In oceanography, what is the term given to the deep ocean layer where there is a rapid decrease in water temperature with increasing depth?

💡 Solution & Explanation

A thermocline marks the transitional ocean layer characterized by a steep vertical temperature gradient separating warm surface waters from cold deep waters. Haloclines denote rapid salinity changes with depth, while pycnoclines describe gradients in water density. Ocean thermal stratification plays a significant role in regulating marine ecosystems and global climate patterns.