Changes in the impact of Tropical basin interactions on Cape Vert tropical cyclogenesis

Adama Badiane,a,b M. Belén Rodríguez-Fonseca,b,c, Teresa Losadab, Abdou Lahat Dieng,a Cheikh Modou Noreyni Fall,a Amadou Thierno Gaye,a Saidou Moustapha Sall,a
a Laboratoire de Physique de l’Atmosphère et de l’Océan Siméon Fongang (LPAOSF), École Supérieure Polytechnique (ESP), Univ. Cheikh Anta Diop, Dakar, Senegal
b Departamento de Física de la Tierra y Astrofísica, Universidad Complutense, Madrid, Spain c IGEO, Instituto de Geociencias (CSIC, UCM), Madrid, Spain
Corresponding author: Adama Badiane, dibadama86@gmail.com
El Niño-Southern Oscillation (ENSO) events influence cyclones in the northern tropical Atlantic, but the role of the equatorial Atlantic has received less attention. This study explores how tropical ocean basins influence cyclones off Senegal and examines fluctuations over several decades. By comparing two periods (1979-1998 and 2003- 2022), we found that the impact of the equatorial Atlantic and Pacific oceans on cyclones was more marked in the first period. This inter-basin pattern is associated with 42% of the covariability between local pressures and surface temperatures. These results indicate that ocean temperature variability influences cyclone activity, with implications for cyclone predictability in the context of global warming.