The Medieval Warm Period and Little Ice Age in the Daihai area, North China

Rb/Sr ratio, CaCO₃ content, organic carbon (C_org) concentration, magnetic susceptibility and clay mineralogy of 4. 0 m sediments samples recovered from Daihai Lake, northern China, are presented in the paper. Weathering and paleolimatic change history during the last 2300 years is reconstructed in terms of the variations of Rb/Sr ratios in the sediment sequence, including the Little Ice Age and Medieval Warm Period. Our results suggest that the evolution processes of weathering and paleoclimate can be rebuilt in terms of the variations of Rb/Sr ratios in the lake sediment sequence, in combination with magnetic susceptibility, C_org , CaCO₃ contents and clay mineralogy.