The Ocean is Getting Less Salty
You won't want to drink water straight from the ocean anytime soon. But the salt content is on the decline, a sign of potentially worrisome consequences that scientists can't accurately predict. Since the late 1960s, much of the North Atlantic Ocean has become less salty, in part due to increases in fresh water runoff induced by global warming, scientists say. Now for the first time researchers have quantified this fresh water influx, allowing them to predict the long-term effects on a "conveyor belt" of ocean currents. Climate changes in the Northern Hemisphere have melted glaciers and brought more rain, dumping more fresh water into the oceans, according to the analysis. One of the expected high-profile consequences is a rising sea that will swamp coastal communities. But there are other possible effects. "Precipitation and river runoff at high latitudes have been increasing," said Ruth Curry of the Woods Hole Oceanographic Institution (WHOI)....