Navigation Links
Arctic inland waters emit large amounts of carbon
Date:1/23/2014

Geoscientist Erik Lundin shows in his thesis that streams and lakes of Northern Sweden are hotspots for emissions of carbon dioxide and methane into the atmosphere. Erik defends his findings at Sweden's Ume University on Friday, January 31.

"Especially small streams, which in this study accounted for only about four percent of the investigated water systems, turned out to be particularly important by releasing about ten times as much carbon as lakes," says Erik Lundin. "The reason for this is that streams generally have high concentrations of carbon dioxide, but also because they are turbulent which promotes exchange of gases with the atmosphere."

One of the greatest challenges of our time is to understand the effects of future climate change and its underlying causes. This requires more knowledge of the global carbon cycle, but also how it is affected by a changing climate.

Erik Lundin shows in his study that lakes release a large portion of their carbon dioxide and methane in connection with thaw. It is partly because organic materials that decompose in the lakes in the winter form dissolved carbon dioxide and methane which is then trapped under the ice. When the ice breaks up in the spring these dissolved gases are released, sometimes as quickly as within a few days.

The study also shows that two thirds of catchment carbon loss is through lakes and streams, either through emissions into the atmosphere, but also as dissolved organic and inorganic carbon, which are transported by rivers downstream.

The field study started from the Abisko Scientific Research Station and was conducted in the area around Abisko.

Although the lakes emit carbon into the atmosphere, carbon is also captured and long-term stored in thick layers of sediment at the lake floors through the accumulation of organic material. Erik Lundin made a detailed study on lake emissions relative to the accumulation of carbon by comparing six arctic lakes with literature data.

The results shows that Arctic lakes are more efficient carbon sequestrators than warmer boreal lakes. It indicates that with a warmer climate northern lakes will reduce their coal storage ability and we can expect larger emissions of carbon dioxide and methane from our northernmost lakes.

Although it has long been known that inland waters are atmospheric sources of carbon dioxide and methane, as well as burying carbon in sediments, they are often overlooked in regional carbon budgets. These budgets are estimated to be able to make good estimates of the amount of carbon in various geographical areas, to show existing quantities as well as changes over time.

What is the practical significance of your results?

"It can be concluded that by ignoring the inland waters in regional carbon budgets, one overestimates the landscape carbon sequestration. This knowledge is important when making predictions of the future climate, but also for estimating the climate's feedback effects on the carbon cycle, " says Erik Lundin.


'/>"/>

Contact: Erik Lundin
erik.lundin@emg.umu.se
46-070-516-6137
Umea University
Source:Eurekalert  

Related biology news :

1. Arctic warmth unprecedented in 44,000 years, reveals ancient moss
2. New sea anemone species discovered in Antarctica
3. Arctic cyclones more common than previously thought
4. Ice-loving sea anemones discovered in Antarctica
5. Pilot program to let US high-school students experience Antarctic science at a Chilean station
6. 7 new species of nearctic wasps described and illustrated
7. Virginia Tech research overturns assumption about mercury in the Arctic
8. New DRI project aimed at understanding Mercury dynamics in the Arctic tundra
9. New actors in the Arctic ecosystem
10. UF researchers experiment is first to simulate warming of Arctic permafrost
11. Antarctic fjords are climate-sensitive hotspots of diversity in a rapidly warming region
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Arctic inland waters emit large amounts of carbon
(Date:5/24/2016)... , May 24, 2016 Ampronix facilitates superior patient care by providing ...  3D medical LCD display is the latest premium product recently added to the range ... ... ... Sony 3d Imaging- LCD Medical Display- Ampronix News ...
(Date:5/3/2016)... , May 3, 2016  Neurotechnology, a provider ... MegaMatcher Automated Biometric Identification System (ABIS) , ... multi-biometric projects. MegaMatcher ABIS can process multiple complex ... any combination of fingerprint, face or iris biometrics. ... SDK and MegaMatcher Accelerator , which ...
(Date:4/19/2016)... , UAE, April 20, 2016 ... implemented as a compact web-based "all-in-one" system solution for ... biometric fingerprint reader or the door interface with integration ... modern access control systems. The minimal dimensions of the ... readers into the building installations offer considerable freedom of ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... June 23, 2016 /PRNewswire/ - FACIT has announced ... biotechnology company, Propellon Therapeutics Inc. ("Propellon" ... commercialization of a portfolio of first-in-class WDR5 inhibitors ... such as WDR5 represent an exciting class of ... precision medicine for cancer patients. Substantial advances have ...
(Date:6/23/2016)... 23, 2016 Houston Methodist Willowbrook Hospital ... Sports Association to serve as their official health ... Methodist Willowbrook will provide sponsorship support, athletic training ... association coaches, volunteers, athletes and families. ... Sports Association and to bring Houston Methodist quality ...
(Date:6/23/2016)... Prostate Cancer Foundation (PCF) is pleased to announce 24 new Young Investigator ... Members of the Class of 2016 were selected from a pool of 128 ... About the Class of 2016 PCF Young Investigators ... ... ...
(Date:6/23/2016)... SAN FRANCISCO , June 23, 2016   ... it has secured $1 million in debt financing from ... to ramp up automation and to advance its drug ... for its new facility. "SVB has been ... goes beyond the services a traditional bank would provide," ...
Breaking Biology Technology: