After comparing sites in both oceans, they found the Arctic site to be more acidic, warmer during the summer months, and have fewer nutrients; those disparities account for the differences in vulnerability. The results were published in Nature Science Reports.
The polar oceans are sensitive to increasing global temperature and increasing concentrations of atmospheric carbon dioxide (CO2). The impacts of climate change are expected to be particularly large in ice-covered regions. Up until this project, the Arctic and Southern Oceans remained under-studied at the annual scale compared to other oceans, with the majority of observations restricted to the ice-free summer and autumn seasons.
“Thanks to this research, we now better understand the interplay of various climate and biogeochemical drivers in controlling ocean pH and carbonate saturation state in polar regions," says Dr. Helmuth Thomas. "Climate and biogeochemical conditions make the marine Arctic ecosystem more vulnerable than the Antarctic ecosystem, with potentially severe consequences for peoples living at the Arctic coastline."
The team compared two high-resolution observational data sets of complete annual cycles for sites in the Arctic and Antarctic oceans (Amundsen Gulf and Prydz Bay, respectively). They found that the Arctic site experienced greater seasonal warming (10 vs 3 degrees Celsius), and freshening (by 3 vs 2 salinity units), had lower alkalinity (2220 vs 2320 ìmol/kg), and lower summer pH (8.15 vs 8.5), than the Antarctic site.
The Arctic carbon system showed smaller seasonal changes than the Antarctic system. The team believes excess surface nutrients in the Antarctic may help reduce the extent of ocean acidification in that area and they beleve that the Arctic system may be more vulnerable to anticipated future changes in ocean pH and the carbonate saturation state.
Some carbonate shell forming species play crucial roles in polar foodwebs, and are relevant to human food supply. The team expects changes in pH and the carbonate saturation state to have detrimental effects for carbonate shell forming species and therefore potentially for human food supply. The team expects to see these effects decades earlier in the populated Arctic regions than in the unpopulated Antarctic regions.
Charles Crosby | Newswise
More than 100 years of flooding and erosion in 1 event
28.03.2017 | Geological Society of America
Satellites reveal bird habitat loss in California
28.03.2017 | Duke University
The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
28.03.2017 | Life Sciences
28.03.2017 | Information Technology
28.03.2017 | Physics and Astronomy