<p>Global estimation of sea surface partial pressure of CO₂ (pCO₂) is becoming increasingly important in the context of global climate change and the associated environmental impacts occurring in various parts of the world’s oceans. In the present study, ISRO’s EOS-06 ocean color monitor (OCM-3) derived chlorophyll (Chl-a) data is utilized for estimating pCO₂ variability over the global oceans. The analysis is carried out for a period of six months from April to August 2023. The recently developed multi-parametric nonlinear regression methodology is adopted in the present study to estimate the pCO₂ distribution over the global ocean using satellite-derived sea surface temperature, salinity, and Chl-a. From the analysis, it is observed that the global oceanic pCO₂ variability estimated from the present study substantiates that the pCO₂ is high over the tropical region as compared to sub-polar and polar region. As a result of the dependency of pCO₂ distribution on the upper ocean biological processes through photosynthesis, respiration, and calcification the global distribution of pCO₂ also varies locally based on this. The Chl-a concentration is found to be high near the coastal regions, eastern Pacific Ocean and Polar regions. The pCO₂ decreases near the high productivity Polar regions in response to the enhanced photosynthesis processes undergoing in these regions. Surface pCO₂ is high (~ 500 to 530 µatm) over the eastern and central Pacific Ocean as compared to the western region as upwelling occurs over the eastern Pacific Ocean which brings carbon rich water from the subsurface to the ocean surface. The pCO₂ decreases from April to August over the Arctic and subarctic region as a result of an increase in Chl-a concentration.</p>