Quantcast

Groundbreaking Maps Detail Acidity of the Earth's Oceans

Climate

A team of scientists at Columbia University's Lamont-Doherty Earth Observatory and the University of Colorado at Boulder have published a groundbreaking set of maps that offer a comprehensive picture of the acidity of the Earth's oceans as they absorb climate change-causing carbon emissions, causing changes to marine ecosystems.

In northern winter, the Bering Sea, dividing Alaska and Siberia, becomes the most acidic region on earth (in purple) as shown in this February 2005 acidity map in pH scale. Temperate oceans are less acidic. The equatorial Pacific is left blank due to its high variability around El Niño and La Niña events. Map credit: Taro Takahashi

“We have established a global standard for future changes to be measured,” said Lamont-Doherty geophysicist Taro Takahashi, one of the team that developed the maps, which were published in Marine Chemistry. The maps take a month-by-month look at the increases and declines in ocean acidity in different seasons and locations, as well as  saturation levels of calcium carbonate minerals used by shell-building organisms. They utilize four decades of measurements by Lamont-Doherty researchers and others.

 Among other things, the maps show that the northern Indian Ocean is 10 percent more acidic than the Atlantic and Pacific Oceans, and that ocean water as far north as Iceland and as far south as Antarctica are acidifying by about 5 percent per decade, corresponding to the increase in carbon emissions.

The saturation state of the mineral aragonite, essential to shell-builders, tends to fall as waters become more acidic. The South Pacific Ocean is heavily oversaturated with respect to aragonite (in red) while the polar oceans (in blue) are less saturated, as shown in this February 2005 map. The pink lines represent approximate polar sea ice edges. Map credit: Taro Takahashi

While the chemistry will be over the heads of the average non-chemist, the maps are fascinating for how they make visual the impact we're having on our oceans and what that might mean for cultures and economies that depend on them.

YOU MIGHT ALSO LIKE

Ocean Health Gets 'D' Grade in New Global Index

Ocean Acidification from Climate Change Could Cost $1 Trillion

World Meteorological Organization: Ocean Acidification and Greenhouse Gas Emissions Hit Record Levels

EcoWatch Daily Newsletter

AnnaPustynnikova / iStock / Getty Images

By Kerri-Ann Jennings, MS, RD

Shiitake mushrooms are one of the most popular mushrooms worldwide.

Read More Show Less
Protesters hold a banner and a placard while blocking off the road during a protest against Air pollution in London. Ryan Ashcroft / SOPA Images / LightRocket / Getty Images

By Jessica Corbett

Dozens of students, parents, teachers and professionals joined a Friday protest organized by Extinction Rebellion that temporarily stalled morning rush-hour traffic in London's southeasten borough of Lewisham to push politicians to more boldly address dangerous air pollution across the city.

Read More Show Less
Sponsored

Jose A. Bernat Bacete / Moment / Getty Images

By Bridget Shirvell

On a farm in upstate New York, a cheese brand is turning millions of pounds of food scraps into electricity needed to power its on-site businesses. Founded by eight families, each with their own dairy farms, Craigs Creamery doesn't just produce various types of cheddar, mozzarella, Swiss and Muenster cheeses, sold in chunks, slices, shreds and snack bars; they're also committed to becoming a zero-waste operation.

Read More Show Less
Coal ash has contaminated the Vermilion River in Illinois. Eco-Justice Collaborative / CC BY-SA 2.0

By Jessica A. Knoblauch

Summers in the Midwest are great for outdoor activities like growing your garden or cooling off in one of the area's many lakes and streams. But some waters aren't as clean as they should be.

That's in part because coal companies have long buried toxic waste known as coal ash near many of the Midwest's iconic waterways, including Lake Michigan. Though coal ash dumps can leak harmful chemicals like arsenic and cadmium into nearby waters, regulators have done little to address these toxic sites. As a result, the Midwest is now littered with coal ash dumps, with Illinois containing the most leaking sites in the country.

Read More Show Less

picture-alliance / AP Photo / NOAA Pacific Islands Fisheries Science Center

The Group of 20 major economies agreed a deal to reduce marine pollution at a meeting of their environment ministers on Sunday in Karuizawa, Japan.

Read More Show Less
Sponsored
Pope Francis holds his General Weekly Audience in St. Peter's Square on Aug. 29, 2018 in Vatican City, Vatican. Giulio Origlia / Getty Images

Pope Francis declared a climate emergency Friday as he met with oil industry executives and some of their biggest investors to urge them to act on the climate crisis.

Read More Show Less
A vegetarian bowl with quinoa fritters. Westend61 / Getty Images

By Ketura Persellin

You've likely heard that eating meat and poultry isn't good for your health or the planet. Recent news from Washington may make meat even less palatable: Pork inspections may be taken over by the industry itself, if a Trump administration proposal goes into effect, putting tests for deadly pathogens into the hands of the industry.

Read More Show Less
Florida's Deerfield Beach International Fishing Pier, where the record-breaking beach cleanup took place Saturday. Jeffrey Greenberg / Universal Images Group via Getty Images

More than 600 people gathered on a Florida beach Saturday to break the world record for the largest underwater cleanup of ocean litter.

Read More Show Less