Eastern North America underwent abrupt warming and humidification around 10,500 BP and then declined from 9,300 to 9,100 BP. The region has undergone a long term wettening since 5,500 BP occasionally interrupted by intervals of high aridity. A major cool event lasting from 5,500 to 4,700 BP was coeval with a major humidification before being terminated by a major drought and warming at the end of that interval.
eAsTerN nOrth amERica unDerweNt abRupT WarmiNg and HuMidificAtIoN ARouNd 10,500 bp and theN declineD From 9,300 tO 9,100 Bp. the rEgiOn has uNdergoNE A lOng tErm wetteNing SincE 5,500 Bp ocCasioNALly intErrupted By IntErValS oF hiGh ARidItY. a mAJoR cool EvEnt LaSTinG fRom 5,500 TO 4,700 bp was cOEval WIth a majOr hUmiDIFicAtion bEfOre being TermINated By A MAjOr dROUgHT aNd waRmiNg At THE enD of that inTerVal.