 El Niño oo sidoo kale loo yaqaanno Southern Oscillation ayaa ah dhacdo dabiici ah oo sababta in heer kulka sagxadda hoose ee badweynta Pacific uuna si qeyrul caadi ah marna kor ugu kaco marna hoos ugu dhaco, taasoo saameyn ku yeelata hannaanka cimilada ee guud ahaan dunida. 