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

全新世中晚期海洋强迫、气候变化与西格陵兰冰盖之间的相互作用

基本信息

批准号：
80094473
负责人：
Dr. Matthias Moros
金额：
--
依托单位：
Leibniz-Institut für Ostseeforschung Warnemünde (IOW)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2009
资助国家：
德国
起止时间：
2008-12-31 至 2012-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/80094473?language=en
关键词：
Interaction between oceanic forcing climate

项目摘要

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.

2007 年 R/V“Maria S. Merian”MSM05/3 巡航期间采集的高分辨率沉积岩芯将用于研究迪斯科布格特地区（西格陵兰）全新世中晚期的气候变化。该区域是测试大气与海洋温度对冰流行为影响的关键区域。海洋强迫可能是预测冰冻圈变化的模型中的一个重要因素，这些变化对未来海平面上升有影响。为了研究海洋强迫（西格陵兰海流）对冰流行为（雅各布港）以及全新世中晚期气候发展的作用，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）反映海洋信号的深层（地下）水特性的变化，以及（iii）地表变化反映海洋或融水信号的水条件取决于研究地点。分析将集中于涵盖仪器和历史时期的沉积物，但将延伸至过去 8000 年。海洋数据将补充该领域正在进行的陆地档案和考古证据研究的结果，以提高我们对环境变化对人类文化影响的理解。该项目是对西格陵兰正在进行/即将开展的与国际极地年相关的国际活动的补充研究。