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

树木年轮和冰川波动导致的全新世晚期季风变化和气候变化

• 批准号: 180323682
• 负责人: Professor Dr. Achim Bräuning
• 金额: --
• 依托单位: Lehrstuhl für Physische Geographie und Geoökologie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/180323682?language=en
• 关键词: Monsoonal; variations; climate; change; during

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.

我们将应用包括地貌学和树木年代学数据在内的多代理分析方法来重建西藏东南部全新世晚期（过去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反应快速而敏感。应结合冰川沉积物的地貌和沉积学数据来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进展的年代，并通过使用不同的木材参数（如年轮宽度、最大晚材密度以及稳定 δ13C 和 δ18O 同位素含量）重建不同的季节性气候要素。冰川和树木年轮数据将用于重建重要的全新世晚期气候事件（如小冰河期和中世纪温暖期）以前的湿度和温度条件。温度敏感和湿度敏感的古气候代理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作用。

项目成果

Reconstructing glacier retreat since the Little Ice Age in SE Tibet by glacier mapping and equilibrium line altitude calculation

• DOI: 10.1016/j.geomorph.2014.03.018
• 发表时间: 2014-06
• 期刊: Geomorphology
• 影响因子: 3.9
• 作者: D. Loibl;F. Lehmkuhl;Jussi Grießinger

Ages of major Little Ice Age glacier fluctuations on the southeast Tibetan Plateau derived from tree-ring-based moraine dating

• DOI: 10.1016/j.palaeo.2015.01.002
• 发表时间: 2015-03
• 期刊: Palaeogeography, Palaeoclimatology, Palaeoecology
• 作者: P. Hochreuther;D. Loibl;Jakob Wernicke;Haifeng Zhu;Jussi Grießinger;A. Bräuning