Featured Research

from universities, journals, and other organizations

First-ever 'State Of The Carbon Cycle Report' Finds Troubling Imbalance

Date:
November 17, 2007
Source:
Carnegie Institution
Summary:
The first "State of the Carbon Cycle Report" for North America finds the continent's carbon budget increasingly overwhelmed by human-caused emissions. North American sources release nearly 2 billion tons of carbon into the atmosphere each year, mostly as carbon dioxide. Carbon "sinks" such as growing forests may remove up to half this amount, but these current sinks may turn into new sources as climate changes.

Carbon sinks may be reaching their limit as forests mature and climate conditions change. And some may literally go up in smoke if wildfires become more frequent, as some climate simulations predict.
Credit: iStockphoto/Tyson Paul

The first "State of the Carbon Cycle Report" for North America, released online this week by the U.S. Climate Change Science Program, finds the continent's carbon budget increasingly overwhelmed by human-caused emissions. North American sources release nearly 2 billion tons of carbon into the atmosphere each year, mostly as carbon dioxide. Carbon "sinks" such as growing forests may remove up to half this amount, but these current sinks may turn into new sources as climate changes.

Related Articles


"By burning fossil fuel and clearing forests human beings have significantly altered the global carbon cycle," says Chris Field of the Carnegie Institution's Department of Global Ecology, one of the report's lead authors. A result has been the buildup of carbon dioxide in the atmosphere, but so far this has been partially offset by carbon uptake by the oceans and by plants and soils on land.

"In effect, we have been getting a huge subsidy from these unmanaged parts of the carbon cycle," notes Field. Overall, this subsidy has sequestered, or hidden from the atmosphere, approximately 200 billion tons of carbon. In North America much of it has come from the regrowth of forests on former farmland and the uptake of carbon by agricultural soils.

But these carbon sinks may be reaching their limit as forests mature and climate conditions change. And some may literally go up in smoke if wildfires become more frequent, as some climate simulations predict. Planting forests and adopting carbon-conserving practices such as no-till agriculture may increase carbon sinks somewhat, but this would not come close to compensating for carbon emissions, which continue to accelerate.

"There are a lot of good reasons for replenishing our forests and encouraging better agricultural practices," says Ken Caldeira, another author of the report, also at Carnegie's Department of Global Ecology. "But if we want to mitigate our impact on the carbon cycle, there's no escaping the fact that we need to drastically reduce carbon dioxide emissions."

The State of the Carbon Cycle (SOCCR) is funded by the Department of Energy (DOE), the National Aeronautical and Space Administration (NASA), the National Oceanic and Atmospheric Administration (NOAA), and the National Science Foundation (NSF).


Story Source:

The above story is based on materials provided by Carnegie Institution. Note: Materials may be edited for content and length.


Cite This Page:

Carnegie Institution. "First-ever 'State Of The Carbon Cycle Report' Finds Troubling Imbalance." ScienceDaily. ScienceDaily, 17 November 2007. <www.sciencedaily.com/releases/2007/11/071114111141.htm>.
Carnegie Institution. (2007, November 17). First-ever 'State Of The Carbon Cycle Report' Finds Troubling Imbalance. ScienceDaily. Retrieved November 24, 2014 from www.sciencedaily.com/releases/2007/11/071114111141.htm
Carnegie Institution. "First-ever 'State Of The Carbon Cycle Report' Finds Troubling Imbalance." ScienceDaily. www.sciencedaily.com/releases/2007/11/071114111141.htm (accessed November 24, 2014).

Share This


More From ScienceDaily



More Earth & Climate News

Monday, November 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola-Hit Sierra Leone's Late Cocoa Leaves Bitter Taste

Ebola-Hit Sierra Leone's Late Cocoa Leaves Bitter Taste

AFP (Nov. 23, 2014) The arable district of Kenema in Sierra Leone -- at the centre of the Ebola outbreak in May -- has been under quarantine for three months as the cocoa harvest comes in. Duration: 01:32 Video provided by AFP
Powered by NewsLook.com
NY Gov. on Flood Prep: 'prepared for the Worst'

NY Gov. on Flood Prep: 'prepared for the Worst'

AP (Nov. 23, 2014) First came the big storm. Now comes the big melt for residents of flood-prone areas around Buffalo. New York's governor says officials are preparing for the worst as the temperature is expected to rise and potentially melt several feet of snow. (Nov. 23) Video provided by AP
Powered by NewsLook.com
Anglerfish Rarely Seen In Its Habitat Will Haunt You

Anglerfish Rarely Seen In Its Habitat Will Haunt You

Newsy (Nov. 22, 2014) For the first time Monterey Bay Aquarium recorded a video of the elusive, creepy and rarely seen anglerfish. Video provided by Newsy
Powered by NewsLook.com
Raw: Buffalo Residents Digging Out, Helping out

Raw: Buffalo Residents Digging Out, Helping out

AP (Nov. 22, 2014) Hundreds of volunteers joined a 'shovel brigade' in Buffalo, New York on Saturday, as the city was living up to its nickname, "The City of Good Neighbors." Video provided by AP
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