Acid Oceans Also Noisier

Facts matter: Sign up for the free Mother Jones Daily newsletter. Support our nonprofit reporting. Subscribe to our print magazine.


co2-whales-400.jpg

Increasing atmospheric CO2 increases the acidity of seawater, which allows sounds, like whale calls, to travel farther.
Image: (c) 2008 MBARI (Base image courtesy of David Fierstein)

The acidification of seawater due to absorption of atmospheric CO2 is also enabling sound waves to travel farther. That’s bad news for marine life, including whales and dolphins, who rely on sound for hunting and communication and who are already stressed by noisy ship traffic and military sonar.

A team from the Monterey Bay Aquarium Research Institute predicts that underwater sounds will travel up to 70 percent farther in some areas in 2050 than they do today. Whales could be heavily impacted. Military sonar already disrupt whale behavior more than 300 miles away. Dolphins and fish that use sound to locate prey, to avoid predators, and to defend their territories, will also be affected.

Think of it as our world suddenly getting way, way brighter, blindingly bright, with no sunglasses anywhere. The study, published in Geophysical Research Letters, used IPCC projections that ocean pH will drop by 0.3 units by 2050—four times faster than the the past 250 years. The researchers also conducted field and lab experiments testing sound conductivity while estimating increases in ocean temperature and reductions in oxygen content, conditions also affecting underwater acoustics.

Julia Whitty is Mother Jones’ environmental correspondent, lecturer, and 2008 winner of the Kiriyama Prize and the John Burroughs Medal Award.

THE TRUTH...

is the first thing despots go after. An unwavering commitment to it is probably what draws you to Mother Jones' journalism. And as we're seeing in the US and the world around, authoritarians seek to poison the discourse and the way we relate to each other because they can't stand people coming together around a shared sense of the truth—it's a huge threat to them.

Which is also a pretty great way to describe Mother Jones' mission: People coming together around the truth to hold power accountable.

And right now, we need to raise about $400,000 from our online readers over the next two months to hit our annual goal and make good on that mission. Read more about the information war we find ourselves in and how people-powered, independent reporting can and must rise to the challenge—and please support our team's truth-telling journalism with a donation if you can right now.

payment methods

THE TRUTH...

is the first thing despots go after. An unwavering commitment to it is probably what draws you to Mother Jones' journalism. And as we're seeing in the US and the world around, authoritarians seek to poison the discourse and the way we relate to each other because they can't stand people coming together around a shared sense of the truth—it's a huge threat to them.

Which is also a pretty great way to describe Mother Jones' mission: People coming together around the truth to hold power accountable.

And right now, we need to raise about $400,000 from our online readers over the next two months to hit our annual goal and make good on that mission. Read more about the information war we find ourselves in and how people-powered, independent reporting can and must rise to the challenge—and please support our team's truth-telling journalism with a donation if you can right now.

payment methods

We Recommend

Latest

Sign up for our free newsletter

Subscribe to the Mother Jones Daily to have our top stories delivered directly to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate