Read me for 'Carbon Dioxide Production In Bedrock' dataset

All of the methods, maps, and results from this dataset can be found in the publication:

Tune, A. K., Druhan, J. L., Wang, J., Bennett, P. C., & Rempe, D. M. (2020). Carbon Dioxide Production in Bedrock Beneath Soils Substantially Contributes to Forest Carbon Cycling. Journal of Geophysical Research: Biogeosciences, 125(12). https://doi.org/10.1029/2020JG005795

File information:

1) co2_o2_concentrations.xlsx

This file contains the CO₂ and O₂ concentrations sampled from the VMS in the bedrock vadose zone on an approximately biweekly basis. All concentrations are reported as percentages.

2) depth_table.xlsx

This file contains the depths of each sensor and sampling apparatus in the VMS. Each of the VMS ports and sensors extend for a depth interval recorded by the columns labled 'shallower end' and 'deeper end'. The column labeled the 'average depth' is the mean of these two depths. The column recording saturation state indicates the year-round wetness state of the port. The 'material sampled' indicates where in the material weathering profile the port is located. The depth relative to the well head is the depth relative to the top of the VMS where it exit the ground surface near the control panel. The depth relative to the ground suface accounts for the slight changes in topography vertically above each port.

3) diffusion_coefficient.xlsx

This file contains the calculated mean diffusion coefficients of CO_2,(g) in the weathered bedrock for each sample date for the upper 3 ports. The diffusivity is calculated according to the method outlined in Tune (2020) using the data in the subsurface_temperature.xlsx file. The 5% and 10% distinction in the column titles refers to using a 5 or 10% air-filled porosity to calculate the diffusion coefficient.

4) relative_rock_moisture.xlsx

This file contains the relative rock moisture content, as a fraction, in the weathered bedrock for each sample date for each TDT sensor. The depths of the TDT sensors are recorded in the depth_table.xlsx file. These values are derived from the water content measured by the VMS TDT sensors available through Dendra Science where all of the monitoring data at the Eel River Critical Zone Observatory is stored, retrieved, managed, and curated.

5) soil_efflux.xlsx

This file contains the CO_2,(g) flux measurements from the top of the soil measured from May to October in 2018.

6) subsurface_temperature.xlsx

This file contains the temperature of the bedrock environment for each sample date measured by the VMS TDT sensors available through Dendra Science. All temperatures are in celcius.