remote sensing techniques have detected them the earliest. However, this detection was possible only after the system developed as a well-marked low-pressure system over the warm ocean surface. A larger time gap between the detection and the impact of the cyclone could help preparation activities," the government department said.

    The research was also published on the 'Science Direct' website.


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