Sampling Patagonia dust onboard FS Meteor on her transit from Walvis Bay (Namibia) to Talcahuano (Chile), Fall 2008

2008 年秋季，在 FS Meteor 从鲸湾港（纳米比亚）飞往塔尔卡瓦诺（智利）的途中，在 FS Meteor 上采样巴塔哥尼亚灰尘

• 批准号: 89085480
• 负责人: Professor Dr. Dierk Hebbeln
• 金额: --
• 依托单位: Royal Netherlands Institute for Sea Research (NIOZ)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/89085480?language=en
• 关键词: Sampling; Patagonia; dust; onboard; FS

Patagonian dust, which is nowadays blown from Argentina into the South Atlantic Ocean, isthought to have played a major role in the development of global glacial climate conditionsthrough fuelling of primary production in the High-Nutrient-Low-Chlorophyll waters of theSouthern Ocean2. In addition, there is an ongoing debate on the origin of wind-blown dustfound in Antarctic ice cores, and there are strong indications that South America was a majorsource of dust during glacial times3'4'5, although recent studies have demonstrated theimportance of Australia as a potential source of dust as well6. During glacial timesPatagonian dust was not only blown over the Atlantic Ocean towards the South Pole, butalso over the South American continent, and deposited in vast loess deposits downwind ofthe Argentinean pampas7. At present, the Patagonian dust plume is considered the secondmost important supplier of dust to the ocean on the southern hemisphere8, potentially stillacting as fertiliser for the South Atlantic. However, hardly any studies have been carried outon the chemical and mineralogical composition or dispersal patterns of this material.On its transit cruise from Walvis Bay (Namibia) to Talcahuano (Chile), RV Meteor will sailright through the Patagonian dust plume, which blows from Argentina into the AtlanticOcean. This is a unique opportunity to study this largely unknown source of dust, and byanalysing the dust's physical, (bio-) geochemical, and mineralogical composition, contributeto the discussion on the provenance of Antarctic dust.

如今从阿根廷吹入南大西洋的巴塔哥尼亚沙尘被认为通过为南大洋高营养低叶绿素水域的初级生产提供燃料，在全球冰川气候条件的发展中发挥了重要作用2。此外，关于南极冰芯中发现的风吹尘埃的起源一直存在争论，并且有强烈的迹象表明，南美洲是冰川期3'4'5尘埃的主要来源，尽管最近的研究表明澳大利亚的重要性也是潜在的灰尘来源6。在冰河时期，巴塔哥尼亚的沙尘不仅被吹过大西洋吹向南极，而且还吹过南美大陆，并沉积在阿根廷潘帕斯草原顺风的巨大黄土沉积物中7。目前，巴塔哥尼亚尘羽被认为是南半球海洋第二重要的尘埃来源8，可能仍然是南大西洋的肥料。然而，几乎没有对这种材料的化学和矿物成分或扩散模式进行过任何研究。 在从鲸湾港（纳米比亚）到塔尔卡瓦诺（智利）的过境巡航中，RV Meteor 将直接穿过巴塔哥尼亚的尘埃羽流，这些尘埃羽流从阿根廷流入大西洋。这是研究这种很大程度上未知的尘埃来源的独特机会，并通过分析尘埃的物理、（生物）地球化学和矿物学成分，为有关南极尘埃来源的讨论做出贡献。