Neetu S. auteur aut IRD Lengaigne Matthieu auteur aut IRD Vialard Jérôme auteur aut IRD Samson G. auteur aut IRD Masson S. auteur aut IRD Krishnamohan K. S. auteur aut IRD Suresh I. auteur aut IRD text journalArticle eng text/pdf born digital access The densely populated Bay of Bengal (BoB) rim witnesses the deadliest tropical cyclones (TCs) globally, before and after the summer monsoon. Previous studies indicated that enhanced salinity and reduced thermal stratification reduce cooling under BoB TCs after the monsoon, suggesting that air-sea coupling may favor stronger TCs during that season. Using observations and simulations from a one fourth degree regional ocean-atmosphere model, we show that BoB TCs are stronger before the monsoon due to a more favorable large-scale background state (less vertical wind shear and higher sea surface temperature). Air-sea coupling however alleviates this background state influence, by reducing the number of premonsoon intense TCs, because of larger cooling and reduced upward enthalpy fluxes below TCs during that season. As the impact of air-sea interactions on BoB TCs is largest for intense TCs, it should be further investigated for Category 3 and above TCs, which are not reproduced at one fourth degree resolution. specialized tropical cyclones Bay of Bengal air-sea coupling cold wake coupled ocean-atmosphere model OCEAN INDIEN 032 020 46 4 2149-2157 2019 0094-8276 https://www.documentation.ird.fr/hor/fdi:010075506 10.1029/2018gl081132 0094-8276 [F B010075506] https://www.documentation.ird.fr/hor/fdi:010075506 https://www.documentation.ird.fr/intranet/publi/2019/04/010075506.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2019-05-13 2025-02-24 fdi:010075506 fre