A global dataset of soil particulate organic carbon
Data files
Nov 21, 2024 version files 2.09 MB
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POC_0_100.csv
497.55 KB
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POC_0-30.csv
1.59 MB
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README.md
4.05 KB
Abstract
The original data for this paper collected from publised papers, including soil paticulate organic carbon concentration, geographic information (latitude, longtidue), soil properties (soil type, soil texture, soil moisture, soil temperature,soil pH, bulk density, porosity,total organic carbon, total nitrogen, soil dissolved carbon, soil dissovled nitrogen, soil microbial biomass carbon, soil microbial biomass nitrogen), climatic information (mean annual air temperature, mean annual precipitation), vegetation type, sampling dates and depth. A total of 3,418 data points were finally collected from the LUCAS database and 244 publications from 1988 to 2020. The database was divided into two groups: one group consists of 2,507 data points for topsoil (0 – 30 cm) in 632 sites and 911 data points for soil profile (0 – 100 cm) in 55 sites.
https://doi.org/10.5061/dryad.sbcc2frhh
Description of the data and file structure
All data was collected from published paper by searching “soil particulate organic carbon” at Web of Science and Google Scholar. We derived the data points from tables involving soil POC and/or extracted from figures vis the Engauge Digitizer software version 10.7. Climate, edaphic, and microbial data not mentioned in papers were extracted from global datasets following our previous studies. SOC, TC, and BD were downloaded from the Harmonized World Soil Database (HWSD, https://daac.ornl.gov/cgibin/dsviewer.pl?ds_id=1247) at a 0.05° × 0.05° resolution grid. Soil C, BD, and TN were extracted from the IGBP-DIS dataset (IGBP, https://daac.ornl.gov/SOILS/guides/igbp-surfaces.html) at a spatial resolution of 0.5′ × 0.5′. MAT and MAP were obtained from the WorldClim database version 2 with a spatial resolution of 30 seconds during 1970 – 2000 (https://www.worldclim.org/data/worldclim21.html). Missing data are entered as Na.
Files and variables
File: POC_0_100cm.csv
Description:
Variables
- ID: Original Sample ID
- NO.: Sample ID
- Country:
- bd_igbp (g cm-3): Bulk Density from igbp
- tn_igbp (g kg-1): total nitrogen from igbp
- tc_igbp (g kg-1): total carbon from igbp
- CN ratio: carbon :nitrogen ratio
- tc_hwsd (kg C m-2): total carbon from hwsd
- soc_hwsd (%): soil organic carbon from hwsd
- soc_hwsd (g/kg): soil organic carbon from hwsd
- SM_yearly (v/v): mean annual soil moisture
- sand (%):
- Cden_bel (kg m-2): root carbon density
- pH:
- NPP (g m-2 yr-1): net primarily productivity
- MAP (mm): mean annual precipitation
- MAT (deg C): man annual temperature
- clay (%):
- silt (%):
- bd_hwsd (g cm-3): bulk density from hwsd
- ST_yearly (deg C): mean annual soil temperature
- porosity_bottom:
- porosity_midlayer:
- porosity_toplayer:
- Biome S:
- Lat F: latitude
- Long F: longitude
- Sand F:
- Silt F:
- Clay F:
- BD F:
- Porosity F:
- SM F:
- TOC g/kg F:
- SOC g/kg F:
- TN g/kg F:
- pH F:
- C/N F:
- POC Sample Type: soil type
- iPOC Total(g/kg_53-2000): POC standardized via igbp
- hPOC Total(g/kg_53-2000): POC standardized via hwsd
- Group T: group
- POC Calcul F:
- POC Fractions:
- POC Value Type F:
- POC Covert:
- Date F:
- Depth F:
- Reference:
- Method POC_C:
- Method POC:
- Method F:
File: POC_topsoil.csv
Description:
Variables
- ID_corri:
- NO.:
- Site:
- Country:
- bd_igbp (g cm-3):
- tn_igbp (g kg-1):
- tc_igbp (g kg-1):
- CN ratio:
- tc_hwsd (kg C m-2):
- tc_hwsd (g/kg):
- soc_hwsd (%):
- SM_yearly (v/v):
- sand (%):
- Cden_bel (kg m-2):
- pH:
- NPP (g m-2 yr-1):
- MAP (mm):
- MAT (deg C):
- clay (%):
- silt (%):
- bd_hwsd (g cm-3):
- ST_yearly (deg C):
- porosity_bottom:
- porosity_midlayer:
- porosity_toplayer:
- Biome S:
- Lat F:
- Long F:
- MAT F:
- MAP F:
- Sand F:
- Silt F:
- Clay F:
- BD F:
- Porosity F:
- SM F:
- TOC g/kg F:
- SOC g/kg F:
- TOC g/kg:
- TN g/kg F:
- pH F:
- C/N F:
- POC Sample Type:
- iPOC Total(g/kg_53-2000):
- hPOC Total(g/kg_53-2000):
- Group T:
- Flotation:
- POC Calcul F:
- POC Fractions:
- POC Value Type F:
- POC Covert:
- Treatment Type F:
- Date F:
- Depth F:
- Reference:
- Method POC_C:
- Method POC:
- Method F:
- POC-iTC:
Code/software
Engauge Digitizer software version 10.7 (http://digitizer.sourceforge.net/)
Scikit-learn packages (version 0.23.2, https://scikit-learn.org) for Python (version 3.7.5, https://www.python.org/)
RStudio software version 4.0.3 (http://www.rstudio.com/)
ORIGIN Pro 2023 (http://www.originlab.com/)
ArcGIS software (version 10.8, ESRI, Redlands, CA)
The data were collected from publications by searching “soil particulate organic carbon” in Web of Science and Google Scholar. We derived the data points from tables involving soil POC and/or extracted from figures vis the Engauge Digitizer software version 10.7.