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

在科学大洋钻探中，为了从海底恢复连续的数百万年序列，一个关键概念是形成复合记录。在一个给定的地点钻多个洞，并随后组装一个未受干扰的完整的沉积物序列，使科学家能够检索到数百米厚的杰出记录，用于重建古气候。五十年的大洋钻探清楚地表明，一个单一的钻孔不足以解决气候变化的进程，这是确定原因机制所需的。来自多个钻孔的综合记录已经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，在为期两个月的旨在从海底恢复全部沉积物序列的ODP/IODP考察期间，地层相关器通常会在船上形成一个复合体。综合记录的质量主要取决于核心中突出特征的仔细关联，而这又取决于用于关联的数据的质量。此外，评估、验证和改进舰船合成记录其他更耗时、信噪比更高的技术有助于大幅修改合成记录，有时还会揭示合成记录中的主要差距或重复间隔。因此，在考察数年后，检查和修订可能会导致迭代地演变为具有多个已发布版本的复合体。计划中的项目的主要目标是开发一个开放获取和跨平台的软件工具，以记录和跟踪所有已公布和未来的科学海洋钻探核心地点的综合记录，即海洋钻探综合追踪器。科学家可以使用该工具为不同的合成版本生成具有样品标识以及合成深度的样品列表，检索不同合成记录的平行部分中的替代样品位置，根据合成从钻芯数据库中提取数据，以及使用公布的年龄模型检索样品或数据的年龄。这一工具是向应用机器辅助数据分析和提取迈出的一步。

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.