From 1960 to 2010, climate change has led globally to a 2 percent global decline of O2 in the oceans. Earth system models struggle to accurately reproduce the observed mean state of O2-distributions and tend to have too low O2-values. They also significantly underestimate the ongoing O2-decline in our oceans.

O2Ocean is a project aiming to characterize, disentangle and validate the drivers that cause a too conservative O2 decline in climate models with the goal to present regional solutions for improved O2 projections.