The close connection that exists between the atmosphere and the ocean is not surprising considering that 70% of the planet is covered by water—about 360 million km2—and the few dozen km of air is extremely thin compared to the 12,750 km diameter of Earth. This means that about 90% of the atmospheric heating caused by rising concentrations of CO2 is transferred to the oceans.
In approximate terms, about one-third of the carbon dioxide we add to the atmosphere by burning fossil fuels stays there for centuries, about one-third is captured and sequestered in various land forms such as forests, soils and vegetation, although one recent United Nations study suggests the terrestrial sequestration may only be about 25%, possibly because forest and plant cover is being diminished by agriculture and fires, and because a higher global temperature is reducing the photosynthesis process by which plants process carbon dioxide into carbon, sugars and oxygen. Much of the remaining one-third of our CO2 emissions that is not absorbed by marine algae dissolves in the oceans to form carbonic acid.
Continue reading The Quadra Project – Warming Oceans