Chịkọta isiokwu ahụ:  N'ikpeazụ, ụwa nọ n'ihe ize ndụ nke El Niño a nọworo na-atụ anya ya eri ogologo oge bụ́ nke pụrụ ịgbanwe ọnọdụ ihu igwe zuru ụwa ọnụ - ma ihe omume ahụ esighị ike otú e si tụọ anya ya. Ndị ọkà mmụta sayensị ekwupụtawo na okpomọkụ nke mmiri dị n'elu oké osimiri adịwo ọkụ karịa nkezi n'ebe ọdịda anyanwụ na n'etiti Oké Osimiri Pacific, ha amalitewokwa ịgbanwe otú ifufe si efe. Ụlọọrụ US National Oceanic and Atmospheric Administration na-ebu amụma ugbu a na enwere ohere dị pasent 50 ruo 60 na El Niño ga-aga n'ihu n'oge okpomọkụ a. Ụlọ ọrụ US National Oceanic and Atmospheric Administration achọpụtala okpomọkụ dị elu karịa nkezi okpomọkụ nke mmiri gburugburu equator nke Oke Osimiri Pacific (nke egosiri n'elu) nke na-egosi ọbịbịa nke El Niño. Otú ọ dị, ha na-ekwu na ọnọdụ El Niño dị ugbu a 'dị nnọọ ala' ma na-abịa n'oge n'afọ mgbe mmetụta El Niño na-enwe n'ọnọdụ ihu igwe na-adịkarị ala. Nke a pụtara na ọ bụ ezie na ọnọdụ El Niño na-emekarị ka ihu igwe dị mmiri mmiri karị n'ebe ugwu ụwa n'oge okpomọkụ, o yighị ka ọ ga-eme ka mmiri zoo nke ukwuu karịa ka o mere n'oge opupu ihe ubi a. Ihe na-akpata El Niño bụ mgbanwe a na-enwe n'otú mmiri na-ekpo ọkụ si ekesa n'Oké Osimiri Pacific n'akụkụ ebe ụwa na-agakọ. Ikuku na-esikarị n'ebe ọwụwa anyanwụ efega n'ebe ọdịda anyanwụ, n'ihi na ụwa na-agba gburugburu, na-eme ka mmiri kpokọta n'akụkụ ebe ọdịda anyanwụ nke Oké Osimiri Pacific. Nke a na-adọta mmiri oyi site n'oké osimiri miri emi nke dị n'ebe ọwụwa anyanwụ Pacific. Otú ọ dị, n'oge El Niño, ifufe ndị na-ebugharị mmiri na-ebelata ma mee ka mmiri na-ekpo ọkụ laghachi azụ n'ebe ọwụwa anyanwụ. Nke a na-eme ka ebe ọwụwa anyanwụ Pacific na-ekpo ọkụ. Ma ebe ọ bụ na e jikọtara okpomọkụ nke oké osimiri na ebili mmiri nke ifufe, nke a na-eme ka ifufe na-adịwanye ike karị, ya mere oké osimiri na-ekpo ọkụ karị, nke pụtara na El Niño na-eto. Mgbanwe a na-agbanwe n'ikuku na n'oké osimiri ndị dị gburugburu kọntinent ahụ pụrụ inwe mmetụta dị ukwuu n'ọnọdụ ihu igwe gburugburu ụwa site n'ime ka e nwee nrụgide na-adịghị mma n'ikuku. Ụlọ ọrụ NOAA kwuru na o yighị ka ihe a ga-eme n'oge opupu ihe ubi a ọ̀ ga-eme ka mmiri zoo nke ga-eme ka oké ọkọchị a na-enwe kemgbe afọ atọ kwụsị...
US National Oceanic and Atmospheric Administration na-ekwupụta na mmiri dị ọkụ karịa nkezi na Pacific Ocean na-egosi ọbịbịa nke ọnọdụ El Niño. Ha na- ekwu na ọ ga- abụ na El Niño ga- adịgide n" oge okpomọkụ a ruo pasent 50 ruo 60. Ma, El Niño nke afọ a esichaghị ike ka nke ndị nke gara aga. Ụfọdụ ndị ọkà mmụta ihu igwe na - adọ aka ná ntị na El Niño pụrụ ijikọta ya na afọ iri ọzọ nke okpomọkụ oké osimiri iji mepụta okpomọkụ zuru ụwa ọnụ kasị elu n' afọ a. Ndị ọkachamara tụrụ anya na El Niño ga-ebido n'afọ gara aga mana o meghị.