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younger dryas impact evidence
2014-09-15 03:30:48

Emily Murphy, University of Chicago Press A new study published in The Journal of Geology provides support for the theory that a cosmic impact event over North America some 13,000 years ago caused a major period of climate change known as the Younger Dryas stadial, or “Big Freeze.” Around 12,800 years ago, a sudden, catastrophic event plunged much of the Earth into a period of cold climatic conditions and drought. This drastic climate change — the Younger Dryas — coincided with...

2014-01-20 10:38:02

The role of the hydrological cycle during abrupt temperature changes is of prime importance for the actual impact of climate change on the continents. In a new study published in Nature Geoscience online (January 19, 2014) scientists from the University of Potsdam, Germany and the GFZ German Research Centre for Geosciences show that during the abrupt cooling at the onset of the so-called Younger Dryas period 12680 years ago changes in the water cycle were the main drivers of widespread...

Large Mammals Of Younger Dryas Wiped Out By Asteroid
2013-09-03 06:40:55

[ Watch the Video: Younger Dryas Impact Wiped Out Large Mammals ] Lawrence LeBlond for redOrbit.com - Your Universe Online Scientists long fascinated with trying to understand a dramatic global climate shift have revealed new evidence that could explain a few things. A new study, funded by the National Science Foundation and to be published online in the Proceedings of the National Academy of Sciences (PNAS) Early Edition, has found that a cataclysmic asteroid or comet impact in the...

2010-04-12 11:25:00

Study suggests that Ice Age climate change did not pose significant challenges to first Americans Paleoindian groups* occupied North America throughout the Younger Dryas interval, which saw a rapid return to glacial conditions approximately 11,000 years ago. Until now, it has been assumed that cooling temperatures and their impact on communities posed significant adaptive challenges to those groups. David Meltzer from the Southern Methodist University in Dallas, USA, and Vance Holliday from...

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2009-12-08 11:25:00

An international team of scientists led by researchers at the University of Hawaii at Manoa have found no evidence supporting an extraterrestrial impact event at the onset of the Younger Dryas ~13000 years ago. The Younger Dryas is an abrupt cooling event in Earth's history. It coincided with the extinction of many large mammals including the woolly mammoth, the saber toothed jaguar and many sloths. This cooling period is generally considered to be the result of the complex global climate...

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2009-11-30 10:42:06

In the film, "ËœThe Day After Tomorrow' the world enters the icy grip of a new glacial period within the space of just a few weeks. Now new research shows that this scenario may not be so far from the truth after all. William Patterson, from the University of Saskatchewan in Canada, and his colleagues have shown that switching off the North Atlantic circulation can force the Northern hemisphere into a mini "Ëœice age' in a matter of months. Previous work has indicated that...

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2009-09-02 14:53:50

Scientists identify 'tipping points' at which sudden shifts to new conditions occur What do abrupt changes in ocean circulation and Earth's climate, shifts in wildlife populations and ecosystems, the global finance market and its system-wide crashes, and asthma attacks and epileptic seizures have in common? According to a paper published this week in the journal Nature, all share generic early-warning signals that indicate a critical threshold of change dead ahead. In the paper, Martin...

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2009-02-17 08:34:57

An article published in the prestigious science magazine Nature Geoscience yesterday shows that the period towards the end of the ice age was engraved by extreme and short-lived variations, which finally terminated the ice age. A group of scientists at the Bjerknes Centre for Climate Research and the University of Bergen in Norway, together with colleagues at ETH, Zrich, combined terrestrial and marine proxy palaeo-data covering the latest part of the ice age to improve our understanding of...

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2008-08-02 13:40:00

Scientists warn the climate can abruptly change, based on data that shows 12,679 years ago a dramatic cooling of the climate happened in Western Europe due to a shift of icy winds over the Atlantic. Researchers looked at annual layers at the bottom of Lake Meerfelder Maar in Germany that showed an abrupt change in sediments consistent with a sudden chill over just one year. They studied pollens, minerals and other matter. "Our data indicate an abrupt increase in storminess during the autumn...


Word of the Day
conjunto
  • A style of popular dance music originating along the border between Texas and Mexico, characterized by the use of accordion, drums, and 12-string bass guitar and traditionally based on polka, waltz, and bolero rhythms.
The word 'conjunto' comes through Spanish, from Latin coniūnctus, past participle of coniungere, to join together; see conjoin