The geochemical response of sedementary archives to rapid recent glacier retreat at WAP: from source to sink

沉积档案对 WAP 最近冰川快速退缩的地球化学响应：从源头到汇

• 批准号: 131194650
• 负责人: Professor Dr. Hans-Jürgen Brumsack
• 金额: --
• 依托单位: Institut für Chemie und Biologie des Meeres (ICBM)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/131194650?language=en
• 关键词: geochemical; response; sedementary; archives; rapid

The Western Antarctic Peninsula (WAP) belongs to those regions, which are characterized by rapid regional warming and concomitant glacier retreat, affecting the coastal ecosystem by turbid meltwaters and contributing to global sealevel rise. We intend to characterize the particulate (SPM) and dissolved load of glacial meltwaters draining into Potter Cove and Maxwell Bay on King George Island by inorganic geochemical methods (major and minor elements). The extent of meltwater drainage and SPM input will be investigated by analyzing surface sediments from Potter Cove and adjacent areas. Sediment cores from different locations will be used to assess whether the increase in SPM may be quantified by determining sediment accumulation rates with 210Pb. Sediment cores from Potter Cove and Maxwell Bay serve as archives for the climatic and paleoenvironmental development of this area during the Holocene - the last century in particular - and will be analyzed at high temporal resolution. The overarching goal of the proposed study is to assess, based on geochemical proxies, whether the effects of regional warming at WAP are reflected in the sediment geochemistry and if such episodes did occur during other intervals within the Holocene.

南极半岛西部（WAP）属于区域快速变暖和冰川退缩的区域，其特征是通过浑浊的融水影响沿海生态系统，并导致全球海平面上升。本文拟采用无机地球化学方法（主要元素和次要元素）对流入乔治国王岛波特湾和麦克斯韦湾的冰川融水的颗粒（SPM）和溶解负荷进行表征。通过分析波特湾和邻近地区的地表沉积物，将调查融水排水和SPM输入的程度。将使用不同地点的沉积物岩心来评估是否可以通过测定210Pb的沉积物积累速率来量化SPM的增加。波特湾和麦克斯韦湾的沉积物岩心作为该地区在全新世（特别是上个世纪）气候和古环境发展的档案，将以高时间分辨率进行分析。这项研究的首要目标是基于地球化学指标，评估WAP区域变暖的影响是否反映在沉积物地球化学上，以及这种事件是否确实发生在全新世的其他间隔。