Remotely Operated Vehicle “ROV KIEL 6000“

The remotely operated vehicle ROV KIEL 6000 is a deep diving platform rated for water depths of 6000 meters. It is linked to a surface vessel via an umbilical cable transmitting power (copper wires) and data (3 single-mode glass fibers). As standard it comes equipped with still and video cameras and two different manipulators providing eyes and hands in the deep. Besides this a set of other tools may be added depending on the mission tasks, ranging from simple manipulative tools such as chisels and shovels to electrically connected instruments which can send in-situ data to the ship through the ROVs network, allowing immediate decisions upon manipulation or sampling strategies

Remotely Operated Vehicle “ROV PHOCA“

The remotely operated vehicle ROV PHOCA is a deep diving platform rated for water depths of 3000 meters. The ROV is linked to a surface vessel via an umbilical cable transmitting power (copper wires) and data (3 single-mode glass bers). As standard it comes equipped with still and video cameras and two dierent manipulators providing eyes and hands in the deep. Special emphasis was put on the compatibility of numerous systems with the existing ROV KIEL 6000 to facilitate the use of both systems on various research vessels with a given team of ROV pilots.Besides this, a set of other tools may be added depending on the mission tasks, ranging from simple manipulative tools as chisels and shovels to electrically connected instruments which can send insitu data to the ship through the ROVs network, allowing immediate decisions upon manipulation or sampling strategies

Clara Immerwahr: A Life in the Shadow of Fritz Haber

We examine the life of Clara Haber, nee Immerwahr (1870–1915), including her tragic suicide and its possible relation to the involvement of her husband, Fritz Haber, in chemical warfare. Clara earned a doctorate in chemistry from the University of Breslau, in 1900, as the first woman ever, and married the physical chemist Fritz Haber within a year of her graduation. With no employment available for female scientists, Clara freelanced as an instructor in the continued education of women, mainly housewives, while struggling not to become a housewife herself. Her duties as the designated head of a posh household hardly brought fulfillment to her life. The outbreak of WWI further exacerbated the situation, as Fritz Haber applied himself in extraordinary ways to aid the German war effort, which included his initiative to develop chemical weapons. The night that he celebrated the “success” of the first chlorine cloud attack and his promotion to the rank of captain, Clara committed suicide. However, we found little evidence to support express claims that Clara was an outspoken pacifist who took her life because of her disapproval of her husband’s engagement in chemical warfare. We examine the origin of this “myth of Clara Immerwahr” that took root in the 1990s from the perspective offered by the available scholarly sources, including those that have only recently come to light

Report and preliminary results of R/V SONNE Cruise SO251 - Extreme events Archived in the GEologial Record of JAPAN's subduction margins (EAGER-JAPAN)

Leg A SO251-1, Yokohama - Yokohama, 04.10.2016 - 15.10.2016, Leg B SO251-2, Yokohama - Yokohama, 18.10.2016 - 02.11.201

Augen und Hände in der Tiefe - Forschungsroboter, Tauchboot und weitere Forschungsgeräte des IFM-GEOMAR

Die Oberfläche des Mondes ist besser untersucht als unsere Ozeane‘ ein häufig genutztes Zitat zeigt den großen Wissensrückstand der Menschheit über den größten Lebensraum auf der Erde, den Ozean. Am IFM-GEOMAR werden für die detaillierte Untersuchung des Meeresbodens verschiedene Geräte wie autonome Fahrzeuge, ein bemanntes Tauchboot und Tauchroboter wie das ROV KIEL 6000 eingesetzt. Das ROV KIEL 6000 ist ein großes, elektrisch betriebenes Work Class ROV (Arbeitstauchroboter, ROV= Remotely Operated Vehicle). Der Roboter taucht, von einem Forschungsschiff aus eingesetzt, ferngesteuert bis zu einer maximalen Tauchtiefe von 6000m selber hinab. Am Meeresboden werden, aus dem Kontrollcontainer gesteuert, wissenschaftliche Experimente ausgeführt, Geräte abgesetzt oder mit verschiedenen Hilfsmitteln Proben vom Meeresboden entnommen. Der Vortrag wird sich auf die Tauchroboter konzentrieren und neben der Beschreibung der Technik Bilder aus den verschiedenen Einsatzgebieten und ausgewählte filmische Beispiele der Arbeit am Meeresboden zeigen

The acoustic turbid layer in muddy sediments of Eckernfoerde Bay, Western Baltic: methane concentration, saturation and bubble characteristics

In Eckernfoerde Bay in the western Baltic, an enclosed basin with organic-rich mud, acoustic turbidity has been observed since 1952. To investigate the relationships between acoustic properties and free gas we developed a method for rapid sub-sampling of gravity cores to determine the total methane content. From temperature measurements, determinations of the salinity of the pore water and data from the literature, saturation limits were calculated for each core. It is demonstrated that there is a certain amount of free gas in the mud of Eckernfoerde Bay but subbottom depths of the oversaturation and of the acoustic turbidity do not correspond. The existence of free gas implies the existence of bubbles in the sediment which are regarded to be responsible for the acoustic turbidity. Bubble sizes observed by X-ray computed tomography while still under in situ pressure and temperature vary between 1 and 10 mm equivalent diameter. The distribution of bubbles is discontinuous, occurring in depth zones from 2 to 20 cm thickness