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CU study: Global warming no hoax in the Eastern Canadian Arctic

Oct 23rd

Posted by Channel 1 Networks in CU News

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Average summer temperatures in the Eastern Canadian Arctic during the last 100 years are higher now than during any century in the past 44,000 years and perhaps as long ago as 120,000 years, says a new University of Colorado Boulder study.

The study is the first direct evidence the present warmth in the Eastern Canadian Arctic exceeds the peak warmth there in the Early Holocene, when the amount of the sun’s energy reaching the Northern Hemisphere in summer was roughly 9 percent greater than today, said CU-Boulder geological sciences Professor Gifford Miller, study leader. The Holocene is a geological epoch that began after Earth’s last glacial period ended roughly 11,700 years ago and which continues today.

E Arctic

Miller and his colleagues used dead moss clumps emerging from receding ice caps on Baffin Island as tiny clocks.  At four different ice caps, radiocarbon dates show the mosses had not been exposed to the elements since at least 44,000 to 51,000 years ago.

Since radiocarbon dating is only accurate to about 50,000 years and because Earth’s geological record shows it was in a glaciation stage prior to that time, the indications are that Canadian Arctic temperatures today have not been matched or exceeded for roughly 120,000 years, Miller said.

“The key piece here is just how unprecedented the warming of Arctic Canada is,” said Miller, also a fellow at CU-Boulder’s Institute of Arctic and Alpine Research. “This study really says the warming we are seeing is outside any kind of known natural variability, and it has to be due to increased greenhouse gases in the atmosphere.”

A paper on the subject appeared online Oct. 23 in Geophysical Research Letters, a journal published by the American Geophysical Union. Co-authors include CU-Boulder Senior Research Associate Scott Lehman, former CU-Boulder doctoral student and now Prescott College Professor Kurt Refsnider, University of California Irvine researcher John Southon and University of Wisconsin, Madison Research Associate Yafang Zhong.  The National Science Foundation provided the primary funding for the study.

Miller and his colleagues compiled the age distribution of 145 radiocarbon-dated plants in the highlands of Baffin Island that were exposed by ice recession during the year they were collected by the researchers. All samples collected were within 1 meter of the ice caps, which are generally receding by 2 to 3 meters a year. “The oldest radiocarbon dates were a total shock to me,” said Miller.

Located just east of Greenland, the 196,000-square-mile Baffin Island is the fifth largest island in the world.  Most of it lies above the Arctic Circle. Many of the ice caps on the highlands of Baffin Island rest on relatively flat terrain, usually frozen to their beds. “Where the ice is cold and thin, it doesn’t flow, so the ancient landscape on which they formed is preserved pretty much intact,” said Miller.

To reconstruct the past climate of Baffin Island beyond the limit of radiocarbon dating, Miller and his team used data from ice cores previously retrieved by international teams from the nearby Greenland Ice Sheet.

ARCTIC SUNSET

The ice cores showed that the youngest time interval from which summer temperatures in the Arctic were plausibly as warm as today is about 120,000 years ago, near the end of the last interglacial period. “We suggest this is the most likely age of these samples,” said Miller.

The new study also showed summer temperatures cooled in the Canadian Arctic by about 5 degrees Fahrenheit from roughly 5,000 years ago to about 100 years ago – a period that included the Little Ice Age from 1275 to about 1900.

“Although the Arctic has been warming since about 1900, the most significant warming in the Baffin Island region didn’t really start until the 1970s,” said Miller. “And it is really in the past 20 years that the warming signal from that region has been just stunning. All of Baffin Island is melting, and we expect all of the ice caps to eventually disappear, even if there is no additional warming.”

Temperatures across the Arctic have been rising substantially in recent decades as a result of the buildup of greenhouse gases in Earth’s atmosphere. Studies by CU-Boulder researchers in Greenland indicate temperatures on the ice sheet have climbed 7 degrees Fahrenheit since 1991.

A 2012 study by Miller and colleagues using radiocarbon-dated mosses that emerged from under the Baffin Island ice caps and sediment cores from Iceland suggested that the trigger for the Little Ice Age was likely a combination of exploding tropical volcanoes – which ejected tiny aerosols that reflected sunlight back into space – and a decrease in solar radiation.

