Global distribution of dissolved oxygen

 　This shows the global distribution of dissolved oxygen concentration at a depth of 750m, where the oxygen minimum layer is found, and at a depth of 3000m.(Note the different ranges of the color bars in the images above and below)

　At a depth of 750 m, oxygen concentrations are low on the African coast of the Atlantic Ocean. It is characterized by a higher oxygen concentration than the surrounding area in the subtropics of the northwestern Pacific Ocean (around 30 degrees north latitude). Why.

This is a distribution map of apparent oxygen consumption (AOU) at depths of 750m and 3000m in the entire ocean. Roughly speaking, there is an inverse relationship with the global distribution of oxygen concentration.

　In marine chemistry, it is standard practice to consider the vertical distribution of each parameter, so let's compare the vertical distributions of dissolved oxygen (DO) and apparent oxygen consumption (AOU). Can you immediately tell me which is the North Atlantic or the North Pacific in the graphs ① and ②?

北大西洋亜熱帯north atlantic subtropics　飽和濃度saturation concentration　北太平洋亜寒帯North Pacific Subarctic　溶存酸素dissolved oxygen