Scientists from nine nations have set sail for the Integrated Ocean Drilling Program (IODP) Tahiti Sea Level Expedition, a research expedition initiated to investigate global sea level rise since the last glacial maximum, approximately 23,000 years ago. For six weeks, aboard the DP HUNTER, the expedition science party will work on the most extensive geological research investigation ever undertaken in a coral reef area. Off the coast of Tahiti, IODP scientists will take samples of fossil corals from the ocean seafloor to analyze the environmental records that are inside them. Scientists expect the coral reefs to yield records on changes in sea surface temperature during the circumscribed period and information on climatic anomalies, including El Niño/Southern Oscillation events.
Through this research expedition, IODP scientists aim to learn more about the timing and course of past global sea level changes to better understand present and future sea level rise due to global greenhouse conditions. Since the climax of the last ice age, global sea level has risen by about 120 meters, primarily because of the melting of large inland ice sheets and thermal expansion of the global body of ocean waterattributable to rising temperatures.
According to IODP scientists, Tahiti is well situated for these investigations because the island is located in a tectonically stable region. Consequently, changes in sea level here can be related solely to global effects. Because the corals off Tahiti have strict ecological requirements and are extremely sensitive to environmental changes, both natural and human-induced, they are accurate, sensitive recorders of past sea level and climatic change.
Less radiation in inner Van Allen belt than previously believed
21.03.2017 | DOE/Los Alamos National Laboratory
Mars volcano, Earth's dinosaurs went extinct about the same time
21.03.2017 | NASA/Goddard Space Flight Center
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...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
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22.03.2017 | Materials Sciences