Global Warming: Present status of the impact of ocean acidification on low frequency acoustic transmission.

A tremendous amount of carbon goes into the earth's atmosphere every hour, greatly exceeding the earth's ability (trees and ocean) to absorb it. This has resulted in an increasing atmospheric CO2 level and as a significant amount gets absorbed into the ocean, forming carbonic acid,,ocean acidification results. This has several impacts among them shell decalcification and, perhaps surprisingly,improving the transmission of low frequency sound. This is because the major component of absorption of low frequency sound in seawater is a boron reaction that is pH dependent (lower pH results in lower absorption).As part of the Paris Agreementin in 2015 numerous nations have agreed to reduce the CO2 output to be equal to the earth's ability to absorb it.by 2050. By now this sharp reduction should be starting. Unfortunately at present (2023) the CO2 level has instead increased to a new high due to record coal consumption which as caused by several extenuating factos: a drought in China and a gas shortage in Europe. In 2025 the members of the Paris Agreement will conduct an evaluation of present reduction programs and may suggest possible adjustments.