Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Study Answers How Ancient Waterway Circulated

16.11.2011
A Boise State University study has shed new light on how a shallow seaway that once extended across the central part of North America circulated during one of earth’s warmest periods, about 82 to 87 million years ago. The findings could help explain why animals differ in the North and South regions.

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
An emerging metropolitan research university of distinction, Boise State University has launched a new website – beyondtheblue.boisestate.edu – to showcase the research expertise and innovative spirit that exists in many fields at the university. Known for its unique blue turf and nationally ranked football program, Boise State is demonstrating its creativity beyond the blue in an ongoing series of faculty podcasts where faculty experts provide insight into today’s issues, challenges and topics of interest.

Matt Pene | Newswise Science News
Further information:
http://www.boisestate.edu

More articles from Earth Sciences:

nachricht How much biomass grows in the savannah?
16.02.2017 | Friedrich-Schiller-Universität Jena

nachricht Canadian glaciers now major contributor to sea level change, UCI study shows
15.02.2017 | University of California - Irvine

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Biocompatible 3-D tracking system has potential to improve robot-assisted surgery

17.02.2017 | Medical Engineering

Real-time MRI analysis powered by supercomputers

17.02.2017 | Medical Engineering

Antibiotic effective against drug-resistant bacteria in pediatric skin infections

17.02.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>