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Microscopic Diamonds Suggest Cosmic Impact Responsible For

Microscopic Diamonds Suggest Cosmic Impact Responsible For Major Period Of Climate Change

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...

Latest Younger Dryas Stories

Notre Patrimoine Polaire***Our Polar Heritage
2014-09-07 03:00:11

Mark Floyd, Oregon State University A new study of three ice cores from Greenland documents the warming of the large ice sheet at the end of the last ice age – resolving a long-standing paradox over when that warming occurred. Large ice sheets covered North America and northern Europe some 20,000 years ago during the coldest part of the ice age, when global average temperatures were about four degrees Celsius (or seven degrees Fahrenheit) colder than during pre-industrial times. And...

Study Questions Younger Dryas Event Comet Theories
2014-05-14 07:31:39

April Flowers for redOrbit.com – Your Universe Online Approximately 128,000 years ago, near the end of the last Ice Age, there was a brief episode of glacial conditions called the Younger Dryas event. The Younger Dryas, named for a flower that flourished during this time, lasted about 1,000 years. There has been quite a bit of controversy in the scientific community regarding what might have initiated the event—with a wide range of theories, including one that has the event caused by...

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...

West Antarctica Deglaciation Began Much Earlier Than Thought
2013-08-15 10:21:16

Lawrence LeBlond for redOrbit.com - Your Universe Online One of the deepest ice cores ever drilled in Antarctica is revealing some interesting evidence about the southern continent’s turbulent past and the role Earth’s orbit played in the history of the ice ages. Scientists have known for more than a century that ice ages come and go due to the wobbling of the Earth as it orbits the sun. Increases in the intensity of summer sunlight in the Northern Hemisphere melted the ice sheets...

What Triggered Earth's Last Big Freeze
2012-11-06 09:53:08

April Flowers for redOrbit.com - Your Universe Online Climate scientists have long debated whether floodwaters from melting of the Laurentide Ice Sheet flowed northwest into the Arctic first, or east via the Gulf of St. Lawrence to weaken ocean thermohaline circulation and have a frigid effect on global climate. This debate concerning the melt, which ushered in the last major cold episode about 12,900 years ago, has been raging for about 30 years. A research team from the University of...

Baffin Island Provides Clues To Glacier Melt
2012-09-14 09:16:08

April Flowers for redOrbit.com - Your Universe Online New research, led by the University at Buffalo, is examining an important mystery surrounding climate change: How quickly do glaciers melt and grow in response to shifts in temperature. According to the study, published in Science, glaciers on Canada's Baffin Island expanded rapidly during a brief cold snap about 8,200 years ago. This discovery adds to a growing body of evidence that shows ice sheets reacted rapidly in the past to...

Greenland Ice Not A Reliable Model For Younger Dryas Period
2012-06-27 10:08:54

Brett Smith for redOrbit.com Ice samples that profile Greenland glaciers have long been used to give climate scientists historical temperature data, but those samples could be misleading, according to a new study published Monday in the Proceedings of the National Academy of Sciences. A team led by University of Wisconsin-Madison researchers found that the data gathered from the ice cores around Greenland varies greatly from other records of Northern Hemisphere temperatures during the...

Image 1 - New Study Supports Theory Of Extraterrestrial Impact
2012-03-06 04:37:04

A 16-member international team of researchers that includes James Kennett, professor of earth science at UC Santa Barbara, has identified a nearly 13,000-year-old layer of thin, dark sediment buried in the floor of Lake Cuitzeo in central Mexico. The sediment layer contains an exotic assemblage of materials, including nanodiamonds, impact spherules, and more, which, according to the researchers, are the result of a cosmic body impacting Earth. These new data are the latest to strongly...

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2010-09-09 08:23:28

New Zealand glaciers melted as European glaciers briefly expanded As the last ice age was ending, about 13,000 years ago, a final blast of cold hit Europe, and for a thousand years or more, it felt like the ice age had returned. But oddly, despite bitter cold winters in the north, Antarctica was heating up. For the two decades since ice core records revealed simultaneous warming and cooling at opposite ends of the planet during this time period, scientists have looked for an explanation....


Word of the Day
grass-comber
  • A landsman who is making his first voyage at sea; a novice who enters naval service from rural life.
According to the OED, a grass-comber is also 'a sailor's term for one who has been a farm-labourer.'