Representatives of the research community and the political sphere took advantage of the short stop in the port to share experiences and ideas and intensify the good cooperation within the framework of a reception on board.
On 29 January the Polarstern will sail with a new crew as well as new scientific and technical personnel back to Punta Arenas. From the eastern Ross Sea and along the continental margin off Marie Byrd Land geophysical profiling will connect the existing data grid of the Ross Sea to the profiles in the Amundsen Sea and Bellingshausen Sea. The researchers headed by Chief Scientist Dr. Karsten Gohl from the Alfred Wegener Institute for Polar and Marine Research in the Helmholtz Association want to close the currently existing large gap in data. The objective of this work is to determine the topography of the seafloor at present and in the geological past and thus create a basis for long-term climate simulations. The main area of work will subsequently be Pine Island Bay, known for the recently accelerated retreat of the Pine Island and Thwaites Glacier systems. Reconstruction of the dynamic changes in the West Antarctic ice sheet is aimed at providing a better understanding of the current changes and their possible influence on an increased sea level rise. This aim constitutes the focus of the geophysical and geological investigations. Geothermal heat-flow measurements are expected to provide insight into recent volcanic activities that may have an impact on ice-sheet dynamics. Oceanographic measurements will help in explaining one of the possible causes of the present retreat of the glaciers.
The 43 members of the team involved in the expedition that just ended was headed by geologist Dr. Rainer Gersonde from the Alfred Wegener Institute. They collected 1000 metres of sediment cores altogether (around eleven tons in weight) at 70 stations during the research cruise from Chile to New Zealand that covered 9400 nautical miles (17,000 km). The unique material will furnish for the first time detailed information on the climate history of the last 400,000 to 4 million years in this region, which has been subject to little research up to now, though it is important for climate development. Scientists from six nations, including New Zealand, will jointly examine the evolution of the Antarctic Circumpolar Current, the spread of sea ice and its influence on variations in greenhouse gas concentrations as well as melting events in the West Antarctic ice sheet and their impact on global ocean circulation using state-of-the-art methods. Another objective is to determine climate-impacting interactions between the polar South Pacific, the tropical and northern polar regions during past cold and warm periods.
Such questions relevant to the climate are also the focus of a planned deep-sea drilling project within the framework of the Integrated Ocean Drilling Program (IODP) in the Antarctic Pacific. The two ongoing expedition phases will provide the database for selecting the IODP drilling sites. Researchers from all over the world want to look as far as 40 million years back into the geological past with the deep-sea sediments to be drilled in the future.
In addition to geologists and geophysicists, biologists, chemists, oceanographers and scientists of numerous other disciplines also make regular use of the research icebreaker for their studies. This is the 50th expedition with about 200 legs altogether and a good example of the multidisciplinary approach applied on the Polarstern, which has been sailing across the Arctic, Antarctic and oceans of the mid latitudes since 1982. It provides a platform for scientists of the Alfred Wegener Institute and their cooperation partners and contributes to unravelling the complex interrelationships in the Earth system. The primary objective of the research is to understand the driving forces and fluctuations in climate cycles.
The Alfred Wegener Institute conducts research in the Arctic, Antarctic and oceans of the high and mid latitudes. It coordinates polar research in Germany and provides major infrastructure to the international scientific community, such as the research icebreaker Polarstern and stations in the Arctic and Antarctic. The Alfred Wegener Institute is one of the sixteen research centres of the Helmholtz Association, the largest scientific organisation in Germany.
Margarete Pauls | idw
Diving robots find Antarctic seas exhale surprising amounts of carbon dioxide in winter
16.08.2018 | National Science Foundation
Diving robots find Antarctic winter seas exhale surprising amounts of carbon dioxide
15.08.2018 | University of Washington
There are currently great hopes for solid-state batteries. They contain no liquid parts that could leak or catch fire. For this reason, they do not require cooling and are considered to be much safer, more reliable, and longer lasting than traditional lithium-ion batteries. Jülich scientists have now introduced a new concept that allows currents up to ten times greater during charging and discharging than previously described in the literature. The improvement was achieved by a “clever” choice of materials with a focus on consistently good compatibility. All components were made from phosphate compounds, which are well matched both chemically and mechanically.
The low current is considered one of the biggest hurdles in the development of solid-state batteries. It is the reason why the batteries take a relatively long...
New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference
Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
17.08.2018 | Event News
08.08.2018 | Event News
27.07.2018 | Event News
20.08.2018 | Information Technology
20.08.2018 | Life Sciences
20.08.2018 | Information Technology