Koordinatorantrag zur METEOR-Reise 75

METEOR 旅行的协调员申请 75

• 批准号: 64714664
• 负责人: Professor Dr. Ralph Schneider
• 金额: --
• 依托单位: Institut für Geowissenschaften
• 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/64714664?language=en
• 关键词: Koordinatorantrag; zur; METEOR; Reise; 75

La Reunion hotspot setting is highly favourable to study mechanisms involved in the functioning of a deep mantle plume and in the evolution of such an oceanic volcanic system. Dismantling of volcanic edifices due to flank destabilizations and erosion is now recognized as a major component of their long-term evolution. It largely contributes to the construction of submarine slopes of such islands. However, these mechanisms remain largely unknown, hi the case of La Reunion, the aim of the proposed cruise ERODER is to better understand, and to quantify, the processes and the dynamics of the transfer of sediments and epiclastic materials on the submarine slopes of a large intraplate oceanic volcanic system, and to evaluate their importance in the present and past evolution of the volcanic edifice itself. ERODER is based on a detailed geophysical survey (swath bathymetry and backscatter data, gravity. 3.5-Khz sediment penetrator) of the upper part of the edifice and on the use of direct or indirect high resolution observation tools (e.g., side scan sonar - SAR) on precise targets of the submarine part of the island. The proposed work is multidisciplinary, interesting both sedimentary and volcano-structural aspects, in order to specify the processes of the evolution of the submarine flanks of the island and to establish the relationships with the subaerial structures and processes. M75/1B: In order to obtain detailed observations on the year to year variability of the flow in and through the Mozambique Channel an array of moorings with current meters (and one sediment trap) has been deployed at the narrowest section of the Channel for a period of at least 5 years. The first deployment was done in November 2003 and servicing of the moorings has been done in February 2005 and March 2006. The first purpose of the cruise in January 2008 is to recover and redeploy the moorings in the Mozambique Channel after the data have been retrieved and the instruments have been serviced. The second purpose is to obtain hydrographic observations and samples of the seafloor (from multi-coring) along the section where the moorings are deployed. The observational methods to be applied during the hydrographic survey will be the lowering of a CTD and rosette sampler with 101 sampler, as well as an LADCP instrument to determine the vertical velocity profile. A ship-mounted ADCP will be used to determine the surface (0-500m) velocity structure en route, while a thermo-salinograph will monitor the sea surface salinity and temperature. The research is part of the Dutch contribution to the international CLIVAR (CLImate VARiability) programme which is part of the WCRP (World Climate Research Program).

留尼汪岛热点的设置是非常有利的研究机制，参与运作的深地幔柱和这样一个海洋火山系统的演变。由于侧翼的不稳定和侵蚀而造成的火山建筑物的解体现在被认为是其长期演变的一个主要组成部分。它在很大程度上有助于这些岛屿海底斜坡的建造。然而，这些机制在很大程度上仍然是未知的。在留尼旺岛的情况下，拟议的ERODER巡航的目的是更好地了解，并量化，沉积物和epicophilic材料的转移过程和动态的一个大型板内海洋火山系统的海底斜坡，并评估其在火山建筑本身的现在和过去的演变的重要性。ERODER的依据是详细的地球物理调查（条带测深和反向散射数据、重力）。3.5-Khz沉积物穿透器）以及使用直接或间接高分辨率观测工具（例如，侧扫声纳（SAR）对该岛潜艇部分的精确目标进行定位。拟议的工作是多学科的，有趣的沉积和火山结构方面，以具体说明岛屿的海底侧翼的演变过程，并建立与陆上结构和过程的关系。M75/1B：为了详细观察莫桑比克海峡内和通过该海峡的水流的年与年之间的变化，在该海峡的最西端布置了一系列带有流速计的系泊装置（和一个沉积物收集器），为期至少5年。2003年11月进行了第一次部署，2005年2月和2006年3月进行了系泊服务。2008年1月航行的第一个目的是，在检索数据和维修仪器之后，恢复和重新部署莫桑比克海峡的系泊设备。第二个目的是获得水文观测和海底样品（从多芯取样）沿着部署系泊设备的部分。水文测量期间采用的观测方法将是下放CTD和带有101取样器的玫瑰花形取样器以及LADCP仪器，以确定垂直流速分布。将使用一个船载ADCP来确定途中的表面（0- 500米）速度结构，而一个温盐仪将监测海面盐度和温度。该研究是荷兰对国际气候变化（CLIVAR）计划的贡献的一部分，该计划是世界气候研究计划（WCRP）的一部分。