The salinity of seawater varies significantly with latitude, being higher in tropical regions due to increased evaporation. This variation plays a crucial role in thermohaline circulation, which drives global ocean currents and influences weather patterns. Interestingly, iron distribution in the ocean is uneven, leading to nutrient-rich coastal areas and barren deep seas. The concept of iron fertilization proposes that adding iron to the deep ocean could stimulate algal blooms, potentially sequestering carbon and combating climate change.
