Modeling dissolved oxygen in the Pacific Ocean

In the context of climate change and its associated effects, such as ocean warming and human activities, the decrease of oxygen content in the ocean is observed throughout the year. This decline in oceanic oxygen levels can significantly impact the biogeochemistry and biology of the ocean’s ecosystem. To simulate the human activities, we simulate the Pacific Ocean biogeochemistry and biology with different atmospheric deposition of nitrogen. As expected, increased atmospheric nitrogen deposition leads to higher nitrate concentrations and primary productivity, but a lower oxygen level. This decrease is due to the increased remineralization rate of organic matter resulting from the augmented primary production. This master thesis exclusively examines the effect of atmospheric deposition and acknowledges the need to incorporate additional factors induced by climate change, such as ocean circulation patterns and ocean warming, to comprehensively understand the genuine impact of climate change on the Pacific Ocean’s biogeochemistry and dissolved oxygen levels.