Monsoonal variations and climate change during the late Holocene derived from tree rings and glacier fluctuations

我们将应用多重代理分析方法，包括地貌和年代学数据，重建西藏东南部晚全新世(最近1500年)的冰川和气候历史。西藏东南部的季风温带冰川对气候变化反应迅速且敏感。冰川沉积物的地貌和沉积学数据应结合起来，以重建冰川波动和平衡线高度变化。从冰川附近地点新收集的树木年轮材料将有助于确定小冰期冰川前进的时间，并通过使用不同的木材参数，如年轮宽度、最大晚材密度和稳定的δ13C和δ18O同位素含量，重建不同的季节气候要素。冰川和树木年轮数据将被用来重建晚全新世重要的气候事件，如小冰期和中世纪暖期的以前的水分和温度条件。温度敏感和湿度敏感的古气候指标的结合将使我们能够理清温度和湿度变化对青藏高原东南部季风温带冰川行为的影响。

We will apply a multiproxy analysis approach including geomorphological and dendrochronological data to reconstruct glacier and climate history in southeastern Tibet during the late Holocene (last 1500 years). Monsoonal temperate glaciers in southeastern Tibet react fast and sensitive on climate changes. Geomorphological and sedimentological data from glacier sediments shall be combined to reconstruct glacier fluctuations and equilibrium-line altitude variations. Newly collected tree-ring material from glacier-near sites will help to date Little Ice Age glacier advances and to reconstruct different seasonal climatic elements by using different wood parameters like ring width, maximum latewood density and the content of stable δ13C and δ18O isotopes. Glacier and tree-ring data will be used to reconstruct former moisture and temperature conditions during important late Holocene-climate episodes like the Little Ice Age and the Medieval Warm Period. The combination of temperature-sensitive and moisture-sensitive palaeoclimate proxies will enable us to disentangle the role of temperature and humidity changes for the behaviour of monsoonal temperate glaciers on the southeastern Tibetan plateau.