Seminar

Understanding the natural climate variability of the past millennium helps deciphering the monsoon-derived moisture change under recent warming period. Several past decades of research has intensively focused on the East Asian monsoon region, but rainfall pattern in its marginal area is still poorly investigated to date. In this study, we reconstructed moisture and temperature change over the past 1,100 years at the Lake Daihai. Alkenone proxies %C_37:4 and U^K’₃₇ indicated warm-wet/cold-dry mode during the Medieval Warm Period (MWP, 800-1450 AD) and Little Ice Age (LIA, 1450-1850 AD) respectively, two typical climate intervals identified within the past millennium. Our results showed that the MWP, although characterized by fluctuations, appears to be remarkably wet as the Current Warm period (CWP, since 1850 AD). A strong linkage between solar irradiance and moisture change at the Lake Daihai was also observed, especially during the MWP.