摘要:干旱区内流河流域水循环是干旱区古气候研究的热点,前人做了大量研究,但大部分研究主要利用气候代用指标重建古气候与古环境演化规律,长时间尺度模拟与重建对比研究较少。以石羊河流域为研究对象,在石羊河流域古环境记录基础上结合古气候模拟、全新世古季风模拟、湖泊能量与水量平衡模拟,古降水量和古径流量定量重建等方法,系统地模拟重建全新世时期石羊河流域水循环。可以看出模拟结果与重建结果具有很好的一致性,均指示中全新世是全新世“气候适宜期”。为干旱区流域性气候变化重建与模拟研究提供了新的视角。
Hydrological cycles of inland rivers are highlighted in paleoclimate studies of arid regions. A great number of studies have been published in this regard, but most of the studies have mainly used climate proxies to reconstruct the evolution of paleoclimate and paleoenvironment, and there have been little long-term simulation and reconstruction experiments. Concerning this issue, we systematically carried out the long-term reconstruction and simulation experiments of hydrological cycle based on paleoenvironment records of the Shiyang River drainage basin with a lot of methods such as paleoelimate simulations, the Holocene monsoon simulations, lake water and energy balance model and quantitative reconstruction of paleo-precipitation and paleo-runoff. The results showed that the simulation results had a good consistency with the reconstruction results, indicating that mid-Holocene was "climatic optimum" in the Holocene. This research provided a new perspective for reconstruction and simulation studies of climate change in arid areas.