Called the Interior Seaway, it stretched from the Gulf of Mexico to the Arctic. Scientists have thought for years that the water circulation was one long cell, with water moving in a large counter-clockwise circulation.
But now, thanks to research by Boise State geoscientists, that collective thought has been put into question. The study found that the water circulation actually was separated into two cells: one southern circulation, stretching from the Gulf to modern-day Kansas, and a northern circulation, from Kansas to the Arctic.
The results appear online in the journal Nature Geoscience.
“This study unequivocally proves that the southern fauna lived in warmer and saltier water, which led to different animals in that area from the north,” said study coauthor Matthew Kohn, professor of geosciences at Boise State. “The difference in temperature between the two circulations was about seven degrees Fahrenheit, which is a major difference between the two circulations and a major difference for animals.”
Boise State researchers measured the ratio of different masses of oxygen atoms in nearly 100 turtle bones and fish teeth. They found large differences in temperature and salt content between the Gulf of Mexico and Kansas. The researchers said these differences indicate that circulation must have been separated into southern and northern circulation cells, rather than having one long cell stretching from the Gulf to the Arctic.
The researchers said the differences explain why marine animals are so different in the North versus the South.
“This issue is important for understanding climate fundamentals,” Kohn said. “If we can understand how mass, heat and water moved in Earth’s other climate states, especially the warm ones, we might be able to make predictions about future climatic warming and cooling periods.”
The project was funded by the American Chemical Society and the National Science Foundation.Learn More About Research at Boise State University
Matt Pene | Newswise Science News
Oasis of life in the ice-covered central Arctic
24.10.2016 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
Receding glaciers in Bolivia leave communities at risk
20.10.2016 | European Geosciences Union
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
24.10.2016 | Earth Sciences
24.10.2016 | Life Sciences
24.10.2016 | Physics and Astronomy