Acid Oceans Also Noisier

Let our journalists help you make sense of the noise: Subscribe to the Mother Jones Daily newsletter and get a recap of news that matters.


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.

DOES IT FEEL LIKE POLITICS IS AT A BREAKING POINT?

Headshot of Editor in Chief of Mother Jones, Clara Jeffery

It sure feels that way to me, and here at Mother Jones, we’ve been thinking a lot about what journalism needs to do differently, and how we can have the biggest impact.

We kept coming back to one word: corruption. Democracy and the rule of law being undermined by those with wealth and power for their own gain. So we're launching an ambitious Mother Jones Corruption Project to do deep, time-intensive reporting on systemic corruption, and asking the MoJo community to help crowdfund it.

We aim to hire, build a team, and give them the time and space needed to understand how we got here and how we might get out. We want to dig into the forces and decisions that have allowed massive conflicts of interest, influence peddling, and win-at-all-costs politics to flourish.

It's unlike anything we've done, and we have seed funding to get started, but we're looking to raise $500,000 from readers by July when we'll be making key budgeting decisions—and the more resources we have by then, the deeper we can dig. If our plan sounds good to you, please help kickstart it with a tax-deductible donation today.

Thanks for reading—whether or not you can pitch in today, or ever, I'm glad you're with us.

Signed by Clara Jeffery

Clara Jeffery, Editor-in-Chief

payment methods

We Recommend

Latest