We report on measurements across an annual cycle of carbon dioxide system parameters in the polar mixed layer (PML) of the circumpolar flaw lead in the Amundsen Gulf, Arctic Ocean. From these and other properties (nitrate, S, T) of the PML, we found that biological processes (photosynthesis and respiration) accounted for about 50% of the monthly variations in the carbonate ion concentration, [CO32−] and Ω, the saturation state of these waters with respect to calcite (ΩCa) and aragonite (ΩAr). Vertical mixing and salinity changes had equal impacts over the annual cycle. The impact of sea ice meltwater resulted in decreasing Ω values in summer, but most of this change was offset by the Ω increase as a result of CO2 drawdown during biological photosynthesis.
Archive for January 2nd, 2012
Impact of biogeochemical processes and environmental factors on the calcium carbonate saturation state in the Circumpolar Flaw Lead in the Amundsen Gulf, Arctic Ocean
Published 2 January 2012 Science Leave a CommentTags: Arctic, chemistry
PhD Position in Biogeochemistry at Leibniz Center for Tropical Marine Ecology (ZMT) GmbH in Bremen, Germany 2012
Study Subject(s):Adaptation strategies of Crustose Coralline Algae (CCA) to ocean acidification
Course Level:PhD
Scholarship Provider: German Federal and State Governments
Scholarship can be taken at: Germany
The EPOCA Project Office (Lina, Anne-Marin and I) wishes all the best for 2012 to all readers of the EPOCA blog! We thank you all for your interest. 2012 will be a transition year for this blog as EPOCA will come to an end in June 2012. Several options will be investigated to make sure that this blog continues; I will keep you posted in due time.
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Jean-Pierre Gattuso
EPOCA Scientific Coordinator
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This blog was started in July 2006 as a “one man” effort. It is a product of EPOCA, the European Project on Ocean Acidification since May 2008 and it is sponsored by the IMBER and SOLAS projects since January 2010. Its only ambition is to centralize information available on ocean acidification and its consequences on marine organisms and ecosystems. By no means it is meant to be comprehensive but we are trying to provide an unbiased view of the literature and media articles. The owner of this blog, the European Commission and the sponsoring organizations do not endorse the information published.
This blog is coordinated by:
Jean-Pierre Gattuso, CNRS Senior Research Scientist
CNRS-Université Pierre et Marie Curie-Paris 6, France
Email: gattuso at obs-vlfr.fr
Web site
Contributors are:
- Jean-Pierre Gattuso, EPOCA coordinator (gattuso at obs-vlfr.fr)
- Lina Hansson, EPOCA Project Manager (hansson at obs-vlfr.fr)
- Anne-Marin Nisumaa, EPOCA Information Technology Manager (nisumaa at obs-vlfr.fr)
