MOdern River archivEs of Particulate Organic Carbon: MOREPOC
- 1GEOPS, Université Paris-Saclay-CNRS, Orsay, 91405, France
- 2Université de Paris-Cité, Institut de physique du globe de Paris, CNRS, Paris, 75005, France
- 1GEOPS, Université Paris-Saclay-CNRS, Orsay, 91405, France
- 2Université de Paris-Cité, Institut de physique du globe de Paris, CNRS, Paris, 75005, France
Abstract. The supply of particulate organic carbon (POC) associated with terrigenous solids transported to the ocean by rivers plays a significant role in the global carbon cycle. To advance our understanding of the source, transport, and fate of fluvial POC from regional to global scales, databases of riverine POC are needed, including elemental and isotope composition data from contrasted river basins in terms of geomorphology, lithology, climate, and anthropogenic pressure. Here, we present a new, open-access, georeferenced, global database called Modern River Archives of Particulate Organic Carbon (MOREPOC) version 1.0, featuring data on POC in suspended particulate matter (SPM) collected at 231 locations across 118 major river systems. This database includes 3,424 SPM data entries, among which 2,943 with POC content, 3,260 with stable carbon isotope (δ13C) values, 2,018 with radiocarbon activity (Δ14C) values, 1,838 with total nitrogen content, and 309 with aluminum-to-silicon mass ratios (Al / Si). The MOREPOC database aims at being used by the Earth System community to build comprehensive and quantitative models for the mobilization, alteration, and fate of terrestrial POC. The database is made available on the Zenodo repository in machine-readable formats as data table and GIS shapefile at https://doi.org/10.5281/zenodo.6541925 (Ke et al., 2022).
Yutian Ke et al.
Status: open (until 21 Sep 2022)
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RC1: 'Review of essd-2022-161', Anonymous Referee #1, 10 Aug 2022
reply
This dataset is a comprehensive inventory of TOC, d13C, F14C, C:N ratios, Al:Si ratios, and important methods related metadata for particulate organic carbon collected and analyzed from rivers around the world. This builds significantly upon previously compiled datasets, which have an order of magnitude fewer datapoints that this new dataset submitted by Ke and colleagues. The publication of this dataset is timely, as the number of studies measuring the geochemistry of fluvial POC has increased over the past decade, and more studies are adopting the dual isotope measurement approach. I am excited about the future studies this dataset will enable.
This dataset seems to be thorough with respect to including all available published data and the dataset includes the relevant parameters and metadata needed to understand how the data were collected. However, there are some issues with the dataset, particularly with respect to reporting measurement uncertainties, naming the variables used to represent the data, and formatting and populating sampling dates. There are also minor issues throughout the text that need to be addressed before this manuscript can be published.
After the dataset and manuscript have been revised to address all issues detailed below, I support publication of this manuscript in Earth System Science Data.
Please see the attached PDF file for detailed comments and suggestions for revision.
Yutian Ke et al.
Data sets
MOdern River archivEs of Particulate Organic Carbon: MOREPOC (1.0) Ke, Yutian, Calmels, Damien, Bouchez, Julien, & Quantin, Cécile https://doi.org/10.5281/zenodo.6541925
Yutian Ke et al.
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