Circulation Patterns Linked to the Positive Sub-Tropical Indian Ocean Dipole

Abstract The positive phase of the subtropical Indian Ocean dipole (SIOD) is one climatic modes in southern that influences austral summer inter-annual rainfall variability parts Africa. This paper examines rain-bearing circulation types (CTs) Africa south equator are related to SIOD and dynamics through which specific regions can be influenced by this relationship. Four CTs were obtained. Among four CTs, CT featured (i) enhanced cyclonic activity southwest Ocean; (ii) widespread anomaly (iii) low-level convergence moisture fluxes from tropical South Atlantic Ocean, over south-central landmass Africa, was found mode. relationship also implies expected increase amplitude frequency occurrence aforementioned CT. linkage between homogeneous anomalies showed it principal where already known significantly influence its variability. Hence, large-scale patterns atmospheric associated with CT, spatial distribution intensity preferred convergence.