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




ICE WORLD
Arctic getting greener
by Staff Writers
Gothenburg, Sweden (SPX) Jun 15, 2012


"We've managed to show that the vegetation changes in our fixed plots are a result of local warming at numerous sites across the world's tundra," Robert Bjork says. Credit: Photo: Ulf Molau och Robert G. Bjork.

Recent years' warming in the Arctic has caused local changes in vegetation, reveals new research by biologists from the University of Gothenburg, Sweden, and elsewhere published in the prestigious journals Nature Climate Change and Ecology Letters. The results show that most plants in the Arctic have grown taller, and the proportion of bare ground has decreased. Above all, there has been an increase in evergreen shrubs.

"We've managed to link the vegetation changes observed at the different sites to the degree of local warming," explains researcher and biologist Robert Bjork from the University of Gothenburg.

Shrubs and plants more widespread
Comparisons show that the prevalence of vascular species, such as shrubs and plants, is increasing as temperatures rise. The degree of change depends on climate zone, soil moisture and the presence of permafrost.

Researchers working on the International Tundra Experiment (ITEX) have been gathering data for almost 30 years. By analysing changes in vegetation in 158 plant communities at 46 locations across the Arctic between 1980 and 2010, they have been able to identify a number of general trends.

"We've managed to show that the vegetation changes in our fixed plots are a result of local warming at numerous sites across the world's tundra," Robert Bjork says.

Summer temperatures and soil moisture implicated
ITEX was started up in the USA in 1990 when agreement was reached on a joint manual with standardised protocols which have since been used throughout the Ar

"The response of different plant groups to rising temperatures often varied with summer ambient temperature, soil moisture content and experimental duration, with shrubs expanding with warming only where the ambient temperature was already high, and grasses expanding mostly in the coldest areas studied," explains Ulf Molau, professor of plant ecology at the University of Gothenburg and for many years a member of the Intergovernmental Panel on Climate Change (IPCC).

Major changes
The results indicate strong regional variation in the response of tundra vegetation to rising temperatures.

"This means that particularly sensitive regions following the combined effects of long-term warming in the Arctic may see much greater changes than we have observed to date," Ulf Molau says.

This is a timely insight now that Sweden, as chair of the Arctic Council in 2011-13, has prime responsibility for producing the Arctic Resilience Report. Experience from ITEX will also be used in the next IPCC assessment report in 2014.

Articles: Nature Climate Change; Ecology Letters

.


Related Links
University of Gothenburg
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
North-East Passage soon free from ice again
Bremerhaven, Germany (SPX) Jun 14, 2012
The North-East Passage, the sea route along the North coast of Russia, is expected to be free of ice early again this summer. The forecast was made by sea ice physicists of the Alfred Wegener Institute for Polar and Marine Research in the Helmholtz Association based on a series of measurement flights over the Laptev Sea, a marginal sea of the Arctic Ocean. Amongs experts the shelf sea is k ... read more


ICE WORLD
Nanoparticles found in moon glass bubbles explain weird lunar soil behaviour

UA Lunar-Mining Team Wins National Contest

NASA Lunar Spacecraft Complete Prime Mission Ahead of Schedule

NASA Offers Guidelines To Protect Historic Sites On The Moon

ICE WORLD
Opportunity Faces Slow Going Due To Communication Issues

Test of Spare Wheel Puts Odyssey on Path to Recovery

Impact atlas catalogs over 635,000 Martian craters

e2v imaging sensors launched into space on NASA mission to Mars

ICE WORLD
Data From Voyager 1 Points To Interstellar Future

The pressure is on for aquanauts

Virgin Galactic Opens New Office

US scientists host 'bake sale for NASA'

ICE WORLD
Time Shifts for Tiangong

China to send its first woman into space on Saturday

China sends its first woman astronaut into space

Major Liu Yang - a Chinese heroine in waiting?

ICE WORLD
Varied Views from the ISS

Strange Geometry - Yes, It's All About the Math

Capillarity in Space - Then and Now, 1962-2012

Dragon on board

ICE WORLD
NASA Administrator Bolden Views Historic SpaceX Dragon Capsule

NASA's NuSTAR Mission Lifts Off

Orbital Launches Company-Built NuSTAR Satellite Aboard Pegasus Rocket for NASA

NuSTAR Arrives at Island Launch Site

ICE WORLD
Extremely little telescope discovers pair of odd planets

Alien Earths Could Form Earlier than Expected

Planets can form around different types of stars

Small Planets Don't Need 'Heavy Metal' Stars to Form

ICE WORLD
Microsoft might talk tablets and TV on Monday

Energy Efficient Dynamic Glass That "Switches On Demand"

Japanese restrict atomic exposure testing

Microsoft reaches into TV market with Xbox Live ads




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