Sounds travel further underwater as oceans become more acidic?

摘要

Conservative projectionsby the IntergovernmentalPanel on Climate Change(IPCC) suggest that thechemistry of seawater couldchange by 0.3 pH units by2050. If changes of this mag-nitude occur, Dr Keith Hesterand his colleagues calculatethat this change in oceanacidity would allow sounds totravel up to 70 percent fur-ther underwater. This willincrease the amount of back-ground noise in the oceansand could affect the behav-iour of marine mammals.