Complex sentence: More recently, a density criterion has been used to define the MLD, defined as the depth where the density increases from the surface value due to a prescribed temperature decrease of 0.2 o C from the surface value while maintaining constant surface salinity value.
Split into simpler sentences: More recently, a density criterion has been used to define the MLD. The density-derived MLD is defined as the depth where the density increases from the surface value due to a prescribed temperature decrease of 0.2 o C from the surface value while maintaining constant surface salinity value.