干旱区生态环境知识资源中心

Bottom sediments in Siling-co in central Tibet reveal that late in the last glacial period the area around the lake was arid, water inflow was small and the level of the lake was low. In the early postglacial period it became markedly humid and the water level rose rapidly because of large inflows from surrounding basins. The climate was humid and the level of the lake high during the hypsithermal. At about 2,000-4,000 yr B.P. it again became arid within a short time and the water level dropped sharply. After this short arid interval and low water level, it again became humid and the water inflow increased sharply. Large inflows continued for a time after which it again began to get arid.