Geomagnetic Variations and Climate Evolution since ～9cal. Kyr as Recorded by Maar Lake's Sediments

A paleomagnetic study,supported by rock magnetic data,indicates that the lake sediments document a reliable paleosecular variation(PSV) record since~9000 cal.Based on susceptibility correlation,a composite sediment profile has been compiled from the ~16m long core and the ~8m deep well Maar lake,a crater basin located on Hainan Island,Southern China.Fine and homogeneous silty clay corroborates with a stable,continuous and undisturbed deposition,which recorded reliable Geomagnetic paleosecular variations and climate change information.Therefore,we conduct a research of relations between PSV and climate changes from a completely initiative perspective via Maar lake sediments and then compare and study their similarities and differences to explore their potential relations.