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Atmospheric Dust and Irradiation effects on Ocean Surface processes - Biogeochemistry in the Atlantic Ocean (ADIOS-BAO)

大气尘埃和辐射对海洋表面过程的影响 - 大西洋生物地球化学 (ADIOS-BAO)

基本信息

批准号：
166158443
负责人：
Dr. Peter Leslie Croot
金额：
--
依托单位：
Department of Earth and Ocean Sciences
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2012-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/166158443?language=en
关键词：
Atmospheric Dust Irradiation effects Ocean

项目摘要

Funding is requested for participation in the Polarstern expedition ANTXXVI-4 from Punta Arenas to Bremerhaven scheduled for Apr-May 2010. This cruise will provide a further opportunity to continue ongoing studies into the aerosol deposition of trace elements to the open ocean and its effect on ocean biogeochemical cycles. In cooperation with national and intemational partners we propose to assess the combined impacts of aerosol deposition and irradiation on the near surface biogeochemistries of P, N, Fe, Al and Ti. The proposed transect crosses regions potentially influenced by dust sources from Patagonia and the Sahara, providing the opportunity to compare the oceanic response to these different aerosol sources. Our work will focus on the simultaneous daily collection of atmospheric aerosols and surface seawater samples, along the cmise track, for analysis at sea and in the laboratory in Kiel. At each daily station, shipboard measurements will be made of coloured dissolved organic matter (CDOM), phosphate, Fe, Al, Ti and the transient redox species Fe(ll) and H2O2 in near surface waters to examine the influence of dust supply and irradiation along the transect. Specific at sea experiments will focus on the instantaneous dissolution ofthe daily sampled aerosols with freshly collected seawater. Additional longer term experiments will utilize archived dust sources from the Sahara and Patagonia with clean seawater collected from different regions during the voyage to assess possible regional differences in the dissolution processes.

请求为参加定于2010年4月至5月从蓬塔阿雷纳斯到不来梅港的北极星号ANTXXVI-4考察提供资金。这次航行将提供进一步的机会，继续进行正在进行的研究，探讨微量元素在公海的气溶胶沉积及其对海洋生物地球化学循环的影响。在与国家和国际合作伙伴的合作中，我们建议评估气溶胶沉积和辐射对近地表P，N，Fe，Al和Ti的地球化学的综合影响。拟议的样带穿越可能受巴塔哥尼亚和撒哈拉沙尘源影响的区域，提供了比较海洋对这些不同气溶胶源的响应的机会。我们的工作将集中在每天同时收集大气气溶胶和表层海水样品，沿着cebu轨道，用于海上和基尔的实验室分析。在每个日常观测站，将对近地表沃茨中的有色溶解有机物（CDOM）、磷酸盐、Fe、Al、Ti和瞬时氧化还原物种Fe（II）和H2 O2进行船上测量，以检查粉尘供应和沿着断面辐照的影响。具体的海上实验将侧重于每日采样的气溶胶与新鲜收集的海水的瞬时溶解。其他长期实验将利用来自撒哈拉和巴塔哥尼亚的存档灰尘源以及航行期间从不同地区收集的清洁海水，以评估溶解过程中可能存在的区域差异。