the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
The Modern Ocean Sediment Archive and Inventory of Carbon (MOSAIC): version 2.0
Kai Nakajima
Tessa S. Van der Voort
Hannah Gies
Aline Wildberger
Thomas Blattmann
Lisa Bröder
Tim Eglinton
Abstract. Marine sediments play a crucial role in the global carbon cycle by acting as the ultimate sink of both terrestrial and marine organic carbon. To understand the spatiotemporal variability in the content, sources and dynamics of organic carbon in marine sediments, a curated and harmonized database of organic carbon and associated parameters is needed, which has prompted the development of the Modern Ocean Sediment Archive and Inventory of Carbon (MOSAIC) database. We present here MOSAIC version 2.0, which has expanded the spatiotemporal coverage of the original database by ~400 %, and now holds data from more than 17000 individual sediment cores from different continental margins on a global scale. Additional variables have also been incorporated into MOSAIC v.2.0 that are crucial to interpret the distribution of the quantity, origin and age of organic carbon in marine sediments globally. Sedimentological parameters (e.g., grain size fractions, mineral surface area) help understand the effect of hydrodynamic sorting and mineral protection in the distribution of organic carbon, while molecular biomarker signatures (e.g., lignins phenols, fatty acids, alkanes) can constrain the origin of organic matter with a greater level of specificity. MOSAIC v.2.0 also stores data from analyses performed on specific sediment and molecular fractions, which provide further insight of the processes that affect the degradation and ageing of organic carbon in marine sediments. While data included within MOSAIC is not exhaustive, it is continuously expanding and version control will allow users to benefit from updated versions while ensuring reproducibility of their findings.
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Sarah Paradis et al.
Status: open (until 29 Jun 2023)
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RC1: 'Comment on essd-2023-158', Anonymous Referee #1, 21 May 2023
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Paradise et al., present the latest version of the MOSAIC database which has grown to over 17,000 sediment cores a 400% rise over the original incarnation (Van Voort et al., 2021). Additionally, the updated metadata structure is now in line with the latest reporting standards highlighting the methodological approach used to produce the data, which make the database entries truly comparable.
The manuscripts highlight the different types of data within the database, which importantly for the version now includes sediment/molecular fractions which is a substantial step forward. The authors also described ideas for the future expansion of the database to include other variables (metals, other biomarkers, etc.).
The manuscript provides an opportunity to highlight what data is still missing, it may be useful to add some text on these crucial variables that are still missing, for example dry bulk density (as highlighted in the text). The manuscript good go further by providing a list of simple requirements to improve the data quality for the wider community – sampling method, date, analytical method. This is not crucial for publication but could be very useful for the community.
The MOSAIC database V2 is a globally important tool in understanding the role of marine sediments in the global climate and carbon cycle and is well suited to publication in Earth System Science Data.
Citation: https://doi.org/10.5194/essd-2023-158-RC1
Sarah Paradis et al.
Data sets
Dataset S1: Quality-check control for each variable Sarah Paradis, Kai Nakajima, Tessa S. Van der Voort, Hannah Gies, Aline Wildberger, Thomas Blattmann, Lisa Bröder, Tim Eglinton https://github.com/sarah-paradis/MOSAIC/blob/main/Datasets/DatasetS1.csv
Dataset S2: Analyses stored in MOSAIC Sarah Paradis, Kai Nakajima, Tessa S. Van der Voort, Hannah Gies, Aline Wildberger, Thomas Blattmann, Lisa Bröder, Tim Eglinton https://github.com/sarah-paradis/MOSAIC/blob/main/Datasets/DatasetS2.csv
MOSAIC 2.0 Sarah Paradis, Kai Nakajima, Tessa S. Van der Voort, Hannah Gies, Aline Wildberger, Thomas Blattmann, Lisa Bröder, Tim Eglinton http://mosaic.ethz.ch/
Sarah Paradis et al.
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