-CU-

Eben Fine Park is Open

Oct 23rd

Posted by Channel 1 Networks in Boulder Flood 2013

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Park removed from city manager’s closure list following park cleanup project   The City of Boulder Parks and Recreation Department’s Eben G. Fine Park was removed from the City Manager’s Parks Closure List on Monday, Oct. 21. The park, located at 101 Arapahoe Ave., is open to the public following a two-day volunteer cleanup project at the park last weekend, in which more than 300 volunteers participated.

It may not look quite like this but it's open

It may not look quite like this but it’s open

The city parks and facilities that remain closed under the city manager’s rule include Elks Park, Elmer’s Two-Mile Park, Evert Pierson Memorial Kids’ Fishing Pond, and Knollwood Tennis Courts.   For more information about parks and recreation closures, visit the Parks and Recreation flood recovery, closures, and how to help website.  
–CITY–

 

JonBenet Ramsey

Oct 23rd

Posted by Channel 1 Networks in Jonbenet Ramsey Murder Case

1 comment

JonBenet Ramsey Channel Banner

Boulder Channel 1 page on the Ramsey murder case: JonBenét Ramsey, was murdered here in Boulder December 26, 1996. Boulder Channel 1 staff Jann Scott and others covered the case from the night of the murder. This is a case and a story we know well. Perhaps now with a DA and a police department working together, there may be justice for JonBenet.

News about JonBenet Ramsey Murder Case

Jonbenet Ramsey murdered in Boulder Christmas 1996: Unsolved?

Jonbenet Ramsey murdered in Boulder Christmas 1996: Unsolved?

December 21st, 2014

One celebrated Boulder criminal defense attorney Skip Wollrab told us now that Burke Ramsey is of age"he could be subpoenaed to appear before a Grand jury to tell about what he knew , saw and heard the night of the murder.whatever is not privileged.[READ|SHARE]
Mark Beckner: Fleet White not involved in JonBenets Murder.....mmm---kay

Mark Beckner: Fleet White not involved in JonBenets Murder.....mmm---kay

January 25th, 2014

For the third time in 15 years Boulder Police have repeatedly said Fleet White was not involved in JonBenets murder. Why do they keep bringing up Fleet White then ?? And why now ? Why after reporter Charlie Brennan got the DA to release the Grand Jury findings which say John and Patsy Ramsey did it ?? White was in the house the day of the murder, but why do the police keep going back to him ?? Are they setting a trap?? And for whom? Jon Ramsey ? These are the actions of a trap setter. Why[READ|SHARE]
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Police end silence on JonBenet murder

October 25th, 2013

Boulder Police Chief Mark Beckner and the Grand Jury say John and Patsy Ramsey killed their kid, lied about it and tried to cover it up. Now will they be arrested ??[READ|SHARE]
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Indictments: Parents aided in JonBenet's death

October 25th, 2013

Court documents released Friday show that a Colorado grand jury voted in 1999 to indict the parents of murdered 6-year-old JonBenet Ramsey on charges of child abuse resulting in death and being accessories to a crime.[READ|SHARE]
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JonBenet Ramsey's murder front burner

October 24th, 2013

One of the most notorious unsolved murders in Boulder, not to mention U.S. history, has recently been moved to the front burner, at least for the time being.[READ|SHARE]
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JonBenet Ramsey

October 23rd, 2013

World News 1 Report the JonBenet Ramsey Case was so popular that we created the complete JonBenet Ramsey Channel dedicated to the 10 year old homicide case that still has not been solved, but a suspect has recently admitted to the murder saying it was an accident. But does his story and what actually happened match up or is he just a sick child molester.[READ|SHARE]
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Visionary says Photographer killed Jon Benet Ramsey

July 16th, 2011

While off of work one afternoon, I had woke up from bed and proceeded toward the hallway to the restroom,when suddenly at the bottom of the stairs stood Jon Benet Ramsey. She had a camera strapped around her neck as in the vision at John Llley Correctional Center and said to me three times; "the photographer did it". And then she vanished. This premonition occurred a few more times thereafter.[READ|SHARE]
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JonBenet Ramsey News

October 24th, 2010

Breaking news on the Jonbenet Ramsey case. A suspect and former schoolteacher was arrested in Bangkok in the death of JonBenet Ramsey, the 6-year-old beauty pageant princess who was found strangled in her home on Dec. 26, 1996. World News revisits the case from the actual doorsteps of JonBenets' home in Boulder Colorado.[READ|SHARE]

News about JonBenet Ramsey Murder Case

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