An open access platform to document and retrieve composite records from ocean drilling sites - the Ocean Drilling Composite Tracker (ODCT)

用于记录和检索海洋钻探现场综合记录的开放式访问平台 - 海洋钻探综合跟踪器 (ODCT)

• 批准号: 506530658
• 负责人: Professor Dr. Heiko Pälike, Ph.D.
• 金额: --
• 依托单位: Department of Earth Sciences
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/506530658?language=en
• 关键词: open; access; platform; document; retrieve

A key concept in scientific ocean drilling in order to recover continuous multi-million year spanning successions from the sea floor is the formation of composite records. Drilling multiple holes at a given site and the subsequent assemblage of an undisturbed and complete sediment sequence allows scientist to retrieve outstanding, several hundreds of meters thick records for paleoclimate reconstructions. Fifty years of ocean drilling clearly revealed that a single drilled hole is not adequate to be able to resolve the progression of climate change needed to identify causal mechanism. The composite records from multiple drilled holes have become the backbone of paleoceanographic research to better understand Earth past climate changes. Typically during a two month-long ODP/IODP Expedition targeting to retrieve full sediment successions from the sea floor a composite is formed routinely onboard by the Stratigraphic Correlator. The quality of the composite record depends mainly on the careful correlation of prominent features in the core, which in turn depends on the quality of the data used for correlation. In addition, to evaluate, verify and improve shipboard composite records other more time consuming techniques with higher signal-to-noise-ratio help to substantially revised composite records, and sometime reveal major gaps or repeated interval in composite records. Thus, years after an expedition checks and revisions can result in an iteratively evolving composite with multiple published versions. The main goal of the planned project is to develop an open access and cross-platform software tool to document and track all of the published and future composite records of scientific ocean drilling core sites, the Ocean Drilling Composite Tracker. Scientist can use this tool to generate sample lists with sample identification as well as composite depth and vice versa for different composite versions, retrieve alternative sample locations in parallel sections that are not part of the composite record, extract data according to the composite from the drill core database, and retrieve ages for the samples or data using published age models. This tool is one step towards applying machine-aided data analysis and extraction.

为了从海底恢复连续数百万年的连续性，科学海洋钻探的一个关键概念是形成复合记录。在一个给定的地点钻多个孔，然后组合一个未受干扰的完整沉积物序列，使科学家能够检索出杰出的，数百米厚的记录，用于古气候重建。五十年的海洋钻探清楚地表明，一个单一的钻孔不足以解决气候变化的进展，需要确定因果机制。来自多个钻孔的复合记录已成为古海洋学研究的支柱，以更好地了解地球过去的气候变化。通常，在为期两个月的ODP/IODP考察期间，目标是从海底取回完整的沉积物序列，通常由地层对比器在船上形成复合物。综合记录的质量主要取决于对岩芯中的突出特征进行仔细的对比，而对比又取决于用于对比的数据的质量。此外，为了评估、验证和改进船上的复合记录，其他具有更高信噪比的更耗时的技术有助于大幅修订复合记录，有时还可以揭示复合记录中的主要空白或重复间隔。因此，在一次考察多年后，检查和修订可能会导致一个迭代发展的复合材料与多个发布的版本。该计划项目的主要目标是开发一个开放式和跨平台的软件工具，以记录和跟踪科学海洋钻探核心地点的所有已公布和未来的综合记录，即海洋钻探综合跟踪器。科学家可以使用该工具生成具有样本识别以及复合深度的样本列表，反之亦然，用于不同的复合版本，检索不属于复合记录的平行部分中的替代样本位置，根据岩心数据库中的复合提取数据，并使用已发布的年龄模型检索样本或数据的年龄。该工具是应用机器辅助数据分析和提取的一个步骤。