Late Holocene climate and environmental changes in the Eurasian Arctic - evidence from glacier and ground ice (Eurasian Arctic Ice 4k)

北极作为全球气候系统的关键区域，受持续气候变化的影响比其他大多数地区都要大。由于欧亚北极的气象时间序列很短，气候档案对于评估前工业化晚期全新世的自然气候变异性及其原因具有特别重要的意义。拟议的项目旨在以对Akademii Nauk冰芯(Severnaya Zemlya)和来自非冰川的西伯利亚北极的冰楔的研究为基础，主要通过稳定水同位素的手段，重建全新世晚期的气候和环境变化。虽然冰芯被认为是最好的气候档案之一，但将冰楔作为中等分辨率档案的分析是创新的。一种新的测年方法(使用放射性核素10Be)将扩展稳健的冰芯年龄模型。考虑到冰盖的增长，这使得能够以高分辨率跟踪欧亚西部北极的气候和环境动态。对沿东西走向不同研究地点的冰楔的分析将产生新的区域冬季气候记录。冰芯和冰楔记录的独特组合将对欧亚北极气候在全新世晚期的季节、时间和空间动态、其原因以及大西洋和太平洋不同影响之间的水分产生和传输模式提供新的见解。

The Arctic as key region for the global climate system is more affected by ongoing climate change than most other regions. As meteorological time series from the Eurasian Arctic are short, climate archives are of particular importance for the assessment of the natural climate variability and its causes in the preindustrial Late Holocene. The proposed project aims at reconstructing Late Holocene climate and environmental changes based on the study of the Akademii Nauk ice core (Severnaya Zemlya) and ice wedges from the non-glaciated Siberian Arctic, mainly by means of stable-water isotopes. Whereas ice cores are known as one of the best climate archives, the analysis of ice wedges as mid-resolution archives is innovative. A new dating approach (using the radionuclide 10Be) will extend the robust ice-core age model. Taking ice-cap growth into account, this allows tracking the climate and environmental dynamics of the Western Eurasian Arctic in high resolution. The analysis of ice wedges at different study sites along a west-east transect will result in new regional winter climate records. The unique combination of ice-core and ice-wedge records will provide new insights into the seasonal, temporal and spatial dynamics of the Eurasian Arctic climate in the Late Holocene, into their causes and into the moisture generation and transport patterns between the varying impacts of the Atlantic and Pacific Oceans.