Pedzisa mutsara unotevera: PMM variability is not constant. Zvose zviri zviviri mamiriro ekunze epakati - kunyanya kusimba kwekushanduka kwekupisa kwepasi pegungwa kunokonzerwa nekuchinja kwemhepo uye latitude yeITCZ - uye dutu riri muextratropics rinokanganisa kushanduka kwayo. ITCZ inoganhurira kusvika kwePMM kumaodzanyemba, uye kuchinjika kwenzvimbo yepakati yeITCZ nekuda kwekuchinja kwemamiriro ekunze kunogona kukanganisa kuratidzwa kwePMM. Kuenzanisa kwakaitwa naSanchez "et al. " (2019) kwakawana kuwedzerwa kwePMM kusiyanisa zvese mukupindura kuputika kwemakomo, senge
1257 Samalas kuputika uye mukupindura kumagasi anokonzera kupisa. Kuderera kwebasa rePMM mukati meHolocene yepakati kunogona kutsanangura kushomeka kweENSO panguva iyoyo; kuderera kwakadaro kungave kwakakonzerwa nekumanikidza kwedenderedzwa. Bramante "et al. " (2020) vakawana musiyano wakanaka wePMM panguva yeMedieval Climate Anomaly uye isina kunaka PMM panguva yeLittle Ice Age uye vakaishandisa kutsanangura shanduko mu typhoon chiitiko paJaluit muMarshall Islands uye muSouth China Sea.