To address the lack of continuous ground-based CO₂ measurements in the Indo-Gangetic Plain, we started ground-based measurements of atmospheric CO₂ concentrations, for the very first time at Sonipat within the IGP. Based on these measurements, we examined the seasonal and diurnal patterns of atmospheric CO₂. We found that the interplay of anthropogenic emissions, biospheric fluxes, and prevailing meteorology contributes to the observed high seasonal and diurnal variability of atmospheric CO₂.