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

我们将采用多代理分析方法，包括地貌和树木年代学数据，重建西藏东南部晚全新世（1500年）的冰川和气候历史。西藏东南部季风温带冰川对气候变化的反应迅速而敏感。冰川沉积物的地貌和沉积学数据应结合起来重建冰川波动和平衡线高度变化。通过使用不同的木材参数，如年轮宽度、最大晚期木材密度和稳定的δ13C和δ18O同位素含量，从冰川附近遗址收集的新树木年轮材料将有助于确定小冰期冰川进展的年代，并重建不同的季节气候要素。冰川和树木年轮数据将用于重建全新世晚期重要气候时期（如小冰河期和中世纪温暖期）以前的湿度和温度条件。温度敏感古气候指标和湿度敏感古气候指标的结合将使我们能够解开青藏高原东南部季风温带冰川行为中温度和湿度变化的作用。

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.