简介：Thehumificationdegreeofpeatisasignificantclimaticproxyforpaleoclimatechange.Usingthealkali-extractionmethod,atimeseriesofabsorbancevaluesoftheHanipeatland,NortheastChina,wasdetermined,whichisusedasanindicatorforthehumificationdegreeofpeat.Combinedwith14Cdatingdataofpeatcellulose,andcomparedwithδ18Oandδ13CtimeseriesofthecelluloseintheHanipeatland,theevidencefortheexistenceof14kapaleoclimatewasprovided.Higherhumificationdegreeshintawarmer-wetterclimate,andviceversa.ItalsoreconstructsthefourstagesofHoloceneclimateevolutioninthisregion:11.5–9.8calkaB.P.,warmandwetperiod;9.8–9.0calkaB.P.,coldanddryperiod;9.0–4.8calkaB.P.,warmandwetperiod;and4.8–0calkaB.P.,warm-wetanddry-coldalternationperiod.Meanwhile,itisrevealedthattheabruptclimateshiftssignalssuchasthe'8.2ka'eventandthe'4.2ka'event.ResultsshowedthattheHanipeathumificationdegreeisofsensitiveresponsetopaleoclimatechange.Therefore,itisafeasiblemethodtoanalyzetherelationshipbetweenpaleoclimatechangeandpeathumificationdegree.

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