最近15万年中原地区冬、夏季风强度及干湿气候变化

Through the study of the loess strata with high sedimentary rate during the last 150,000 years in the central area of China, the strata sequence and its time scale were set up according to the main high-resolution proxy records of susceptibility and grain size data in this program. Furthermore, the annual monsoon amplitude sequence reflecting the correlations between winter and summer monsoon intensity were established on the basis of the Distance Average (DA) of susceptibility flux, the substitute index of winter monsoon intensity, and the DA of coarse grain size content, the substitute index of summer monsoon intensity, that could impersonally measure the winter and summer monsoon intensity variations and the dry and humid climatic changes. The quantificational correlations between summer and winter monsoon intensity reflected by annual monsoon amplitude were the fixed proxy of monsoon variations of dry and humid. The Heinrich Events recorded by loess during the last glaciation showed some difference: existing more cold events. Investigation suggested that the monsoon climate recorded by loess exist various assembled characters of cold-dry, cold-humid, warmth-dry and warmth-humid. Revealing the evolutive stages of winter and summer monsoon, the existent models of abrupt events and the processes and characters of climatic dry and humid changes provide significative basis of globe climatic comparison and regional environmental forecast.

通过对中原地区高分辨率黄土地层古季风记录的深入研究，分别确定磁化率通量距平为夏季风强度、粗颗粒含量距平为冬季风强度、反映科、夏季风强度组合关系的季风年变幅为气候干湿度的定量代用指标，建立最近15万年各自的变化曲线，着重在亚轨道尺度上据以分析东亚季风气候的干湿变化过程和区域环境效应，并探讨其演变机制，服务于对未来的预测。.