Thetotal15severedroughtsarediscoveredwiththeaidofthe'RetrievalSystemofChineseHistoricalClimateRecords'forthelast1000years.Thedroughtsareextensivetoenvelopemorethan4provincesandpersistenttocover3yrormore,andtheirseverityisequivalenttoorinexcessofthatinthe1930sinChina.Accordingtothedocumentaryrecordsandrestorationsitcanbeinferredthatmostdroughtsaremoreseverethanthoseinthelast50years.The15droughtsmayeitheroccurwarmorinacoldclimatebackground,with11ofthe15casesinthecoldphase.ThisindicatesthedifferenceinclimatecorrespondencebetweenChinaandnorthernAmerica,showingtheseverityoftheeventsinChinatobeinacoldinsteadofawarmclimatesituation.ThatislikelytorelatetothemonsoonclimateineasternAsia.