In late February, scientists announced the death of the last of a long-lived ecosystem.
The researchers had been looking for the last time for a record of a group of dead zones, and they’d finally found it: a cluster of dead waters at the bottom of a vast aquifer at the base of a lake in Brazil.
It’s the last known record of this system, and it’s also the first time the system’s existence has been mapped in the Americas.
The group was dubbed the Dead zone, after the famous fictional character from the 1970s TV series The Outer Limits.
“The Dead zone is a kind of ecosystem that’s been around for tens of millions of years,” said Andrew Czerny, an ecologist at the University of Arizona and lead author of the study.
“It’s one of the most active places in the world.”
The Dead Zone, which includes the Amazon, Atlantic and Antarctic coasts, is an ancient system that’s responsible for one-fifth of the global carbon dioxide emissions.
But its demise has been slow-moving.
Researchers were hoping to see it disappear in the next few decades.
Instead, they found that the Deadzone is still going strong, and scientists are continuing to study it.
The Deadzone, which is located at the depths of the Atlantic Ocean, has been an area of concern since the early 1900s.
Its carbon dioxide concentrations were about 50 times higher than the average for the entire world.
The carbon dioxide was causing a rapid decrease in global temperatures, and by the 1930s it was believed to be the dominant greenhouse gas.
But in the late 20th century, scientists realized that a large number of the carbon dioxide in the DeadZone was being absorbed by water that had been trapped under the surface of the planet.
As the oceans sank, the carbon dissolved into the surrounding sediment, creating the Dead zones’ unique, carbon-rich waters.
But as the DeadZones carbon sinks began to decrease, the scientists noticed something strange: the Dead Zones water level began to fall.
That’s when the scientists began to suspect that something was amiss.
“If the Deadzones carbon has been dropping rapidly, then it’s going to have a major effect on the climate,” said co-author Michael Orenstein, a geochemist at the Hebrew University of Jerusalem and co-founder of the Center for Carbon Dioxide and Global Change.
That idea was supported by a new map of the ocean’s Dead zones, published this week by the American Geophysical Union (AGU) and the journal Nature.
“This is one of those areas where we think it’s been going for a very long time,” said Orensteins co-leader Dr. Raul López-Vidal.
“We thought we could trace this over millions of kilometers, and we didn’t expect it to be in the middle of the Amazon basin.”
The map, published in Science, shows how carbon-laden waters are draining into the DeadWorlds shallow waters, which eventually become the DeadSea.
“A lot of the time we’d find a few dead zones with the dead zones of the past, but we didn