利用柴达木盆地苏干湖湖水和介形虫活体开展不同温度条件下介形虫培养实验，结合苏干湖近几十年来表层沉积物介形虫壳体碳酸盐clumped同位素Δ47与温度记录的对比研究，揭示介形虫Δ47对温度变化的响应关系，研究建立湖泊介形虫壳体碳酸盐Δ47与温度的转换函数。在此基础上通过对沉积物柱芯不同沉积时段介形虫Δ47值的研究，定量/半定量恢复湖水古温度变化，结合介形虫氧同位素研究重建湖水氧同位素组成变化历史，推断湖区干湿变化，揭示该地区近2000a来主要气候变化事件的性质、时间、幅度和速率，为区域和全球气候变化对比及驱动机制研究提供基础性资料，为合理预测未来可能出现的气候变化提供借鉴。 本研究将为定量/半定量古气候重建提供新的途径，同时将丰富和拓展clumped同位素的研究和应用。

Ostracod cultivating experiments will be carried out under different temperature conditions using the water and live ostracods from Sugan Lake in Qaidam basin。Clumped isotope Δ47 - temperature relationship for the ostracod valves in the lake will be established based on the cultivating experiments and the compare of the clumped isotope Δ47 of the ostracod valves in the surface sediments deposited in the last several decades and the meteorological temperature. On the basis of the established clumped isotope Δ47 - temperature relationship for the ostracod valves, the temperature variations during the last 2000a will be quantitatively/semi-quantitatively reconstructed through the analysis of the clumped isotope Δ47 of the ostracod valves of the sediment cores. Oxygen isotope composition of lake water will be achieved using the Craig paleotemperature equation, combined with the oxygen isotope composition of ostracod valves and the reconstructed temperature. Then the humidity variations in the lake area will be inferred from the lake water oxygen isotope composition. Accordingly, the property, time, variation amplitude and tempo of the main climate events will be revealed. This study will provide the basic data for the compare of regional and global climate change and for the driving mechanism research, and will be helpful in predicting the future climate change. This study will provide a new way for quantitative/semi-quantitative palaeoclimate reconstruction, and will extend the research and application of clumped isotope.