http://hdl.handle.net/2268/152 Search this channel search http://orbi.ulg.ac.be/simple-search http://hdl.handle.net/2268/150740 Title: The Black Sea ecosystem: study of its evolution and modifications using a 1D couled physical-biogeochemical models <br/> <br/>Author, co-author: Grégoire, Marilaure; Raick, C.; Soetaert, K. Tue, 18 Jun 2013 09:56:36 GMT http://hdl.handle.net/2268/150720 Title: The Black Sea ecosystem: study of its evolution and modifications using 3D and 1D couled physical-biogeochemical models <br/> <br/>Author, co-author: Grégoire, Marilaure; Beckers, Jean-Marie; Friedrich, J.; Heip, P.; Konovalov, S.; Raick; Stanev, E.; Soetaert, K. Tue, 18 Jun 2013 09:05:45 GMT http://hdl.handle.net/2268/150714 Title: Marine research at the Liège University: a long tradition of oceanography far away from the sea <br/> <br/>Author, co-author: Grégoire, Marilaure; MARE interfacultry research centre, . <br/> <br/>Abstract: MARE gathers 24 laboratories of the Faculties of Science, Applied Science, Law and Veterinary Medicine. It integrates complementary disciplines of Oceanology through both pluridisciplinary field works and modeling. Major research themes of MARE are: 1) The detection and prediction of changes in coastal ecosystems integrating data collection, the development of statistical tools and 3D interdisciplinary models used conjointly with specific diagnostic tools tailored to management purposes; 2) The study of the CO2 dynamics in order to budget fluxes in major coastal areas and the Southern Ocean, through data collection, satellite imagery and modeling studies; 3) The dynamic and diversity of the Ocean Pelagic Ecosystem; 4) Biodiversity and taxonomic studies in different coastal and deep-sea areas; 5) Study of marine trophic webs using stable carbon and nitrogen isotopes; 6) Ecotoxicology and Ecophysiology: study of the effects of pollutants on marine organisms including marine mammals and investigations on genetic diversity, pathology and causes of death of marine mammals and seabirds; 7) Ecology of macrophytes systems and of benthic algae; 8) Sediments studies (e.g. sediment transport, sediment structure analysis, benthic habitats characterization and diversity); 9) Reconstruction of paleocirculations using isotope analysis (Nd, Pb); 10) Study of coastal evolution and management. This includes the study of coastal geomorphology using remote sensing data and coastal engineering. Moreover, MARE researchers have access to the research station STARESO in Corsica (http://www.stareso.com/), and to the Belgian R.V. Belgica, which operates in the North Sea and adjacent areas (http://www.mumm.ac.be/EN/Monitoring/Belgica/). Finally, the MARE centre supports the extant set of second and third cycle Teachings (master in Oceanography; http://www.ulg.ac/oceanbio/, DEA in Oceanology, European DEA in Marine Environment Modeling) - unique in the French-speaking Community of Belgium -, of a Doctoral School, and of international Conferences and Colloquia (The International Liège Colloquium on Ocean Dynamics and associated Symposia). Tue, 18 Jun 2013 08:53:48 GMT http://hdl.handle.net/2268/150709 Title: Exchange processes and nitrogen cycling on the shelf and slopes area of the Black Sea basin. <br/> <br/>Author, co-author: Grégoire, Marilaure; Beckers, Jean-Marie; Kostianoy, A.; Nezlin, N.; Stanev, E.; Nihoul, Jacques Tue, 18 Jun 2013 08:39:49 GMT http://hdl.handle.net/2268/150705 Title: Quantification of the nitrogen budget in the Black Sea using a 3D coupled hydrodynamical-biogeochemical model <br/> <br/>Author, co-author: Grégoire, Marilaure; Nezlin, N.; Kostianoy, A.; Nihoul, Jacques Tue, 18 Jun 2013 08:23:38 GMT http://hdl.handle.net/2268/150703 Title: Inco-Copernicus project: Ventilation of the Black Sea's anoxic waters <br/> <br/>Author, co-author: Grégoire, Marilaure; Ozsoy, E. Tue, 18 Jun 2013 08:20:42 GMT http://hdl.handle.net/2268/150700 Title: Coupled Hydrodynamical Ecosystem model of the Black Sea a basin scale. First result of a high resolution 3 D interdisciplinary