The following tables are part of this resource:


Table S1_Trinity_soil_RCWMA_characterization_data

This table contains soil characterization data from samples collected from a backhoe-excavated trench at the study site. The table include standard soil characterization data by horizon.



Table S2_depths of gas wells

This study involved sampling of soil CO2 from soil gas wells constructed of perforated and waterproofed PVC. This table shows the depth intervals of the perforated zone. It also shows the depths at which soil temperature measurements were made.




Table S3_ML table

This table shows the gravimetric water contents and oxygen and hydrogen isotope compositions of soil water (time series and depth profiles). Samples were collected by augering and water was vacuum distilled before isotopic analysis. This table shows data from microlows (microtopographically low areas, lookup gilgai or Vertisol microtopography). The difference from local meteoric water line (LMWL) was calculated by first fitting a straight line through all of the Waco, TX GNIP rainfall d18O and dD data, calculating the LMWL d18O value at the observed soil water dD value and subtracting the observed soil water d18O value from the LMWL d18O value.



Table S4_MH table

This table is the same as the previous table but for microtopographic highs.




Table S5_Soil CO2 and T table

This table contains measured soil CO2 concentrations, CO2 carbon and oxygen isotope compositions, soil temperatures and d18O values of water in equilibrium with CO2 at measured temperatures.




Table S6_GNIP_WACO_rainfall

This table contains Waco, TX GNIP data relevant to the study. These data are not newly reported here. They are included for the convenience of the user. 



Table S7_RCWMA_rainfall_table

This table includes amounts and stable isotope compositions of local rainfall (at the study site) during the period of study. 



Table S8_soil_solution_sampler_water_isotopic_compositions

This table includes isotopic compositions of soil water collected under tension (300 bars) in the field using a soil solution sampler. The depth at which the soil solution sampler sampled soil water was 140 cm.