Dataset: POC0

Name: POC concentration at the sediment water interface quantified from bio-energetic modeling on a 0.25°×0.25° resolution global grid
Published: 2020-11-13
Keywords: oceans

Cite This Dataset

Spatial Extent: N:90 E:180 S:-90 W:-180

Project:

Develop a 1D biogeochemical-evolutionary model for deep sediments (BIO-SED)

Program:

Center for Dark Energy Biosphere Investigations (C-DEBI)

Principal Investigator:

James Bradley (Queen Mary University of London)

Co-Principal Investigator:

Doug LaRowe (University of Southern California, USC)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2020-11-13

Restricted:

Validated:

Current State:

Preliminary and in progress

POC concentration at the sediment water interface quantified from bio-energetic modeling on a 0.25°×0.25° resolution global grid

Abstract:

Particulate organic carbon (POC) concentration at the sediment water interface. These data are part of a project that used bio-energetic modeling to quantify a number of subseafloor parameters on a 0.25°×0.25° resolution global grid. These data were published in Bradley et al. (2020).

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Description

Additional funding to the Center for Dark Energy Biosphere Investigations [C-DEBI] award OCE-0939564:

Deep Carbon Observatory (the Deep Life Modelling and Visualization (DLMV) and Deep Energy programs); NASA Astrobiology Institute–Life Underground (NAI-LU, NNA13AA92A); the NASA Astrobiology Program under the Joint NASA-NSF Ideas Lab on the “Origins of Life” (NSF Solicitation 16-570); the Alexander von Humboldt Foundation; NERC (NE/T010967/1); European Union Horizon 2020 under the Marie Skłodowska-Curie grant agreement no. 643052 (C-CASCADES); USC Zumberge Fund Individual Grant Program.

Methods & Sampling

This project used bio-energetic modeling to quantify a number of subseafloor parameters on a 0.25°×0.25° resolution global grid. We calculate, in three dimensions, for all Quaternary-age sediment (i.e. global sediment deposited in the last 2.59 million years):

• The global distribution and rate of particulate organic carbon (POC) degradation.

• The global distribution of cells, using data from Kallmeyer et al, 2012. (DOI: 10.1073/pnas.1203849109).

• The global distribution of electron acceptors, using data from D’Hondt et al, 2015 (DOI: 10.1038/ngeo2387) and Egger et al, 2018 (DOI: 10.1038/s41561-018-0122-8)

• The thermodynamic properties of POC degradation.

• The cell-specific power (i.e. energy per unit time) per individual microbial cell.

Data are provided on a 721×1441 grid, where each cell represents 0.25°×0.25°. Grid cell (1,1) corresponds to (-90.00,-180.00). Separate grids are provided for sediment at 10cm beneath the seafloor, at the layer of sediment deposited at the beginning of the Holocene (11,700 years ago), and the layer of sediment deposited at the beginning of the Pleistocene (2.59 million years ago).

Data Processing Description

Data were processed using Matlab (R_2017a). Data are provided on a 721×1441 grid, where each cell represents 0.25°×0.25°. Grid cell (1,1) corresponds to (-90.00,-180.00).

BCO-DMO data manager processing notes:
* Zipped together the three EA map .mat files to serve in this dataset.
* Also exported the matrices as csv files using Matlab's writematrix() function.

Data Files

File
POC0 (Matlab .mat format) filename: POC0.mat (MATLAB Data (.mat), 3.60 MB) MD5:ee8426d2dd408dcbe56020ac89717172 Gridded data in a matrix within a Matlab *.mat file. Name: POC0.mat Description: POC concentration at the sediment water interface. Units: g C cm-3 Missing data identifier: NaN