Some scientists are concerned that just as thermohaline circulation has changed significantly over time, it could change again and possibly cause abrupt climate change in both the United States and Europe.
Thermohaline circulation is driven by differences in temperature and salinity, as opposed to circulation driven by wind. Understanding patterns of water movement may be crucial to better understanding global climate and climate change.
Obtaining accurate salinity measurements is vitally important because salt, along with temperature, has a significant impact on the density of seawater. And this, in turn, greatly affects ocean structure and circulation.
The movement of water due to differences in density is called thermohaline circulation. This process is responsible for not only the vertical movement of ocean water, but for the circulation of the global ocean as a whole.