Nitrogen is the most abundant gas in seawater, accounting for approximately 78% of the total dissolved gases.

Photosynthesis by marine plants and algae is the primary source of oxygen in seawater.

Carbon dioxide reacts with water to form carbonic acid, which plays a crucial role in the ocean's acidity and carbonate chemistry.

Diffusion is the primary process by which gases are exchanged between the atmosphere and the ocean.

Carbon dioxide is the primary greenhouse gas in the atmosphere, contributing to the trapping of heat and the regulation of Earth's climate.

Gas saturation refers to the concentration of dissolved gases in seawater relative to their equilibrium concentration.

Nitrogen is the primary gas responsible for the formation of bubbles in seawater, particularly when the pressure decreases, such as during decompression.

Degassing refers to the process by which gases are released from seawater into the atmosphere.

Methane is the primary gas responsible for the formation of methane hydrates, which are ice-like structures that contain methane molecules trapped within a lattice of water molecules.

Advection refers to the process by which gases are transported by ocean currents.

Sulfur dioxide is the primary gas responsible for the formation of acid rain, which occurs when sulfur dioxide and other pollutants react with water vapor in the atmosphere.

Absorption refers to the process by which gases are taken up by seawater.

Oxygen is the primary gas responsible for the formation of ozone in the stratosphere, which plays a crucial role in protecting Earth from harmful ultraviolet radiation.

Degassing refers to the process by which gases are released from seawater due to changes in temperature, pressure, or other factors.

Ozone is the primary gas responsible for the formation of smog in urban areas, which occurs when ozone and other pollutants react with sunlight.