Tropical cyclones over north Indian Ocean during El-Nino Modoki years
Abstract
Tropical cyclones are the most hazardous weather systems, which form over warm ocean waters. The frequencies of tropical cyclones show variabilities over all the oceanic basins, during the El-Nino and El-Nino Modoki years. Recent studies have shown significant impact of air–sea interaction processes like El-Nino and El-Nino Modoki on the cyclone activity over different ocean basins. The results suggest in most cases, El-Nino events suppress the formation of cyclones over various basins. A recent study indicated that concurrent occurrence of El-Nino Modoki and positive Indian Ocean dipole (IOD) events can generate more cyclones over north-west Pacific. We propose to study the impact of El-Nino Modoki events on the formation of tropical cyclones over north Indian Ocean (NIO). Our present study suggests that the cyclogenesis over the NIO is a complex phenomenon, as it is influenced by several coupled ocean atmospheric phenomena such as El-Nino, El-Nino Modki, IOD and Madden–Julian oscillation
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