Paper: Scenarios of Deoxygenation of the ETNP During the Past Millennium as a Window Into the Future of OMZs

Please take a look at our new paper, where we discuss the potential mechanisms of fast-paced Oxygen Minimum Zone (OMZ) variability in coastal regions of the Eastern Tropical North Pacific (ETNP).

Over glacial-interglacial time scales, dissolved oxygen availability in the ocean is known to be controlled by global climatic and circulation trends sometimes even decoupled from primary productivity. On the contrary, at the submillennial resolution, marine productivity is the driving force that shifts the OMZ from contracted to an expanded state and vice versa. We hypothesize that the Pacific Decadal Oscillation (PDO) is the driving mechanism by which upwelling rates increase in the ETNP as the colder PDO phases kick in (more frequent La Niña years) leading to higher productivity and OMZ expansion.

Link to the paper 

Direct link to the PDF