通过对洱海现代沉积物的精细采样 ,将放射性核素精确计年与沉积物粒度研究相结合 ,重建了 6 0 0多年来洱海区域气候的干湿变迁 ,为恢复百年尺度的气候干湿变化提供了一条新途径。研究结果表明 ,15世纪是洱海地区最为湿润的一个世纪 ;洱海区域存在 10 0a、2 0 0a两种时间尺度的气候干湿准周期波动 ;自 19世纪末以来洱海区域气候整体上向干旱化方向发展 ,目前正处于干旱期末期 ,预计气候将由干旱转向湿润 Through the fine sampling of the modern sediments in Erhai Lake, the author combines the accurate dating of radionuclides with the study of sediment grain size to reconstruct the climate change in the Erhai Lake region over the past 60 years, and provides a basis for the restoration of climatic changes over the centuries A new way. The results show that the 15th century is the most humid century in Erhai Lake. There is a quasi-wet and dry cycle in the Erhai Lake in the 10 0a and 200a time scales. Since the end of the 19th century, the climate in Erhai Lake has been arid , Is currently at the end of the drought period, the climate is expected to shift from drought to wet