HOLOCENE ENVIRONMENT RECONSTRUCTION IN EASTERN CHINA
Seminars
Semester 2
Reconstructing past hydroclimatic changes and related circulation dynamics has become a key topic in predicting future climate change. In Eastern China, some evidences show a north–south dipole pattern dominated hydroclimate during the Early–Middle Holocene, while a distinct meridional tripole pattern (wet in northeastern and southeastern China, dry in central eastern China) prevailed in the Middle–Late Holocene. This tripole pattern represents a spatial response of regional hydrology to long‑term changes in the East Asian Summer Monsoon(EASM). It also reflects the combined influence of monsoon circulation and mid‑latitude westerlies on hydroclimatic heterogeneity in eastern Asia. However, limited high-resolution records have led to insufficient reliability in verifying these dipole or tripole spatial patterns. In the future, we will collect new sediment records from key regions, use alkenone-based SST reconstructions to trace coastal upwelling and monsoon intensity, and combine pollen and other proxy evidence to verify the hydroclimatic spatial pattern across eastern Asia and explore the potential mechanisms underlying this pattern.
For additional information, please contact Mr. Zhenhan DU, zhenhandu@connect.hku.hk.