Featured Research

from universities, journals, and other organizations

Frequent, severe fires turn Alaskan forests into a carbon production line

Date:
February 20, 2011
Source:
Michigan Technological University
Summary:
Alaskan forests used to be important players in Mother Nature's game plan for regulating carbon dioxide levels in the air. It's elementary earth science: Trees take up carbon dioxide and give off oxygen. But now, American and Canadian researchers report that climate change is causing wildfires to burn larger swaths of Alaskan trees and to char the groundcover more severely, turning the black spruce forests of Alaska from repositories of carbon to generators of it. And the more carbon dioxide they release, the greater impact that may have in turn on future climate change.

Alaskan forest fires are turning black spruce forests from carbon sinks to carbon sources.
Credit: Michigan Tech

Alaskan forests used to be important players in Mother Nature's game plan for regulating carbon dioxide levels in the air. It's elementary earth science: Trees take up carbon dioxide and give off oxygen.

Related Articles


But now, American and Canadian researchers report that climate change is causing wildfires to burn larger swaths of Alaskan trees and to char the groundcover more severely, turning the black spruce forests of Alaska from repositories of carbon to generators of it. And the more carbon dioxide they release, the greater impact that may have in turn on future climate change.

"Since the proliferation of black spruce, Alaskan soils have acted as huge carbon sinks," says Evan Kane, a research assistant professor in Michigan Technological University's School of Forest Resources and Environmental Science. "But with more frequent and more extensive burning in recent decades, these forests now lose more carbon in any fire event than they have historically been able to take up between fires."

Kane is co-author on a paper published in the January 2011 issue of the journal Nature Geoscience. Lead author on the research study titled "Recent Acceleration of Biomass Burning and Carbon Losses in Alaskan Forests and Peatlands" is Merritt R. Turetsky of the University of Guelph, Ontario.

The overall impact of burning northern forests depends on both the frequency and severity of the fires, the researchers note. A majority of the carbon in these forests is stored in the layers of moss, peat and leaf litter that cover the ground, and those are the layers most likely to burn in forest fires.

This burning not only releases carbon emissions, but the loss of that ground layer affects a number of natural processes, such as regulation of soil climate, maintenance of permafrost and the kinds of trees that can grow back. The new forest types likely to establish after repeated severe fires act as a much weaker carbon sink than black spruce forests.


Story Source:

The above story is based on materials provided by Michigan Technological University. The original article was written by Jennifer Donovan. Note: Materials may be edited for content and length.


Journal Reference:

  1. Merritt R. Turetsky, Evan S. Kane, Jennifer W. Harden, Roger D. Ottmar, Kristen L. Manies, Elizabeth Hoy, Eric S. Kasischke. Recent acceleration of biomass burning and carbon losses in Alaskan forests and peatlands. Nature Geoscience, 2010; 4 (1): 27 DOI: 10.1038/ngeo1027

Cite This Page:

Michigan Technological University. "Frequent, severe fires turn Alaskan forests into a carbon production line." ScienceDaily. ScienceDaily, 20 February 2011. <www.sciencedaily.com/releases/2011/02/110218221921.htm>.
Michigan Technological University. (2011, February 20). Frequent, severe fires turn Alaskan forests into a carbon production line. ScienceDaily. Retrieved February 27, 2015 from www.sciencedaily.com/releases/2011/02/110218221921.htm
Michigan Technological University. "Frequent, severe fires turn Alaskan forests into a carbon production line." ScienceDaily. www.sciencedaily.com/releases/2011/02/110218221921.htm (accessed February 27, 2015).

Share This


More From ScienceDaily



More Earth & Climate News

Friday, February 27, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Winter Storm Means Dangerous Driving in South

Winter Storm Means Dangerous Driving in South

AP (Feb. 26, 2015) A new winter storm is stretching across the south, making travel treacherous throughout the region. (Feb. 26) Video provided by AP
Powered by NewsLook.com
New York City Surrounded by Ice Floes

New York City Surrounded by Ice Floes

AP (Feb. 25, 2015) The freezing temperatures that have plagued much of the eastern U.S. haven&apos;t spared New York City. The waterways around the island of Manhattan are filled with ice. (Feb. 25) Video provided by AP
Powered by NewsLook.com
Raw: Widespread Flooding in Northern Bolivia

Raw: Widespread Flooding in Northern Bolivia

AP (Feb. 25, 2015) Bolivian Vice President Alvaro Garcia surveyed severe flood damage in the northern province of Pando, as people were evacuated from partially submerged houses by boat. (Feb. 25) Video provided by AP
Powered by NewsLook.com
The Amazon Keeps Its Green Thanks To The Sahara Desert

The Amazon Keeps Its Green Thanks To The Sahara Desert

Newsy (Feb. 25, 2015) Satellite data shows the Amazon rainforest supports its lush flora with a little help from Sahara Desert dust. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins