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Conference Reference Are juveniles from mixed spawning populations or not? Tracing juvenile sole arriving at the Belgian nursery using genomics and otolith shape
Located in Library / RBINS Staff Publications 2016
Conference Reference River-Ocean Models as Support to eutrophication management
Located in Library / RBINS Staff Publications 2016
Inproceedings Reference Manganese layered oxides (asbolane, lithipophorite and intermediates) identification and characterization by Raman and infrared spectroscopy
In this study, Raman and infrared spectroscopy is applied to investigate two manganese oxide phases: lithiophorite [(Al,Li)Mn4+O2(OH)2] and asbolane [(Ni,Co)xMn4+(O,OH)4.nH2O], along with their intermediates (“Asbolane-Lithiophorite Intermediates”: ALI). These oxides typically incorporate variable concentrations of Co, Ni, Cu and Li. They represent a group of economically interesting phases that are difficult to identify and characterize with classical X-ray diffraction techniques. They were described in many places around the world, including the oxidized horizon of large ore deposits in New-Caledonia, Australia, the Democratic Republic of the Congo (DRC) amongst others. They also represents phases encountered as Ni-Co enriched manganese nodules of the deep ocean floors. Our results show that Lithium-bearing manganese oxides with typical X-ray diffraction lines of lithiophorite can exhibit two different Raman responses, namely the one of a typical lithiophorite and the one of ALI. This difference of reaction between X-ray and Raman methods strengthen the model developed in literature [2] that the X-ray diffraction lines of these oxides result primarily from one component of the structure, the MnO6 octahedra layers. In the same way, the reflectors associated with the unstructured Ni-Co oxide layers in asbolane are too weak to be visible on X-ray diffraction patterns. By contrast, the Raman responses are also driven by the chemical composition of the samples, allowing a more precise characterization. We propose reference Raman spectroscopic signatures for lithiophorite, asbolane and ALI phases. These spectra are mainly composed of two spectral domains, the first one is located between 370-630 cm-1 and the second one between 900-1300 cm-1. We then assess the impact of their highly variable chemistry on their Raman peak positions, intensities and FWHM using a semi-systematic curve-fitting method profiled for these phases. The strong affinities observed between the Raman spectral content of asbolane, lithiophorite and their intermediates, combined with the progressive trend observed for some peak parameters indicate that the studied phases represent probably a solid solution.
Located in Library / RBINS Staff Publications 2016
Inproceedings Reference Aerial imagery from an high-altitude drifting balloon platform : applications in geohazards monitoring (Sierra Arana, Spain and Mons Province, Belgium)
A new type of untethered balloon based mapping platform allows affordable remote sensing applications from higher altitudes and with a greater range and payload capacity than common motorized UAV’s. The airborne device, called « Stratochip » is based on a dual helium balloons configuration. At a defined altitude (comprised between 500 and 30000m), the first balloon is released, drastically reducing the platform climbing rate. The payload (up to 10kg) can then drift in a sub-horizontal trajectory until it leaves a pre-defined area of interest. Leaving the pre-defined area, the second balloon is released and the payload is recovered after a parachute landing. The predicted flight path of the Stratochip, launch site and surveyed area are calculated using both forecasted (NOAA model) and real-time (inborne instruments) meteorological data, along with the physical parameters of the balloons and parachute. The predicted recovery area can also be refined in real-time to secure and facilitate equipment retrieval. In this study, we present the results of two cartographic campaigns made in Belgium (Ground collapse near Mons) and Spain (karstic field in the Eastern part of Sierra Arana, Granada region). Those campaigns aimed to test the usability of the Stratochip to survey a large area (up to 900km² for Spain) at medium and low altitudes (8000m - 500m) and produce an updated Digital Elevation Model and orthophoto mosaic of those regions. For that purpose, the instrument installed in the Stratochip payload was constituted of a digital camera stabilized with two IMU’s and two brushless motors. An automated routine then tilted the camera at predefined angles while taking pictures of the ground. This technique allowed to maximize the photogrammetric information collected on a single pass flight, and improved the DEM reconstruction quality, using structure-from-motion algorithms. The quality of produced DEM were then evaluated by comparing the level and accuracy of details and surface artefacts between available topographic data (LIDAR, SRTM, topographic maps) and the Stratochip sets. This evaluation showed that the models were in good correlation with existing data, and can be readily be used in geomorphology, structural and natural hazard studies.
