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New and compiled palaeomagnetic data from western Ross Sea (Antarctica) spanning the last ca. 10 ka

This dataset includes both original and previously published paleomagnetic data. The new data refer to a marine sediment sequence (ANTA02-AV43 core) collected in the in Wood Bay, located along the coast of Victoria Land, within the western Ross Sea (Antarctica) and spanning the last ca. 10 ka. The formerly published paleomagnetic data from coeval sediment cores refer to the from the RS15‐GC57 core of Truax et al. (2025) collected in the adjacent Robertson Bay, and from the PC18 and PC19 cores of Macrì et al. (2005), recovered from the continental rise of the Wilkes Land basin offshore the coast of East Antarctica. The data from these two latter cores were relocated to the location of the ANTA02-AV43 core with the Noel and Batt (1990) method. The estimated age of the formerly published dataset has been re-evaluated after correlation of paleomagnetic trends with the ANTA02-AV43 core and prediction of geomagnetic variation at the ANTA02-AV43 site according to the CALS10k.2 model of Constable et al. (2016). We then combined the new ANTA02-AV43 dataset with existing Holocene records from sediment cores of comparable resolution (PC18 and PC19) to develop the paleomagnetic “HOLOANTA” stack. This composite record averages paleomagnetic data over the last 10,000 years in 200-year intervals. It includes relative paleointensity (RPI) as well as paleomagnetic inclination and declination data, providing a robust regional Holocene RPI curve alongside directional secular variation (PSV) trends.

Ecotoxicology of Organotin compounds

Organotin and especially butyltin compounds are used for a variety of applications, e.g. as biocides, stabilizers, catalysts and intermediates in chemical syntheses. Tributyltin (TBT) compounds exhibit the greatest toxicity of all organotins and have even been characterized as one of the most toxic groups of xenobiotics ever produced and deliberately introduced into the environment. TBT is not only used as an active biocidal compound in antifouling paints, which are designed to prevent marine and freshwater biota from settlement on ship hulls, harbour and offshore installations, but also as a biocide in wood preservatives, textiles, dispersion paints and agricultural pesticides. Additionally, it occurs as a by-product of mono- (MBT) and dibutyltin (DBT) compounds, which are used as UV stabilizer in many plastics and for other applications. Triphenyltin (TPT) compounds are also used as the active biocide in antifouling paints outside Europe and furthermore as an agricultural fungicide since the early 1960s to combat a range of fungal diseases in various crops, particularly potato blight, leaf spot and powdery mildew on sugar beet, peanuts and celery, other fungi on hop, brown rust on beans, grey moulds on onions, rice blast and coffee leaf rust. Although the use of TBT and TPT was regulated in many countries world-wide from restrictions for certain applications to a total ban, these compounds are still present in the environment. In the early 1970s the impact of TBT on nontarget organisms became apparent. Among the broad variety of malformations caused by TBT in aquatic animals, molluscs have been found to be an extremely sensitive group of invertebrates and no other pathological condition produced by TBT at relative low concentrations rivals that of the imposex phenomenon in prosobranch gastropods speaking in terms of sensitivity. TBT induces imposex in marine prosobranchs at concentrations as low as 0,5 ng TBT-Sn/L. Since 1993, for the littorinid snail Littorina littorea a second virilisation phenomenon, termed intersex, is known. In female specimens affected by intersex the pallial oviduct is transformed of towards a male morphology with a final supplanting of female organs by the corresponding male formations. Imposex and intersex are morphological alterations caused by a chronic exposure to ultra-trace concentrations of TBT. A biological effect monitoring offers the possibility to determine the degree of contamination with organotin compounds in the aquatic environment and especially in coastal waters without using any expensive analytical methods. Furthermore, the biological effect monitoring allows an assessment of the existing TBT pollution on the basis of biological effects. Such results are normally more relevant for the ecosystem than pure analytical data. usw.