model. <br/> <br/>Author, co-author: Grégoire, Marilaure; Beckers, Jean-Marie; Nihoul, Jacques Tue, 18 Jun 2013 08:05:39 GMT http://hdl.handle.net/2268/150699 Title: Application of a coupled 3D eddy-resolving hydrodynamical and ecosystem model to the study of the Black sea's primary production repartition <br/> <br/>Author, co-author: Grégoire, Marilaure; Nihoul, Jacques Tue, 18 Jun 2013 07:59:09 GMT http://hdl.handle.net/2268/150518 Title: Atmospheric and oceanic climate forcing of the exceptional Greenland ice sheet surface melt in summer 2012 <br/> <br/>Author, co-author: Hanna, E.; Fettweis, Xavier; Mernild, S.; Cappelen, J.; Ribergaard, M.; Shuman, C.; Steffen, K.; Wood, L.; Mote, T. <br/> <br/>Abstract: The NASA announcement of record surface melting of the Greenland ice sheet in July 2012 led us to examine the atmospheric and oceanic climatic anomalies that are likely to have contributed to these exceptional conditions and also to ask the question of how unusual these anomalies were compared to available records. Our analysis allows us to assess the relative contributions of these two key influences to both the extreme melt event and ongoing climate change. In 2012, as in recent warm summers since 2007, a blocking high pressure feature, associated with negative NAO conditions, was present in the mid-troposphere over Greenland for much of the summer. This circulation pattern advected relatively warm southerly winds over the western flank of the ice sheet, forming a ‘heat dome’ over Greenland that led to the widespread surface melting. Both sea-surface temperature and sea-ice cover anomalies seem to have played a minimal role in this record melt, relative to atmospheric circulation. Two representative coastal climatological station averages and several individual stations in south, west and north-west Greenland set new surface air temperature records for May, June, July and the whole (JJA) summer. The unusually warm summer 2012 conditions extended to the top of the ice sheet at Summit, where our reanalysed (1994–2012) DMI Summit weather station summer (JJA) temperature series set new record high mean and extreme temperatures in 2012; 3-hourly instantaneous 2-m temperatures reached an exceptional value of 2.2°C at Summit on 11 July 2012. These conditions translated into the record observed ice-sheet wide melt during summer 2012. However, 2012 seems not to be climatically representative of future ‘average’ summers projected this century. Fri, 14 Jun 2013 19:51:07 GMT http://hdl.handle.net/2268/150515 Title: Magnetic susceptibility as a high-resolution correlation tool and as a climatic proxy in Paleozoic rocks - merits and pitfalls: examples from the Devonian in Belgium. <br/> <br/>Author, co-author: Da Silva, Anne-Christine; De Vleeschouwer, David; Boulvain, Frédéric; Claeys, Philippe; Fagel, Nathalie; Humblet, MArc; Mabille, Cédric; Michel, J; Sardar Abadi, Mehrdad; Pas, Damien; Dekkers, Mark Fri, 14 Jun 2013 16:13:13 GMT http://hdl.handle.net/2268/150383 Title: Sensitivity of the Black Sea's ecosystem to physical processes. First results of a high resolution 3D interdisciplinary model <br/> <br/>Author, co-author: Grégoire, Marilaure; Beckers, Jean-Marie; Nihoul, Jacques; Stanev, E. Thu, 13 Jun 2013 14:12:03 GMT http://hdl.handle.net/2268/150382 Title: Simulation of the annual plankton productivity cycle in the Black Sea with a 3D high resolution interdisciplinary model <br/> <br/>Author, co-author: Grégoire, Marilaure; Beckers, Jean-Marie; Nihoul, Jacques; Stanev, E. Thu, 13 Jun 2013 14:02:09 GMT http://hdl.handle.net/2268/150381 Title: Changes in sub-fossil chironomid assemblages in two Northern Patagonian lake systems associated with the occurrence of historical fires <br/> <br/>Author, co-author: Araneda, A.; Jana, P.; Ortega, C.; Torrejo´n, F.; Betrand, S.; Vargas; Fagel, Nathalie; Alvarëz, D.; Stehr, A.; Urrutia, R. Thu, 13 Jun 2013 13:53:42 GMT http://hdl.handle.net/2268/150380 Title: Coupled Hydrodynamic Ecosystem model of the Black Sea at basin scale <br/> <br/>Author, co-author: Grégoire, Marilaure; Beckers, Jean-Marie; Nihoul, Jacques; Stanev, E. Thu, 13 Jun 2013 13:50:24 GMT http://hdl.handle.net/2268/150378 Title: Preliminary study of the Black Sea's plankton bloom <br/> <br/>Author, co-author: Grégoire, Marilaure; Nihoul, Jacques Thu, 13 Jun 2013 13:44:14 GMT http://hdl.handle.net/2268/150376 Title: Application of a data-interpolating variational analysis (DIVA) tool to physical and biogeochemical measurements covering the Black Sea <br/> <br/>Author, co-author: Joassin; Beckers, Jean-Marie; Boicenco, L.; Capet, Arthur; Grégoire, Marilaure; Moncheva, S.; Naithani, J.; Ouberdous, Mohamed; Troupin, Charles <br/> <br/>Abstract: The European project SESAME (Southern European Seas: Assessing and Modelling Ecosystem changes) is dedicated to the assessment of ecological changes in the Mediterranean and Black seas during these last decades. This assessment will be done by combining statistical analysis of available data and the development of a 3D hydrodynamical-biogeochemical model. Data available since 1960 for the Black Sea from the databases MEDAR and NATO have been completed with data provided by SESAME partners. These data sets have been analyzed using DIVA, a geostatistical analysis tool developed by the GHER laboratory of the University of Liège. The DIVA analysis relies on a finite element resolution, taking into account coastlines, sub-basins, and advection by ocean currents. DIVA analysis generates spatially interpolated fields for biogeochemical and physical variables. Outputs consist in sets of analysis as well as error fields, and colorimetric scaled maps related to several depth layers. Biogeochemical variables considered consist in measures of chlorophyll, inorganic nutrients concentration, and phytoplankton abundances; physical variables consist in temperature and salinity. These treatments of the Black sea data sets offer an overview of the global pattern of the Black sea biogeochemical structure, and its evolution through the time periods concerned by the project. The interpolated fields generated by the DIVA tool will be used to validate the outputs of the 3D hydrodynamical-biogeochemical model developed for the north-western shelf of the Black sea in the framework of SESAME. Thu, 13 Jun 2013 13:26:47 GMT http://hdl.handle.net/2268/150372 Title: Understanding the Black Sea ecosystem functioning during the eutrophication phase using mathematical modelling <br/> <br/>Author, co-author: Grégoire, Marilaure; Capet, Arthur; Barth, Alexander; Borges, Alberto; Beckers, Jean-Marie; Joassine, P.; Naithani, J.; Soetaert, S.; Vandenbulcke, L. Thu, 13 Jun 2013 13:14:46 GMT http://hdl.handle.net/2268/150367 Title: Spatial and temporal variability of benthic fluxes and diagenetic pathways of organic matter in the north-western Black Sea <br/> <br/>Author, co-author: Friedrich, J.; Friedl, G.; Bondar, C.; Pimenov, N.; Wehrli, B.; Grégoire, Marilaure Thu, 13 Jun 2013 13:02:12 GMT http://hdl.handle.net/2268/150359 Title: The north-eastern Black Sea redox zone hydrochemical structure: observed concentrations and estimated fluxes <br/> <br/>Author, co-author: Yakushev, E.V.; Chasovnikov, V.K.; Debolskaya, E.I.; Grégoire, Marilaure; Podymov, O.I.; Yakubenko, V.G. <br/> <br/>Abstract: The fine structure of the hydrophysical and hydrochemical parameters observed in the northeastern Black Sea during the 1999-2002 RV ”Akvanavt” cruises is discussed. The observed increase of organic phosphorus and urea at the boundary of oxic and anoxic waters testify that the hydrochmical structure is significantly influenced by chemosynthesis. The calculated nitrogen compound fluxes support the idea that organic nitrogen can be the significant part of total nitrogen in the oxic/anoxic interface. Thu, 13 Jun 2013 12:36:04 GMT http://hdl.handle.net/2268/150342 Title: The north-eastern Black Sea redox zone hydrochemical structure: observed concentrations and estimated fluxes <br/> <br/>Author, co-author: Grégoire, Marilaure Thu, 13 Jun 2013 10:10:08 GMT