Located in Library / RBINS Staff Publications 2016
Inproceedings Reference Building a transnationally harmonised marine geological database
Within the framework of marine resource management, a common knowledge base is being developed on the distribution, composition and dynamics of various geological resources. Focus is on data from the Belgian part of the North Sea, being representative of a typical sandbank sedimentary system. To ensure harmonised seabed mapping over large, supraregional areas and to facilitate the exchange of information, special attention was paid to compatibility with marine geodatabases from the adjacent Netherlands territory. With reference to the seabed and its subsurface, two main databases are being compiled: one comprising all available lithological descriptions and one with all numerical grain-size information. To enable standardisation of the data and make them easily query-able, non-numerical descriptions are being coded to an international standard (EU FP7 Geo-Seas; www.geoseas.eu), of which the Udden-Wentworth scale is the main classifier. Several other parameters were derived, such as percentages mud, sand, gravel, shells and organic material. For the sediment database, cumulative grain-size-distribution curves were compiled, enabling calculations of any desired granulometry parameter, such as percentages of the grain-size fractions (fine, medium, coarse sand) and percentiles that are relevant in seabed-habitat mapping or sediment-transport modelling (D35, D50, D84). For both databases, the completeness and accuracy of the metadata were considered highly important. Information about sampling and coring techniques, analytical methods, horizontal and vertical positioning accuracy, and the exact timing of data acquisition is pivotal in uncertainty analyses, which are an increasingly important element of seabed mapping. The time of seabed mapping is critical to convert measured water depths to a common datum such as TAW in Belgium, facilitating integration of sample data in bathymetry data and thus their incorporation in 4D-modelling studies on morphodynamic change. For Belgium, the geological databases will be imbedded in the data infrastructure of the Belgian Marine Data Centre (www.bmdc.be), ensuring compatibility with international standards and providing easy access to a wide user community. Following processing to generate data products such as resource-related subsurface models, visualisation is foreseen through Subsurface Viewer (GmbH INSIGHT). Applied maps and models thus disseminated are crucial in decision making, and invaluable for outreach and educational purposes. The newly developed database and its associated data products will contribute to the objectives of the projects TILES (Belspo Brain-be), EMODnet-Geology (EU DG MARE), and ZAGRI (private revenues from the marine-aggregate industry).
Located in Library / RBINS Staff Publications 2016
Inproceedings Reference Is TNT leaking to the North Sea?
Located in Library / RBINS Staff Publications 2016
Webpublished Reference NOOS-Drift, an innovative operational transnational multi-model ensemble system to assess ocean drift forecast accuracy.
In case of maritime pollution, man-overboard, or objects adrift at sea, national maritime authorities of the 9 countries bordering the European North West Continental Shelf (NWS) rely on drift model simulations in order to better understand the situation at stake and plan the best response strategy. So far, the drift forecast services are mainly managed at national levels with almost no integration at the transnational level. Designed as a support service to the national drift forecasting services, NOOS-Drift has the ambition to change this paradigm. NOOS-Drift is a distributed transnational multi-model ensemble system to assess and improve drift forecast accuracy in the European North West Continental Shelf. Developed as a one-stop-shop web service, the service allows registered users (national drift model operators or trained maritime authorities) to submit on-demand drift simulation requests to be run by all the national drift forecasting services connected to NOOS-Drift. Within 15 minutes after activation, the NOOS-Drift users shall get access to the drift simulation results of the individual ensemble members, as well as the results of a multi-models joint analysis assessing the ensemble spread and delineating risk areas to locate possible maritime pollution. This operation of such a distributed multi-models service is to our knowledge a world premiere. In this communication, we will present the technical and scientific developments that had to be done to make this service possible, including: - a robust, secure and latency-free communication system that coordinates the execution of the different national models - a strategy to build the multi-model ensemble - a definition of drift forecast accuracy - the joint multi-model analysis tools - the standard file formats and visualisation means. Finally we will illustrate on an example how the NOOS-Drift service could change the decision making process.
Located in Library / RBINS Staff Publications 2020
Inproceedings Reference Detecting Xenopus laevis in Belgium using eDNA and qPCR
Located in Library / RBINS Staff Publications 2022 OA
Inproceedings Reference First record and DNA identification of the Pacific oyster, Crassostrea gigas (Thunberg, 1793), in the southern Black Sea
Located in Library / RBINS Staff Publications 2022 OA
Inproceedings Reference Regional heritage stone diversity in stone-poor landscapes, the example of northern Belgium.
Located in Library / RBINS Staff Publications 2023