Natural ocean alkalinization through erosion of glacial till and weathering at the seafloor: coastal cliff

Climate change-driven deglaciation and erosion in high-latitude regions enhance the flux of terrigenous material to the coastal ocean. Newly exposed land surfaces left behind by retreating glaciers are covered by glacial till, which is rich in fine-grained minerals. Many of these minerals are undersaturated in seawater and thus prone to dissolution (i.e., seafloor weathering). Consequently, intensified erosion and mineral weathering may act as an additional CO₂ sink while supplying alkalinity to coastal waters. To evaluate this hypothesis, we carried out a sediment geochemical study in the southwestern Baltic Sea, where coastal erosion of glacial till is the dominant source of terrigenous material to offshore depocenters. We analyzed glacial till from coastal cliffs, sediments, and pore waters for major element composition using inductively coupled plasma optical emission spectroscopy and an elemental analyzer. Water samples were further analyzed for dissolved redox species and dissolved silica by photometry and ion chromatography. These data were then used to quantify mineral dissolution and precipitation processes and to assess their net effect on inorganic carbon cycling.

TransferWind - H2Mare Forschungs-Transfer, Teilvorhaben: Prüfung der Übertragbarkeit von bestehenden Regularien zur Anwendung bei der Installation und dem Betrieb von Offshore-PtX-Plattformen und die Erarbeitung von Handlungsempfehlungen für die zukünftige Vorschriftenentwicklung

TransferWind - H2Mare Forschungs-Transfer, Teilvorhaben: Rahmenbedingungen für den sicheren und umweltverträglichen Betrieb der Offshore-Anlagen und Erarbeitung eines integrierten Energie- und Wassermanagements zur konzeptionellen Übertragung auf andere PtX-Insellösungen

TransferWind - H2Mare Forschungs-Transfer, Teilvorhaben: projektübergreifendes Wissensmanagement mit bilateralem Wissenstransfer, Wissensvernetzung zwischen Forschung und Industrie zur Schaffung von Standards sowie regulatorischen Konzepten und Einhaltung gesetzlicher Vorgaben

INSPIRE: The 1:5 Million International Geological Map of Europe and Adjacent Area (IGME5000-EU)

The IGME5000-EU (INSPIRE) represents the pre-quaternary bedrock geology (onshore and offshore) of the European map on a scale of 1:5,000,000. According to the Data Specification on Geology (D2.8.II.4_v3.0) the content of the geological map is stored in two INSPIRE-compliant GML files: IGME5000-EU_GeologicUnit.gml contains the geologic units and IGME5000-EU_GeologicStructure.gml comprises the faults. The GML files together with a Readme.txt file are provided in ZIP format (IGME5000-EU-INSPIRE.zip). The Readme.text file (German/English) contains detailed information on the GML files content. Data transformation was proceeded by using the INSPIRE Solution Pack for FME according to the INSPIRE requirements.

(Table 2) Species density and composition of an inshore and offshore station in Kongsfjord, Svalbard

<p>Megafauna plays an important role in benthic ecosystems and contributes significantly to benthic biomass in the Arctic. The distribution is mostly studied using towed cameras. Here, we compare the megafauna from two sites located at different distances from the Kongsfjord: one station at the entrance to the fjord, another on the outer shelf. Although they are only located 25 km apart and at comparable depth, there were significant differences in their species composition. While the inshore station was characterized by shrimps (2.57 +/- 2.18 ind./m**2) and brittlestars (3.21 +/- 3.21 ind./m**2), the offshore site harboured even higher brittlestar densities (15.23 +/- 9.32 ind./m**2) and high numbers of the sea urchin Strongylocentrotus pallidus (1.23 +/- 1.09 ind./m**2). Phytodetrital concentrations of the upper sediment centimetres were significantly higher inshore compared with offshore. At a smaller scale, there were also differences in the composition of different transect sections. Several taxa were characterized by a patchy distribution along transects. We conclude that these differences were caused primarily by habitat characteristics. The seafloor inshore was characterized by glacial soft sediments, whereas the station offshore harboured large quantities of stones. Although the use of a new web-2.0-based tool, BIIGLE (http://www.BIIGLE.de), allowed us to analyse more images (~90) than could have been achieved by hand, taxon area curves indicated that the number of images analysed was not sufficient to capture the species inventory fully. New automated image analysis tools would enable a rapid analysis of larger quantities of camera footage.</p>

Reservoir-modelling and parametrization of a potential reservoir structure (Pilot area B) in the German North Sea

