Bottom water consists of cold, dense water near the ocean floor. This water is characterized by low salinity and nutrient content. Generally, low salinity from seasonal ice melt and freshwater river output characterizes bottom water produced in the Antarctic.
The description of bottom water emphasizes its characteristics: cold, dense, low salinity, and low nutrient content. It specifically mentions that this type of water is prevalent in the Antarctic due to seasonal ice melt and freshwater river runoff.