Foliar contributions to methane and nitrous oxide exchange in urban green roof systems

The dataset integrates foliar gas flux measurements (co2_flux, ch4_flux, n2o_flux, h2o_flux), substrate gas flux measurements (soil_co2, soil_ch4, soil_n2o, soil_h2o), environmental covariates (gas_temperature, ambient_temperature), substrate physicochemical properties (soil_temp, soil_moisture, soil_ph, soil_ec, soil_c_percent, soil_nitrogen_percent), and plant tissue chemistry (leaf_c_percent, leaf_nitrogen_percent).

Flux values are reported as area- and time-normalized exchange rates, where negative CH₄ values indicate net uptake and positive N₂O values indicate net emission. The dataset supports analyses of seasonal variability, treatment effects, plant functional differences, and mechanistic linkages between substrate properties and GHG exchange. It is suitable for statistical modeling, structural equation analysis, comparative urban ecosystem studies, and scaling assessments of green roof contributions to urban greenhouse gas budgets.

Missing values are coded as NA where laboratory measurements were unavailable.