As part of the CDRmare joint project GEOSTOR (https://geostor.cdrmare.de/), the BGR created detailed static geological 3D models for two potential CO2 storage structures in the Middle Buntsandstein in the Exclusive Economic Zone (EEZ) of the German North Sea and supplemented them with petrophysical parameters (e.g. porosities, permeabilities). The 3D geological model (Pilot area B; ~560 km2) is located in the north-western part of the German North Sea sector, the so-called “Entenschnabel”, an approximately 150 kilometer long and 30 kilometer wide area between the offshore sectors of the Netherlands, Denmark and Great Britain (pilot region B). The model in the Ducks Beak is based on several high-resolution 3D seismic data and geophysical/geological information from four exploration wells. It includes 20 generalized faults and the following 16 horizon surfaces: 1) Sea Floor, 2) Mid Miocene Unconformity, 3) Base Tertiary, 4) Base Upper Cretaceous, 5) Base Lower Cretaceous, 6) Base Upper Jurassic, 7) Base Lower Jurassic, 8) Base Muschelkalk, 9) Base Röt, 10) Base Solling Formation, 11) Base Detfurth Formation, 12) Base Volpriehausen Wechselfolge, 13) Base Volpriehausen Formation, 14) Base Triassic, 15) Base Zechstein, 16) Top Basement. The reservoir formed by sandstones of the Middle Buntsandstein is located within the Mads Graben, which is bounded to the west by the extensive Mads Fault (normal fault). Marine mudstones of the Upper Jurassic and Lower Cretaceous serve as the main seal formations. Petrophysical analyses of all considered well data were conducted and reservoir properties (including porosity and permeability) were calculated to determine the static reservoir capacity for these potential CO2 storage structures. The model parameterized and can be used for further dynamic simulations of storage capacity, geo-risk, and infrastructure analyses, in order to develop a comprehensive feasibility study for potential CO2 storage within the project framework. The 3D models were created by the BGR between 2021 and 2024. SKUA-GOCAD was used as the modeling software. We would like to thank AspenTech for providing licenses for their SSE software package as part of the Academic Program (https://www.aspentech.com/en/academic-program).

Anwendungsorientierte Sensordatenfusion für die In-Situ Rotorblatt-Strukturüberwachung, Teilvorhaben: Entwicklung der Radarsensorik

Mit dem 2019 ins Leben gerufenen europäischen Green Deal und den damit verbundenen nationalen Programmen wurde ein Maßnahmenpaket beschlossen, welches einen Transformationsprozess der europäischen Wirtschaft mit dem Ziel eines nachhaltigen und integrativen Wachstums vorsieht. In diesem Zusammenhang kommt der Energiegewinnung aus Windkraft eine herausragende Bedeutung zu. In Deutschland schlägt sich dies im Koalitionsvertrag der Bundesregierung nieder, in dem ambitionierte Ziele für den Ausbau der Windenergie sowohl onshore als auch offshore verfolgt werden. Um dem hohen Kostendruck in der elektrischen Energieerzeugung zu begegnen, wurden in der Windenergie in den letzten Jahren bereits große Erfolge erzielt und die Energieentstehungskosten konnten signifikant gesenkt werden. Bei Fortschreiten dieses Wegs kommt den Rotorblättern eine Schlüsselrolle zu, da sie die Windenergie in mechanisch nutzbare Energie überführen, mit rund 20% direkt zu den Anlagenkosten beitragen und die mechanischen Anlagenlasten signifikant beeinflussen. Für die optimierte Betriebsführung der Windenergieanlagen (WEA) sind jedoch neuartige Ansätze des 'Structural Health Monitorings (SHM)' erforderlich. Insbesondere bei der anwendungsorientierten Entwicklung solcher Systeme gibt es hohen Entwicklungsbedarf! IMST beteiligt sich am Verbundprojekt mit seinem Know-how im Bereich der Radarelektronik. Gemeinsam mit dem Partner TUHH wird ein bestehender Sensorknoten mit 60 GHz Radartechnik erweitert. Dazu gab es bereits Voruntersuchungen der Partner TUHH und GUF auf deren Basis der Radarsensor entwickelt wird. Die neue Antenne soll einen breiteren Beam ermöglichen, um mehr Fläche des Rotorblatts abzudecken. Ziel ist es, mit 4 Sensorknoten ein Rotorblatt zu erfassen. IMST entwickelt neben der Radarelektronik eine passende Antenne und ein Gehäuse, in dem alle elektrischen Komponenten des Sensorknotens eingebaut werden. Für einen Feldversuch in 3 WEAs wird IMST 44 Sensorknoten mit Radar aufbauen.

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