This syndrome was possibly accelerated by an apparent decline in rainfall reliability beginning 730–760, with the presumed result that an abbreviated modern growing season was reestablished during the 9th century.
Acest sindrom a fost, eventual, accelerat printr-un declin evident în precipitații fiabilitate începutul 730-760, cu prezumată a rezultat că un abreviat moderne de vegetație a fost restabilit în al 9-lea.