News / Science & Technology

Study: Arctic Temperatures Highest in 44,000 Years

Professor Gifford Miller is shown here collecting dead plant samples from beneath a Baffin Island ice cap. (Photo courtesy Gifford Miller, University of Colorado Boulder)
Professor Gifford Miller is shown here collecting dead plant samples from beneath a Baffin Island ice cap. (Photo courtesy Gifford Miller, University of Colorado Boulder)

Related Articles

Video As North Pole Ice Melts, More Ships Take Arctic Shortcut

Activists worry about environmental risks, but analysts say route is good for China-Europe shipping
VOA News
Average summer temperatures in the eastern Canadian Arctic are higher than they have been in at least the past 44,000 years and perhaps higher than at any time in the past 120,000 years, according to a new study.

Researchers at the University of Colorado, Boulder say the warmth there exceeds that of the Early Holocene era, when the amount of the sun’s energy reaching the Northern Hemisphere in summer was roughly 9 percent greater than today.

“The key piece here is just how unprecedented the warming of Arctic Canada is,” said professor Gifford Miller, a fellow at CU-Boulder’s Institute of Arctic and Alpine Research who led the study. “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.”

Miller and his colleagues used dead moss clumps emerging from melting ice caps on Baffin Island as tiny calendars. 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 researchers 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 west of Greenland, the 315,999-square-kilometer 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,” Miller added.

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

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.”

A paper on the subject appeared online Oct. 23 in Geophysical Research Letters, a journal published by the American Geophysical Union.

You May Like

New England Bears Brunt of US Blizzard

Boston, surrounding region grapple with as much as 3 feet of snow, coastal flooding; leaders in New York, spared most severe weather, criticized for being overly cautious More

China Lifts Lid on Sale of Fake Goods Online

A recent survey found nearly 60 percent of a random sample of items bought from Taobao were fake More

Upward Aims to Create Old-girls Network in Silicon Valley

Lisa Lambert, an executive with Intel Corp.'s venture-capital unit, responds to the gender-disparity debate by creating a new social organization More

This forum has been closed.
Comment Sorting
Comments
     
by: Hoax from: Global
October 25, 2013 1:02 PM
The same secretive organization that admittedly manufactured the global warming threat in 1990 is still pushing the same hoax today, with the Club of Rome issuing an alarmist report predicting a catastrophic rise in temperatures that will decimate the planet. “Rising carbon dioxide emissions will cause a global average temperature rise of 2 degrees Celsius by 2052 and a 2.8 degree rise by 2080, as governments and markets are unlikely to do enough against climate change, the Club of Rome think tank said,” reports Reuters.

The report, entitled, 2052: A Global Forecast for the Next Forty Years, decries improving living standards in developing countries and warns that man-made climate change could eventually kill off humans entirely. Although the report has generated a deluge of coverage in the establishment media, not one of those news stories points out that the Club of Rome admittedly manufactured the “idea” of man-made global warming back in 1990.
On page 75 of their 1990 publication entitled The First Global Revolution, the organization outlined how they would manufacture ecological scares in order to manipulate the public into accepting the imposition of a dictatorial world government run by them.

“In searching for a common enemy against whom we can unite, we came up with the idea that pollution, the threat of global warming, water shortages, famine and the like would fit the bill…. All these dangers are caused by human intervention… The real enemy, then, is humanity itself,” states the report.


by: will from: chicago
October 25, 2013 11:28 AM
Who was there 44000 years ago, Take away the money and the bumbs will have to get real jobs.

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
NASA Monitors Earth’s Vital Signs From Spacei
X
Rosanne Skirble
January 27, 2015 5:05 PM
The U.S. space agency, NASA, is wrapping up its busiest 12-month period in more than a decade, with three missions launched in 2014 and two this month, one in early January and the fifth scheduled for January 29. As VOA’s Rosanne Skirble reports, the instruments being lifted into orbit are focused on Earth’s vital life support systems and how they are responding to a warmer planet.
Video

Video NASA Monitors Earth’s Vital Signs From Space

The U.S. space agency, NASA, is wrapping up its busiest 12-month period in more than a decade, with three missions launched in 2014 and two this month, one in early January and the fifth scheduled for January 29. As VOA’s Rosanne Skirble reports, the instruments being lifted into orbit are focused on Earth’s vital life support systems and how they are responding to a warmer planet.
Video

