Ocean atmospheric interaction on the cyclogenesis and rapid intensification of tropical cyclone Ockhi

Athira P. Ratnakaran and B. Abish ()
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Athira P. Ratnakaran: Kerala University of Fisheries and Ocean Studies
B. Abish: Kerala University of Fisheries and Ocean Studies

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2024, vol. 120, issue 8, No 20, 7498 pages

Abstract: Abstract Ockhi was a devastating tropical cyclone that struck parts of Sri Lanka, India, and the Maldives in November 2017. The storm began as a low-pressure system over the Bay of Bengal and rapidly intensified into a very severe cyclonic storm, causing havoc along its path. Interestingly, Ockhi was a rare storm to have rapid intensification over the Arabian Sea basin during its cyclogenesis stage. In this analysis, we examine the factors that influenced Ockhi’s genesis and rapid intensification. It is known that the warm core eddies have a potential role in the rapid intensification of tropical cyclones. However, in our study, it was observed that no warm core eddies were found along the track of tropical cyclone Ockhi during its rapid intensification. Thus, additional atmospheric and oceanic features that contribute to the development and intensification of tropical cyclones have been taken into account. A very high tropical cyclone heat potential of 60–90 kJ cm−2, an exceptionally high sea surface temperature anomaly of above 1–1.5 °C, and a high moist static energy of 340 × 103 J kg−1 or greater were observed to be persisting over the region where the intensification has taken place. The brightness temperature was

Keywords: Moist; static; energy.; Mesoscale; eddies.; Tropical; cyclone; Ockhi.; Tropical; cyclone; heat; potential (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s11069-024-06530-3

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