From the University of Southern Denmark. This is a bit of a surprise, and may well be true, but I’m not too keen on the first couple of paragraphs. Summer sea ice extent has most surely reduced, winter sea ice the last couple of years has been near normal.
Climate change is a fact, and most of the warming is caused by human activity. The Arctic is now so warm that the extent of sea ice has decreased by about 30 pct. in summer and in winter, sea ice is getting thinner. New research has shown that sea ice removes CO2 from the atmosphere. If Arctic sea ice is reduced, we may therefore be facing an increase of atmospheric concentration of CO2, researchers warn.
Due to global warming, larger and larger areas of sea ice melt in the summer and when sea ice freezes over in the winter it is thinner and more reduced. As the Arctic summers are getting warmer we may see an acceleration of global warming, because reduced sea ice in the Arctic will remove less CO2 from the atmosphere, Danish scientists report. “If our results are representative, then sea ice plays a greater role than expected, and we should take this into account in future global CO2 budgets”, says Dorte Haubjerg Søgaard, PhD Fellow, Nordic Center for Earth Evolution, University of Southern Denmark and the Greenland Institute of Natural Resources, Nuuk.
The biological removal of CO2 is done by algae binding of carbon in organic material.
Frost flowers also contribute
Another important discovery is that every winter flower-like ice formations are formed on the surface of newly formed sea ice. They are called frost flowers. Dorte Haubjerg Søgaard has discovered that these frost flowers hold extremely high concentrations of calcium carbonate, which can have a further significant impact on the potential CO2 uptake in the Arctic.
Photo top: Dorte Haubjerg Søgaard from University of Denmark/Grønlands Naturinstitut studies how sea ice removes CO2 from the atmosphere. Photo: Søren Rysgaard.
Photo below: A frost flower has emerged on new sea ice. Photo: David Barber.
Contact Ph.d. Dorte Haubjerg Søgaard, Tel: +299321200 and email@example.com.
The relative contributions of biological and abiotic processes to carbon dynamics in subarctic sea ice, Polar Biology: Dorte Haubjerg Søgaard, David N. Thomas, Søren Rysgaard, Ronnie Nøhr Glud, Louiza Norman, Hermanni Kaartokallio, Thomas Juul-Pedersen, Nicolas-Xavier Geilfus. doi 10.1007/s00300-013-1396-3.
Ikaite crystal distribution in winter sea ice and implications for CO2 system dynamics, The Cryosphere: S. Rysgaard, D. H. Søgaard, M. Cooper, M. Pućko, K. Lennert, T. N. Papakyriakou, F. Wang, N. X. Geilfus, R. N. Glud, J. Ehn, D. F. McGinnis, K. Attard, J. Sievers, J. W. Deming, and D. Barber. doi:10.5194/tc-7-707-2013.
Frost flowers on young Arctic sea ice, The climatic, chemical and microbial significance of an emerging ice type, Journal of Geophysical Research Atmospheres: D. G. Barber, J. K. Ehn, M. Pućko, S. Rysgaard, J. W. Deming, J. S. Bowman, T. Papakyriakou, R. J. Galley and D. H. Søgaard. doi: 10.1002/2014JD021736.
Autotrophic and heterotrophic activity in Arctic first-year sea ice: seasonal study from Malene Bight, SW Greenland, Marine Ecology: Dorte Haubjerg Søgaard, Morten Kristensen, Søren Rysgaard, Ronnie Nøhr Glud, Per Juel Hansen, Karen Marie Hilligsøe. doi:10.3354/meps08845.