Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
..
. 24/7 Space News .




ICE WORLD
Arctic Warmth Unprecedented in 44,000 Years
by Staff Writers
London, UK (SPX) Jan 24, 2014


File image - Baffin Island.

When the temperature rises on Baffin Island, in the Canadian high Arctic, ancient Polytrichum mosses, trapped beneath the ice for thousands of years, are exposed. Using radiocarbon dating, new research in Geophysical Research Letters has calculated the age of relic moss samples that have been exposed by modern Arctic warming.

Since the moss samples would have been destroyed by erosion had they been previously exposed, the authors suggest that the temperatures in the Arctic now must be warmer than during any sustained period since the mosses were originally buried.

The authors collected 365 samples of recently exposed biological material from 110 different locations, cutting a 1000 kilometer long transect across Baffin Island, with samples representing a range of altitudes. From their samples the authors obtained 145 viable measurements through radiocarbon dating.

They found that most of their samples date from the past 5000 years, when a period of strong cooling overtook the Arctic. However, the authors also found even older samples which were buried from 24,000 to 44,000 years ago.

The records suggest that in general, the eastern Canadian Arctic is warmer now than in any century in the past 5000 years, and in some places, modern temperatures are unprecedented in at least the past 44,000 years. The observations, the authors suggest, show that modern Arctic warming far exceeds the bounds of historical natural variability.

"The great time these plants have been entombed in ice, and their current exposure, is the first direct evidence that present summer warmth in the Eastern Canadian Arctic now exceeds the peak warmth there in the Early Holocene era", said Gifford Miller, from the University of Colorado.

"Our findings add additional evidence to the growing consensus that anthropogenic emissions of greenhouse gases have now resulted in unprecedented recent summer warmth that is well outside the range of that attributable to natural climate variability."

.


Related Links
Wiley
Beyond the Ice Age






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





ICE WORLD
Polar bear diet changes as sea ice melts
Washington DC (SPX) Jan 23, 2014
A series of papers recently published by scientists at the American Museum of Natural History suggests that polar bears in the warming Arctic are turning to alternate food sources. As Arctic sea ice melts earlier and freezes later each year, polar bears have a limited amount of time to hunt their historically preferred prey-ringed seal pups-and must spend more time on land. The new researc ... read more


ICE WORLD
China's moon rover experiences abnormality

Yutu moon rover has 'abnormality': Xinhua

NASA Seeks Partnership Opportunities For Commercial Lunar Landers

Chang'e-3 probe sets out on new missions

ICE WORLD
NASA Receives Mars 2020 Rover Instrument Proposals for Evaluation

Opportunity at 10: New Findings from Old Rover

Mars 'jelly doughnut' rock intrigues scientists

Mystery Mars rock reveals unexpected chemical composition

ICE WORLD
NASA launches communications satellite

At Your Service: Orion Service Module Complete

Lawrence Livermore 'space cops' to help control traffic in space

NASA's Dryden Flight Research Center to be Renamed for Neil Armstrong

ICE WORLD
Netizens extend blessings to troubled lunar rover

Official: China's space policy open to world

China launches communications satellite for Bolivia

China's moon rover continues lunar survey after photographing lander

ICE WORLD
Israeli astronaut may go to ISS by Russia's Soyuz spacecraft

Cygnus Work Under Way, Normal Station Operations Continue

Spaceflight, Nanoracks Partnership Launch CubeSat Customers Towards Historic ISS Deployment

Orbital's cargo ship arrives at space station

ICE WORLD
45th Space Wing Supports NASA Launch

Athena-Fidus receives its "kick" for Arianespace's upcoming Ariane 5 launch

ILS Proton To Launch Yamal 601

Turkish Telecoms Satellite to Launch From Baikonur Feb. 15

ICE WORLD
ALMA Discovers a Formation Site of a Giant Planetary System

Herschel Telescope Detects Water on Dwarf Planet

Bright star reveals new exoplanet

'Dwarf planet' in deep space has water

ICE WORLD
Google says buys artificial intelligence firm DeepMind

'Gears of War' videogame will stay in Xbox arsenal

MDA awarded key development work for exploration and communications

Lenovo to buy IBM's low-end server business for $2.3bn




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement