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.

科学海洋钻探的一个关键概念是为了从海底恢复连续数百万年的连续跨度。在给定的位置钻多孔，并随后未经干扰和完整的沉积物序列的组合使科学家可以检索出杰出的，几百米的厚记录，以进行古气候重建。五十年的海洋钻孔清楚地表明，一个钻孔不足以解决识别因果机制所需的气候变化的进展。来自多个钻孔的复合记录已成为古环学研究的骨干，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探险中，从海底取回完全的沉积物继承，由地层相关器通常在船上形成复合材料。复合记录的质量主要取决于核心突出特征的仔细相关性，这又取决于用于关联的数据的质量。此外，为了评估，验证和改善船上复合记录其他更多耗时的技术，具有更高的信噪比，可以实质性地修订的复合记录，并且有时会揭示重复的差距或复合记录中的重复间隔。因此，在探险检查和修订几年后，可能会导致具有多个已发表版本的迭代发展的复合材料。计划项目的主要目标是开发开放式访问和跨平台软件工具，以记录和跟踪科学海洋钻探核心站点的所有已发表的和未来的复合记录，即海洋钻井综合跟踪器。科学家可以使用此工具来生成具有样品识别的样本列表以及复合深度，反之亦然，以不同的复合版本，在不属于复合记录的一部分的并行部分中检索替代样品位置，根据钻头核心数据库提取数据，并使用已出版的年龄模型从钻头核心数据库中提取数据。该工具是应用机械辅助数据分析和提取的一步。