The global ocean is a major sink of anthropogenic CO₂ emissions and plays a critical role in the global carbon cycle. The Global Carbon Budget (GCB) reports the air-sea CO₂ flux estimates from both global ocean biogeochemistry models (GOBMs) and observation-based sea surface CO₂ (fCO₂) products. Recent studies suggest that air-sea gas exchange processes such as the cool-skin effect, rainfall, bubble-mediated transfer, and high-frequency atmospheric variability have been neglected in the flux estimate, but can substantially alter the observation-based  global ocean CO₂ sink estimate. However, their impacts on global ocean biogeochemistry models remain poorly quantified. Here, we implement an enhanced air-sea gas exchange framework in the NEMO-PISCES model and assess the effects of these processes on simulated ocean CO₂ uptake. By comparing model sensitivities with previously reported observation-based estimates, we evaluate the extent to which ocean biogeochemical feedbacks modify the response of the ocean carbon sink to air-sea exchange processes. Our results provide new insights into the role of near-surface air–sea interactions in shaping model-based estimates of the contemporary ocean carbon sink.