Seminar: Loss of fixed nitrogen causes net oxygen gain in a warmer future ocean.

Andreas Oschlies (GEOMAR Helmholtz Centre for Ocean Research). Oceanic anoxic events have been associated with warm climates in Earth history, and there are concerns that current ocean deoxygenation may eventually lead to anoxia. On the contrary, results of a multi-millennial global-warming simulation reveal, after a transitory deoxygenation, a marine oxygen inventory 6% higher than preindustrial despite an average 3°C ocean warming. The initial, centennial-scale ~20% decline of oxygen is consistent with earlier studies and reflects changes in solubility and ocean... View Article