Global warming makes tundra greener

Sep 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: SpaceX close to figuring out rocket failure during launch

Related Stories

Recommended for you

What is the newest planet?

17 hours ago

With astronomers discovering new planets and other celestial objects all the time, you may be wondering what the newest planet to be discovered is. Well, that depends on your frame of reference. If we are ...

Catching Earth at aphelion

17 hours ago

Do you feel a littleā€¦ distant today? The day after the 4th of July weekend brings with it the promise of barbecue leftovers and discount fireworks. It also sees our fair planet at aphelion, or its farthest ...

Opportunity's 7th Mars winter to include new study area

18 hours ago

Operators of NASA's Mars Exploration Rover Opportunity plan to drive the rover into a valley this month where Opportunity will be active through the long-lived rover's seventh Martian winter, examining outcrops ...

User comments : 0

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.