Constraining the trend in the ocean CO sink during 2000-2022.

The ocean will ultimately store most of the CO emitted to the atmosphere by human activities. Despite its importance, estimates of the 2000-2022 trend in the ocean CO sink differ by a factor of two between observation-based products and process-based models. Here we address this discrepancy using a hybrid approach that preserves the consistency of known processes but constrains the outcome using observations.