The phrase "freshwater input" refers to the amount of clean water that flows into a body of water like a river, lake, or ocean. It can come from sources such as rainfall, melting snow, or rivers that carry freshwater to the area. Full definition
However, according to Braun et al. (2005), D - O events could be caused by a combination of solar cycles and freshwater input into the North Atlantic Ocean. (skepticalscience.com)
Shifting currents, increased freshwater input from melting sea ice and glaciers, and changes in upper and lower sea - level circulation patterns are already occurring, and they'll progress rapidly if anthropogenic greenhouse gas emission continues under a business - as - usual scenario. (biologicaldiversity.org)
The thermohaline circulation of the global ocean is controlled in part by freshwater inputs to northern seas that regulate the strength of North Atlantic Deep Water formation by reducing surface seawater density. (mbl.edu)