Sii qor faahfaahinta faqradan - isbedelka PMM ma ahan mid joogto ah. Labada xaaladda cimilada celcelis ahaan - gaar ahaan xoogga kala duwanaanshaha qulqulka kuleylka dusha sare ee badda ee ay sababaan isbeddelada dabaysha iyo latitude ee ITCZ - iyo duufaanta ku jirta meelaha ka baxsan kulaylka waxay saameyn ku yeeshaan isbeddelada. ITCZ waxay xaddideysaa baaxadda PMM ee koonfurta, iyo isbeddelada ku jira booska celceliska ITCZ ee isbeddelada cimilada awgood ayaa sidaas saameyn ku yeelan kara muujinta PMM. Tijaabooyinka ay sameeyeen Sanchez "et al. " (2019) waxay heleen isbeddelka PMM oo kordhay labadaba ka jawaab celinta duufaanada, sida qaraxii Samalas ee 1257
Gaasaska lagu sii daayo. Hoos u dhaca waxqabadka PMM inta lagu gudajiray bartamihii Holocene wuxuu sharxi karaa isbeddelka ENSO ee daciifka ah muddadaas; hoos u dhaca noocan oo kale ah waxaa laga yaabaa inuu sabab u yahay ku qasbidda orbital. Bramante "et al. " (2020) waxay heleen kala duwanaansho wanaagsan oo PMM ah inta lagu gudajiray Cilladaha Cimilada ee Dhexe iyo PMM diidmo ah inta lagu gudajiray Xilligii Barafka Yar waxayna u adeegsadeen inay sharraxaan isbeddelada dhaqdhaqaaqa duufaanka ee Jaluit ee Jasiiradaha Marshall iyo Koonfurta Badda Shiinaha.