Quantcast
Environmental News for a Healthier Planet and Life

Help Support EcoWatch

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

Pexels

By Shawna Foo

Anyone who's tending a garden right now knows what extreme heat can do to plants. Heat is also a concern for an important form of underwater gardening: growing corals and "outplanting," or transplanting them to restore damaged reefs.

Read More Show Less
Malte Mueller / Getty Images

By David Korten

Our present course puts humans on track to be among the species that expire in Earth's ongoing sixth mass extinction. In my conversations with thoughtful people, I am finding increasing acceptance of this horrific premise.

Read More Show Less
Women sort potatoes in the Andes Mountains near Cusco Peru on July 7, 2014. Thomas O'Neill / NurPhoto / Getty Images

By Alejandro Argumedo

August 9 is the International Day of the World's Indigenous Peoples – a celebration of the uniqueness of the traditions of Quechua, Huli, Zapotec, and thousands of other cultures, but also of the universality of potatoes, bananas, beans, and the rest of the foods that nourish the world. These crops did not arise out of thin air. They were domesticated over thousands of years, and continue to be nurtured, by Indigenous people. On this day we give thanks to these cultures for the diversity of our food.

Read More Show Less
A sand tiger shark swims over the USS Tarpon in Monitor National Marine Sanctuary. Tane Casserley / NOAA

By John R. Platt

Here at The Revelator, we love a good shark story.

The problem is, there aren't all that many good shark stories. According to recent research, sharks and their relatives represent one of the world's most imperiled groups of species. Of the more than 1,250 known species of sharks, skates, rays and chimeras — collectively known as chondrichthyan fishes — at least a quarter are threatened with extinction.

Read More Show Less
The Anderson Community Group. Left to right, Caroline Laur, Anita Foust, the Rev. Bryon Shoffner, and Bill Compton, came together to fight for environmental justice in their community. Anderson Community Group

By Isabella Garcia

On Thanksgiving Day 2019, right after Caroline Laur had finished giving thanks for her home, a neighbor at church told her that a company had submitted permit requests to build an asphalt plant in their community. The plans indicated the plant would be 250 feet from Laur's backdoor.

Read More Show Less
Berber woman cooks traditional flatbread using an earthen oven in her mud-walled village home located near the historic village of Ait Benhaddou in Morocco, Africa on Jan. 4, 2016. Creative Touch Imaging Ltd. /NurPhoto / Getty Images

By Danielle Nierenberg and Jason Flatt

The world's Indigenous Peoples face severe and disproportionate rates of food insecurity. While Indigenous Peoples comprise 5 percent of the world's population, they account for 15 percent of the world's poor, according to the World Health Organization.

Read More Show Less

Trending

Danny Choo / CC BY-SA 2.0

By Olivia Sullivan

One of the many unfortunate outcomes of the coronavirus pandemic has been the quick and obvious increase in single-use plastic products. After COVID-19 arrived in the United States, many grocery stores prohibited customers from using reusable bags, coffee shops banned reusable mugs, and takeout food with plastic forks and knives became the new normal.

Read More Show Less