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通过藏南沉错钻孔化石硅藻组合研究,应用青藏高原硅藻-湖水电导率转换函数,对沉错最近300年来湖泊古盐度进行了定量恢复.推导的电导率变化与近代湖泊水位变化记录有明显的负相关关系,表明沉错湖水盐度可以反映大气有效湿度的变化.古盐度的重建揭示了几次重要水文事件:小冰期最后一次冷期(约1845～1885AD),湖水明显淡化,反映了冷湿气候组合特点;20世纪60年代以来,湖水盐度呈急剧增高趋势,也是近300年来盐度最高、增加幅度最大时期,湖水的成化反映的有效湿度降低与近几十年来温度的不断上升而导致的蒸发量的增加有关.
Based on the study on diatom assemblage of fossil-bearing foraminifera in South Tibet and the application of diatom-lake conductivity transfer function in Qinghai-Tibet Plateau, the ancient salinity of lakes was recovered quantitatively in the past 300 years. The changes of conductivity and the changes of lakes water level Significant negative correlations were recorded, indicating that the salinity of the submerged lake can reflect the changes in the effective atmospheric humidity. Reconstruction of the paleo-salinity reveals several important hydrological events: the last cold period of the Little Ice Age (about 1845-1885AD) Desalination, reflecting the combination of cold and wet climate characteristics; since the 1960s, the salinity of the lake showed a sharp increase trend, but also the salinity of the past 300 years, the largest increase in the period, the effective reflection of the lake water to reduce the effective humidity and the last few decades The rising temperature over the years has resulted in an increase in evaporation.