Which mechanism causes oceanic stratification when freshwater runoff increases from glacial streams?

💡 Explanation

When freshwater runoff increases, reduced salinity leads to halocline formation because freshwater dilutes the surface ocean layers, decreasing their density relative to deeper, saltier water. Therefore, stratification results due to differing densities rather than changing temperatures or downwelling from increased density.

• Which risk increases for structures founded upon unstable alluvial soils?
• Which mechanism amplifies volcanic explosivity when magma ascending through a subduction zone encounters groundwater near the surface?
• Which long-term outcome arises after a river erodes the neck of an oxbow lake during annual floods?
• Which outcome occurs when intense tropical weathering increases soil acidity?
• Which mechanism leads to increased stream flooding in mountainous regions following extensive deforestation?
• Which mechanism causes the formation of an escarpment along a normal fault line?