Global warming makes tundra greener

September 15, 2005

Satellite images taken over decades show two seemingly contradictory events that indicate global warming is affecting Alaska.

Thousands of satellite images show Alaskan tundra becoming greener, while also indicating that forests stretching from Alaska's interior into northeast Canada are becoming less green, the Anchorage (Alaska) Daily News reported Thursday.

"Everyone (assumed) these forests were (also) going to continue to green, and it turns out that there may be other factors that are causing unexpected results," Scott Goetz, a senior scientist at Woods Hole Research Center in Massachusetts and one of four scientists analyzing the satellite data told the newspaper.

Alaskan snow researcher Matthew Sturm said some scientists theorize tundra bushes that grow above the snow make the surface darker, accelerating heating by up to 70 percent and, therefore, increasing tundra greening,

Fairbanks ecologist Glenn Juday said the forests are becoming less green because the trees are rapidly drying in the increasing warmth.

The study appears online in the Proceedings of the National Academy of Sciences.

Copyright 2005 by United Press International

Explore further: Climate change has doubled western US forest fires

Related Stories

Climate change has doubled western US forest fires

October 10, 2016

A new study says that human-induced climate change has doubled the area affected by forest fires in the U.S. West over the last 30 years. According to the study, since 1984 heightened temperatures and resulting aridity have ...

Siberian larch forests are still linked to the ice age

June 24, 2016

The Siberian permafrost regions include those areas of the Earth, which heat up very quickly in the course of climate change. Nevertheless, biologists are currently observing only a minimal response in forest composition. ...

Peat and forests save permafrost from melting

September 13, 2007

Permafrost may be buffered against the impacts of climate change by peat and vegetation present in the northern regions, according to a study by McMaster researchers.

Recommended for you

Self-sealing syringe prevents blood loss in hemophilic mice

October 28, 2016

(—For people whose blood does not clot appropriately, such as those with hemophilia, diabetes, or cancer, getting an injection or blood draw with a hypodermic needle is not a trivial matter. Because the needle ...

How Frankenstein saved humankind from probable extinction

October 28, 2016

Frankenstein as we know him, the grotesque monster that was created through a weird science experiment, is actually a nameless Creature created by scientist Victor Frankenstein in Mary Shelley's 1818 novel, "Frankenstein." ...

Making energy-harvesting computers reliable

October 28, 2016

A revolutionary and emerging class of energy-harvesting computer systems require neither a battery nor a power outlet to operate, instead operating by harvesting energy from their environment. While radio waves, solar energy, ...


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.