How the Atlantic has become part of a global tour of a rural point – ScienceDaily



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Scientists found this finding when they compared the names of isotope neodymium of deep sea sediment samples from all parts of the Atlantic Ocean. Their paper – & # 39; Great Atlantic devotion to & # 39; preventing relaxation during Paleogene's greenhouse warming – published today in Natural Communications, states that the stronger distribution is combined with elevation in atmosphere CO2 taken to a funeral point. By spreading more heat on the earth's heat, a long-term cold quality came to an end and the world came to a new glasshouse.

Isotope neodymium (Nd) is used as a break of a large amount of water and the mixture. Nd-isotope signature surface water is received from a lot of land around rivers and dust is blown with wind. When surface waters make sink to create a deep shape, they will carrying their special Nd-isotope names with them. How deep water floods through the harbor and its; Combined with other aquaculture, its name Nd-isotope is incorporated into sediments. The deep deep sediments of the archives are valuable for past and harbor recreation.

The story that appears in this document is & # 39; Beginning at the end of Cretaceous (which culminated 66 million years ago), when the world was between two greenhouse states. His / her routine had been & # 39; cooling for tens of millions of years from the main Cretaceous inn-inn, around 90 million years ago. Despite long-term cooling, the temperature and sea level at the end of Cretaceous times was higher than today.

Dr Sietske Batenburg says: & # 39; Our inspection is & # 39; The first one to establish how and when deep connection was created. Over 59 million years ago, the Atlantic Ocean became part of the global earthquake emigration, the stream that connects four of the five main seas.

The Atlantic Ocean was still young, and the North and North Atlantic mills were weaker and more rigorous than today. The central zone gate between South America and Africa did not only allow a tidal, waterproof connection for much of the late Cretaceous time. Active volcanism was created in submerged mountains and in streams that flooded deep water distribution. In the Atlantic Ocean, the Walvis Druim barrier was created above an active volcanic site. This ridge was largely above sea level and created a barrier for a stream of deep water.

As the Atlantic Ocean continued to & # 39; opened, opened the basin rubbish and sank. Cottages became deeper and wider, and ridges under the boat and ridges, along with the crust. At some point, deep water from the South Sea can flow north over Druim Walvis and fill the deeper parts of shells; Atlantic.

Over 59 million years ago, Nd-isotope names from the North and South Atlantic were very similar. This could show that there was one deep water damage, which could be & # 39; coming from the right, passing through the Atlantic Ocean and his / her; fill its text from deep to medium depth. The enhanced deep water exchange, coupled with CO, is getting worse2, which has allowed the spread of more efficient heat over the planet.

This study shows that it is important to recognize a range of geographical and climate responsibilities to understand the location of ocean surroundings in the past greenhouse climate.

The climate of climate change climate with CO2 Human activity releases are far higher than the amount of cooling in the glass windows in the past. If you explore ocean circulation through the latest greenhouse type in the past, you will be able to know how harbor distribution can be developed in the past to the future, and how to spread heat across the globe with seas stream.

This research is the result of international collaboration with Goethe-University Frankfurt; University of Ruprecht-Karls-Heidelberg; GEAMAR Helmholtz Center for Ocean Research Research; The Federal Institute of Geological Studies and Natural Resources in Hannover; University of London Holloway and Oxford University.

The sediments for this study were extracted from long sea drill trees. The International Ocean Research (IODP) Program & # 39; Coordination of scientific trips to locate the seabed debris to restore these sediments, and to store the sediment sediments so that they are available to the entire scientific community.

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Materials supplied by Oxford UniversitySouth Westerly Note: Content can be edited for style and length.

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