Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Reduced sea ice disturbs balance of greenhouse gases

18.02.2013
The widespread reduction in Arctic sea ice is causing significant changes to the balance of greenhouse gases in the atmosphere. This is shown in a new study conducted by researchers from Lund University in Sweden, among others.
According to the study, the melting of sea ice in the Arctic has a tangible impact on the balance of greenhouse gases in this region, both in terms of uptake and release. The researchers have studied the greenhouse gases carbon dioxide and methane both in the tundra and in the Arctic Ocean.

“Changes in the balance of greenhouse gases can have major consequences because, globally, plants and the oceans absorb around half of the carbon dioxide that humans release into the air through the use of fossil fuels. If the Arctic component of this buffer changes, so will the amount of greenhouse gases in the atmosphere”, says Dr Frans-Jan Parmentier, a researcher at Lund University, Sweden.

He has carried out the research study together with a number of colleagues both from Lund University and from Denmark, Greenland, Canada and the USA. The researchers observed that a vicious circle is formed when the sea ice melts. Normally, the white ice reflects sunlight, which then bounces out into space, but when the sea-ice cover shrinks, the amount of sunlight reflected is also reduced. Instead, a larger proportion is absorbed by the surface of the ocean, which causes warming that contributes to the rise in air temperatures around the Arctic.

On the one hand, the rising temperatures make vegetation grow more vigorously and therefore more carbon dioxide is taken up, which is a positive effect. On the other hand, the same temperature rise means that more carbon dioxide and methane are released from the soil, which has a strong negative impact on the climate, according to Dr Frans-Jan Parmentier.

In addition to the changes on land, the present study shows that there are a number of uncertainties surrounding the effects of the melting ice on the amount of greenhouse gases exchanged by the ocean through natural processes. Many of these marine processes are poorly understood in this context.

“We know very little about how the shrinking sea ice cover disturbs the balance of greenhouse gases in the sea in the long term”, says Dr Parmentier.

For more information, please contact:

Frans-Jan Parmentier
Department of Physical Geography and Ecosystem Science, Lund University
frans-jan.parmentier@nateko.lu.se
tel. +46 723 37 29 54

Torben R. Christensen
Department of Physical Geography and Ecosystem Science, Lund University
torben.christensen@nateko.lu.se
tel. +46 709 56 37 43

Helga Ekdahl Heun | idw
Further information:
http://www.vr.se
http://www.nature.com/nclimate/journal/vaop/ncurrent/full/nclimate1784.html

More articles from Ecology, The Environment and Conservation:

nachricht A new indicator for marine ecosystem changes: the diatom/dinoflagellate index
21.08.2017 | Leibniz-Institut für Ostseeforschung Warnemünde

nachricht Value from wastewater
16.08.2017 | Hochschule Landshut

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

Cholesterol-lowering drugs may fight infectious disease

22.08.2017 | Health and Medicine

Meter-sized single-crystal graphene growth becomes possible

22.08.2017 | Materials Sciences

Repairing damaged hearts with self-healing heart cells

22.08.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>