Abstract
The GEOTRACES Intermediate Data Product 2014 (IDP2014) is the first publicly available data product of the international GEOTRACES programme, and contains data measured and quality controlled before the end of 2013. It consists of two parts: (1) a compilation of digital data for more than 200 trace elements and isotopes (TEIs) as well as classical hydrographic parameters, and (2) the eGEOTRACES Electronic Atlas providing a strongly inter-linked on-line atlas including more than 300 section plots and 90 animated 3D scenes. The IDP2014 covers the Atlantic, Arctic, and Indian oceans, exhibiting highest data density in the Atlantic. The TEI data in the IDP2014 are quality controlled by careful assessment of intercalibration results and multi-laboratory data comparisons at cross-over stations. The digital data are provided in several formats, including ASCII spreadsheet, Excel spreadsheet, netCDF, and Ocean Data View collection. In addition to the actual data values the IDP2014 also contains data quality flags and 1-σ data error values where available. Quality flags and error values are useful for data filtering. Metadata about data originators, analytical methods and original publications related to the data are linked to the data in an easily accessible way. The eGEOTRACES Electronic Atlas is the visual representation of the IDP2014 data providing section plots and a new kind of animated 3D scenes. The basin-wide 3D scenes allow for viewing of data from many cruises at the same time, thereby providing quick overviews of large-scale tracer distributions. In addition, the 3D scenes provide geographical and bathymetric context that is crucial for the interpretation and assessment of observed tracer plumes, as well as for making inferences about controlling processes.
Highlights
GEOTRACES is an international study of the marine biogeochemical cycles of trace elements and their isotopes (TEIs), designed by marine geochemists to accelerate trace elements and isotopes (TEIs) research under a global program
The Intermediate Data Product 2014 (IDP2014) consists of two parts: (1) the digital data compilation of trace elements and isotopes (TEIs) as well as classic hydrographic parameters and (2) the eGEOTRACES Electronic Atlas providing section plots and animated 3D scenes of the data
The new 3D visualisation techniques and the strong inter-linkage of sections and 3D scenes provided by the eGEOTRACES Atlas aids the scientific interpretation of TEI data, and facilitates outreach to a wider community, including scientists from different disciplines and the general public and policy makers
Summary
GEOTRACES is an international study of the marine biogeochemical cycles of trace elements and their isotopes (TEIs), designed by marine geochemists to accelerate TEI research under a global program. GEOTRACES decided in 2011 to create and release the GEOTRACES Intermediate Data Product 2014 (IDP2014). By releasing and sharing the data at an early stage, GEOTRACES intends to strengthen and intensify collaboration within the geochemical community itself, and to attract and invite colleagues from other communities, such as physical and biological oceanography, as well as modelling, to apply their unique knowledge and skills to marine geochemical problems. The release of the IDP2014 provides the extensive and high-quality observational dataset needed for conducting the many new collaborative projects and modelling studies initially discussed at these workshops and aimed at improving our understanding of the cycling of TEIs in the ocean and quantifying respective sources and sinks (GEOTRACES, 2006). The IDP2014 consists of two parts: (1) the digital data compilation of trace elements and isotopes (TEIs) as well as classic hydrographic parameters and (2) the eGEOTRACES Electronic Atlas providing section plots and animated 3D scenes of the data
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