Interaction between oceanic forcing, climate change and the West Greenland ice sheet during the mid- to late Holocene

在“Maria S. 2007年Merian号MSM 05/3巡航将用于研究Disko Bugt地区（西格陵兰）全新世中期至晚期的气候变化。这一地区是测试大气与海洋温度对冰流行为影响的关键区域。海洋作用力可能是预测对未来海平面上升有影响的冰冻圈变化的模型中应包括的一个重要因素。为了研究海洋作用力的作用（西格陵兰海流）对冰流行为的影响（Jacobshavn Isbrae）以及一般的全新世中期至晚期气候发展，需要使用多代理方法详细重建三个海洋学参数：（i）冰山漂移和融水输入的变化，（ii）深海反映海洋信号的（地下）水性质，以及（iii）根据所研究的地点，反映海洋或融水信号的地表水条件的变化。分析将集中在覆盖仪器和历史时期的沉积物上，但将扩展到过去8000年。海洋数据将补充正在进行的关于这一领域陆地档案和考古证据的研究结果，以提高我们对环境变化对人类文化影响的认识。该项目是对西格陵兰正在进行/即将进行的与国际极地年有关的国际活动的补充研究。

High-resolution sediment cores taken during R/V “Maria S. Merian” MSM05/3 cruise 2007 will be used to study mid- to late Holocene climate variability in the Disko Bugt area (West Greenland). This area is a key region to test atmospheric versus ocean temperature influence over ice stream behaviour. Ocean forcing might be an important element to include in models predicting changes to the cryosphere that have implications for future sea-level rise. To investigate the role of ocean forcing (West Greenland Current) on ice-stream behaviour (Jacobshavn Isbrae) as well as the general mid- to late Holocene climatic development three oceanographic parameters need to be reconstructed in detail using multi-proxy approaches: (i) variations in iceberg drift and meltwater input, (ii) changes in deep (subsurface) water properties reflecting the ocean signal, and (iii) changes in surface water conditions reflecting an ocean or meltwater signal depending on site studied. Analyses will concentrate on sediments covering the instrumental and historical periods, but will extend to the last 8.000 years. The marine data will complement results of ongoing studies on terrestrial archives and archaeological evidence in this area to improve our understanding of the influence of environmental change on human cultures. This project is a complementary study to ongoing/ forthcoming international activities in West Greenland related to the International Polar Year.