By: Michael Stocker 

It has been known for quite some time that excessive anthropogenic carbon dioxide is modifying ocean chemistry, increasing acidity, and compromising shell growth in calciferous sea life. The effects of this have been confirmed in sea snails, corals, and oysters, but also in marine phytoplankton – the organisms that provide a significant share of the oxygen we breathe.
In these alarming times I don’t want to increase our collective stress levels any more, except to say that turning our backs on this additional cost of a fossil-fueled civilization is not a wise survival strategy. But there is an acoustical component of a warming planet that I’d like to explore.
In 2008 researchers determined that changes in ocean chemistry also had an effect on sound propagation – with the concern that noise would not be so readily absorbed by a more acidic ocean.…