Video Saved By a Mistake - an Auschwitz Survivor's Story

Dagmar Lieblova was 14 when she arrived at Auschwitz in December 1943, along with her entire Czech Jewish family. All of them were to die there, but she was able to leave after several months due to a bureaucratic mix-up which saved her life. Now 85, with three children and six grandchildren, she says she has a feeling of victory. This report by Ahmad Wadiei and Farin Assemi, of RFE/RL's Radio Farda is narrated by RFE’s Raymond Furlong.
Video

Video Weekly Protests in Korea Keep Japanese WWII Atrocities Alive

Every week in Seoul protesters gather in front of the Japanese Embassy to demand an apology and reparations from Tokyo for the thousands of South Korean women who were forced into prostitution during World War II. Although this year marks the 70th anniversary of the end of the war, these protestors have helped keep the issue of comfort women alive and made it difficult for Japan to move beyond its past wartime atrocities. VOA's Brian Padden reports from Seoul.
Video

Video Exercise: New Prescription for Parkinsons Disease

Exercise could be the new prescription for Parkinson's Disease, a progressive disorder of the nervous system that affects movement. More than six million people worldwide suffer from Parkinsons and they're traditionally treated with medication and surgery. Shelley Schlender has more.
Video

Video Brussels Shaken as New Greek Leader Challenges Europe’s Austerity Drive

Greece’s youngest-ever prime minister, 40-year-old Alexis Tsipras, was sworn in Monday after his victorious far-left Syriza party entered a coalition with far right rivals. Tsipras says he will restore dignity to Greece by ending spending cuts. So begins a new chapter for the country at the epicenter of Europe’s economic crisis - a change that has sent tremors across the continent, as Henry Ridgwell reports from London.
Video

Video Obama Urges Closer Economic Ties During Historic India Visit

U.S. President Barack Obama says the United States and India must do better to capitalize on untapped potential in their economic relationship - by removing some of the roadblocks to greater trade and investment. As VOA correspondent Aru Pande reports from New Delhi, Obama spoke after participating in India’s Republic Day celebration.
Video

Video White House Grapples With Yemen Counterterrorism Strategy

Reports say the U.S. has carried out a drone strike on suspected militants in Yemen, the first after President Barack Obama offered reassurances the U.S. is continuing its counterterrorism operations in the country. The future of those operations has been in question following the collapse last week of Yemen’s government. VOA White House correspondent Luis Ramirez reports.
Video

Video Worldwide Photo Workshops Empower Youth

Last September, 20 young adults from South Sudan took part in a National Geographic Photo Camp. They are among hundreds of students from around the world who have learned how to use a camera to tell the stories of the people in their communities through the powerful medium of photography. Three camp participants talked about their experiences recently on a visit to Washington. VOA’s Julie Taboh reports.
Video

Video US, Japan Offer Lessons as Eurozone Launches Huge Stimulus

The Euro currency has fallen sharply after the European Central Bank announced a bigger-than-expected $67 billion-a-month quantitative easing program Thursday - commonly seen as a form of printing new money. Henry Ridgwell reports for VOA from London on whether the move might rescue the eurozone economy -- and what lessons have been learned from similar programs around the world.
Video

Video Oil Price Drop Troubles Texas Producers

As oil prices have fallen over the past several months, drilling operations have slowed in some parts of the United States - including Texas, the state that surpasses all others in energy production. The Lone Star State’s energy output has been boosted in recent years by development of resources trapped deep below ground in the Eagle Ford shale deposit, which stretches across south central Texas. As VOA’s Greg Flakus reports from Karnes City, Texas, the drop in oil prices has created concerns,
Video

Video Nigerian Elections Pose Concern of Potential Conflict in 'Middle Belt'

Nigeria’s north-central state of Kaduna has long been the site of fighting between Muslims and Christians as well as between people of different ethnic groups. As the February elections approach, community and religious leaders are making plans they hope will keep the streets calm after results are announced. Chris Stein reports from the state capital, Kaduna.
Video

Video As Viewership Drops, Obama Puts His Message on YouTube

Ratings reports show President Obama’s State of the Union address this week drew the lowest number of viewers for this annual speech in 15 years. White House officials anticipated this, and the president has decided to take a non-traditional approach to getting his message out. VOA White House correspondent Luis Ramirez reports.

Circumventing Censorship

An Internet Primer for Healthy Web Habits

As surveillance and censoring technologies advance, so, too, do new tools for your computer or mobile device that help protect your privacy and break through Internet censorship.
More

All About America

AppleAndroid