Earth Science News  





. Arctic ice loss: Northwest Passage now open, says space agency

by Staff Writers
Paris (AFP) Sept 14, 2007
The Northwest Passage, the dreamed-of yet historically impassable maritime shortcut between Europe and Asia, has now fully opened up due to record shrinkage of Arctic sea ice, the European Space Agency (ESA) said on Friday.

It released a mosaic of images, taken in early September by a radar aboard its Envisat satellite, which showed that ice retreat in the Arctic had reached record levels since satellite monitoring began in 1978.

"We have seen the ice-covered area drop to just around three million square kilometres (1.158 million square miles), which is about one million square kilometres (386,000 sq. miles) less than the previous minima of 2005 and 2006," said Leif Toudal Pedersen of the Danish National Space Centre.

"There has been a reduction of the ice cover over the last 10 years of about 100 000 sq. km. (38,600 sq. miles) per year on average, so a drop of one million sq. km. (386,000 sq. miles) in just one year is extreme."

The most direct route of the Northwest Passage across northern Canada is "fully navigable", while the so-called Northeast Passage along the Siberian coast "remains only partially blocked," ESA said in a press release.

The previous record low was in 2005 when the Arctic area covered by sea ice was four million sq. km. (1.54 million sq. miles). Even then, the most direct Northwest Passage did not become fully open, ESA said.

On August 10, US Arctic specialist William Chapman of the University of Illinois Champaign-Urbana said that Arctic sea ice cover had already plunged to the lowest levels measured, 30 days before the normal point of the annual minimum.

Scientists under the UN's Intergovernmental Panel on Climate Change (IPCC) have warned that the Arctic is one of the most vulnerable areas for global warming.

In its 4th Assessment Report issued this year, the IPCC predicted the Arctic would be virtually ice-free by mid-2070; other experts believe this could happen as soon as 2040, driven by a phenomenon called albedo.

Albedo is the reflectivity of light. Because sea ice has a bright surface, the majority of solar energy that strikes it is reflected back into space.

When sea ice melts, the dark-coloured ocean surface is exposed. Solar energy is then absorbed by the sea rather than reflected, so the oceans get warmer and temperatures rise, thus making it difficult for new ice to form.

The dramatic loss of sea ice over the past few years has prompted jockeying among countries bordering the Arctic Ocean over navigation routes and the rights to its mineral-rich seabed.

Community
Email This Article
Comment On This Article

Related Links
Beyond the Ice Age




Tempur-Pedic Mattress Comparison

Newsletters :: SpaceDaily Express :: SpaceWar Express :: TerraDaily Express :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News
Antarctic scientific station opens its doors... in Brussels
Brussels (AFP) Sept 5, 2007
Belgian explorer Alain Hubert on Wednesday unveiled a new eco-friendly Antarctic base, aimed at generating greater public interest in the problems posed by global warming.

.
Get Our Free Newsletters Via Email
  



  • When The Levees Fail
  • Japan holds disaster drills to prepare for big quake
  • Devastated New Orleans mourns Katrina dead two years on
  • NKorea searches for fugitives after floods: aid group

  • Climate change and desertification two sides of same coin
  • Slash global meat consumption to tackle climate change: Lancet paper
  • Air pollution causes bigger, more destructive hail
  • Mediterranean's rich marine life under threat: study

  • New Faraway Sensors Warn Of Emerging Hurricane's Strength
  • Key Sensor For Northrop Grumman NPOESS Program Passes Critical Structural Test
  • Air France And ESA Join To Offer Passengers Unique View Of Voyage
  • NASA Scientist Treks To Burning Man Festival

  • SKorea unveils test reactor in search of limitless energy
  • Personalized Greenhouse Effect For Commercial Buildings
  • Phoenix Canada Oil Extends International Patent Filings On Hydrogen Gas Generation Technology
  • Analysis: Nigeria to mimic Saudi Arabia

  • Expert says climate change will spread global disease
  • Northern Iraq battles cholera 'epidemic'
  • Researchers Discover New Strategies For Antibiotic Resistance
  • Yale Scientists Use Nanotechnology To Fight E. Coli

  • Hungry bears plague US west after record drought
  • DNA barcoding: from fruit-flies to puffer fish
  • 'Global extinction crisis' predicted by conservation group
  • Auto Immune Response Creates Barrier To Fertility; Could Be A Step In Speciation

  • Worst pollution sites include India, China: survey
  • Montreal environment forum to hasten HCFC phase-out: UN
  • Indian court says 'asbestos-laden' ship can be broken up
  • Acid Rain Has a Disproportionate Impact on Coastal Waters

  • Toddler And Ape Study Reveals Higher Social Skills Are Distinctly Human
  • Primates Expect Others To Act Rationally
  • Study Identifies Key Player In The Body's Immune Response To Chronic Stress
  • Human Testes May Multiply Mutations

  • The content herein, unless otherwise known to be public domain, are Copyright 1995-2007 - SpaceDaily.AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. 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 SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement