References of "Barth, Alexander"
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See detailPlankton Data Products
Barth, Alexander ULiege; Beauchard, Olivier; Herman, Peter et al

Conference (2019, May 15)

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See detailOnline DIVAnd Recent progress \& hurdles
Barth, Alexander ULiege; Beckers, Jean-Marie ULiege; Troupin, Charles ULiege

Conference (2019, May 10)

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See detailDIVA & DIVAnd interpolation tools: All you need to know about them
Troupin, Charles ULiege; Barth, Alexander ULiege; Watelet, Sylvain ULiege et al

Conference (2019, April 11)

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See detailFrom in situ observations to gridded fields using DIVAnd and the cloud
Troupin, Charles ULiege; Barth, Alexander ULiege; Watelet, Sylvain ULiege et al

Conference (2019, April 09)

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See detailUpscaling or a local model in a regional-scale model
Vandenbulcke, Luc ULiege; Barth, Alexander ULiege

in Ocean Science (2019), 15(2), 291-305

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See detailEvaluation of HF Radar Blending
Subekti Mujiasih, ULiege; Hartanto, Dwi; Barth, Alexander ULiege et al

Conference (2018, December 07)

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See detailGenerating ocean climatologies from in situ observations
Barth, Alexander ULiege; Troupin, Charles ULiege; Watelet, Sylvain ULiege et al

in IMDIS 2018 International Conference on Marine Data and Information Systems, Book of Abstracts (2018, November 07)

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See detailThe 48th Liege colloquium: submesoscale processes: mechanisms, implications, and new frontiers
Barth, Alexander ULiege; Mahadevan, Amala; Pascual, Ananda et al

in Ocean Dynamics (2018), 68(8), 1067-1069

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See detailHistory of the participation to the Colloquium: spatial analysis and time series
Troupin, Charles ULiege; Peelen, Charlotte ULiege; Alvera Azcarate, Aida ULiege et al

Conference (2018, June 01)

Since 1969, the Liège Colloquium on Ocean (Hydro)Dynamics is organised on a yearly basis and has gathered more than 3300 scientists in editions articulated around specific topics covering a wide range of ... [more ▼]

Since 1969, the Liège Colloquium on Ocean (Hydro)Dynamics is organised on a yearly basis and has gathered more than 3300 scientists in editions articulated around specific topics covering a wide range of disciplines and many sub-regions of the global ocean. Following the 3rd Edition (1971), the organizing committee proposed to make the Colloquium an annual event: “It is a great joy for the Organizing Committee to realize that, in the same time, the continuation of the Colloquia was deeply desired by all the participants and that their gratifying determination was indeed answerable for making, from now on, the Liège Colloquium on Ocean Hydrodynamics an annual meeting.” The present work presents a first analysis of the data collected on 1. the number of participants, 2. the abstracts received and 3. the articles published in the special editions. The data were processed in order to produce choropleth maps and time series. For the most recent editions, the information was available from the colloquium websites and from the journals publishing the special issue, whereas for the first editions, the printed versions of the journals were the only source of information. As of January 2017, the information from the 1990’s could not be recovered due to the absence of participant lists in the journals and the probable loss of lists, either in paper and electronic formats. While the attendance was not the main target for the successive organising committees since the topics were often very specific, it is worth noting a general increase in the number of participants and the represented countries. For instance, the 2013 edition, dedicated to the “Primary production in the ocean: from the synoptic to the global scale”, was attended by 220 scientists from 35 countries. An EOF approach was used to estimate the missing values in the different times series. In particular, based on the past editions and the number of abstracts received before the deadline, we use the DINEOF tool to estimate the number of participant for this edition. The forecast value is 112 participants. All the data and source codes are made available through GitHub (https://github.com/gher-ulg/Liege-Colloquium-on-Ocean-Dynamics), while the interactive maps and times series are displayed at https://gher-ulg.github.io/Liege-Colloquium/, with the idea that these datasets and maps will be updated every year and that more sophisticated analysis will be performed. [less ▲]

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See detailModelling the hydrodynamics of the Southern Bight of the North Sea: Skills assessment of different configurations (i.e. nesting) in the perspective of coupling with sediment transport
Ivanov, Evgeny ULiege; Capet, Arthur ULiege; Barth, Alexander ULiege et al

Poster (2018, May)

The impact of offshore wind farm installation and dredging activities on the spatial distribution and dynamics of sediment grain size, biogeochemistry and biodiversity will be estimated in the Southern ... [more ▼]

The impact of offshore wind farm installation and dredging activities on the spatial distribution and dynamics of sediment grain size, biogeochemistry and biodiversity will be estimated in the Southern Bight of the North Sea (SBNS) with a focus on the Belgian Coastal Zone (BCZ) in the frame of the FaCE-It research project (Functional biodiversity in a Changing sedimentary Environment: Implications for biogeochemistry and food webs in a managerial setting). The three-dimensional hydrodynamical model ROMS-COAWST was implemented for simulation of the complex hydrodynamics of SBNS and sediment transport. The first level of nesting with the resolution of 1 km was used in the area of Belgian Economical Zone. In order to reach a fine resolution of 250 m in the BCZ, the second level of nesting will be used. Six-hourly ECMWF ERA-interim meteorological data was used to force the model at the sea-air boundary and the coarse resolution model results available from Copernicus Marine Environment Monitoring Service were used to force the model at the open boundaries. Tides and rivers were also considered. Next types of long-run simulations have been conducted: a 10-years climatological simulation and an interannual simulation over 2004-2013 in order to investigate the interannual dynamics. The model accuracy was evaluated through validation of its outputs against observed salinity, temperature and currents data (remote sensing and in-situ). Results validation of currents and temperature and salinity horizontal fields and vertical profiles against available satellite fields and in-situ data, i.e. from the project field campaign, is conducted and discussed. Application of the nested grid and its benefits for results accuracy is also presented. [less ▲]

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See detailEstimating Optimum Observation Error Covariance for Blending Radial HF Radar and Model in the Sunda Strait
Subekti Mujiasih, ULiege; Riyadi, Mochammad; Wandono, DR et al

Conference (2018, April 26)

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See detailpydiva2d: a python interface to the DIVA interpolation software
Troupin, Charles ULiege; Barth, Alexander ULiege; Watelet, Sylvain ULiege et al

Poster (2018, April 11)

A set of python tools to help users in the preparation of DIVA input files and the visualisation of the outputs of the interpolation.

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See detailNotebooks to document workflow: a possible component in Virtual Research Environments
Troupin, Charles ULiege; Barth, Alexander ULiege; Watelet, Sylvain ULiege et al

Poster (2018, April 11)

We plan too use jupyter notebooks both as a user guide and as a user interface to describes the different steps to generate research products.

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See detailState-of-the-art stochastic data assimilation methods for high-dimensional non-Gaussian problems
Vetra-Carvalho, Sanita; van Leeuwen, Peter Jan; Nerger, Lars et al

in Tellus. Series A (2018), 70

This paper compares several commonly used state-of-the-art ensemble-based data assimilation methods in a coherent mathematical notation. The study encompasses different methods that are applicable to high ... [more ▼]

This paper compares several commonly used state-of-the-art ensemble-based data assimilation methods in a coherent mathematical notation. The study encompasses different methods that are applicable to high-dimensional geophysical systems, like ocean and atmosphere and provide an uncertainty estimate. Most variants of Ensemble Kalman Filters, Particle Filters and second-order exact methods are discussed, including Gaussian Mixture Filters, while methods that require an adjoint model or a tangent linear formulation of the model are excluded. The detailed description of all the methods in a mathematically coherent way provides both novices and experienced researchers with a unique overview and new insight in the workings and relative advantages of each method, theoretically and algorithmically, even leading to new filters. Furthermore, the practical implementation details of all ensemble and particle filter methods are discussed to show similarities and differences in the filters aiding the users in what to use when. Finally, pseudo-codes are provided for all of the methods presented in this paper. [less ▲]

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See detailApplication of two way nesting model to upscale sediment processes of the Southern Bight of the North Sea: full model validation
Ivanov, Evgeny ULiege; Capet, Arthur ULiege; Barth, Alexander ULiege et al

Poster (2018, March)

The BRAIN project FaCE-iT (Functional biodiversity in a Changing sedimentary Environment: Implications for biogeochemistry and food webs in a managerial setting) funded by BELSPO aims at evaluating the ... [more ▼]

The BRAIN project FaCE-iT (Functional biodiversity in a Changing sedimentary Environment: Implications for biogeochemistry and food webs in a managerial setting) funded by BELSPO aims at evaluating the influence of offshore wind farms settlements and dredging activities on the distribution of sediment grain size over the Southern Bight of the North Sea (SBNS) and the Belgian Coastal Zone (BCZ), as well as associated impacts on biodiversity and biogeochemistry.In this framework an implementation of the tri-dimensional hydrodynamical and sediment transport model ROMS-COAWST was set-up to conduct scenario experiment relating offshore activities to resulting alteration of the seafloor structure. This implementation combines high resolution nested grids covering the Belgian Coastal Zone, embedded into a coarser grid covering the Southern Bight of the North Sea and is forced by ECMWF ERA-Interim data at the air-sea interface, CMEMS data at the open boundaries, TPXO data to introduce/force the tidal impact, and consider the discharge of four main rivers. Currently, the work focuses on assessing the skills of this modelling system to resolve the dynamics of the complex shallow and highly tidal region. The 3-year climatological run for 2006-2009 was performed to test the model ability to simulate the interannual dynamics. The model skills were evaluated by validation against remote-sensing temperature fields, tidal elevations and currents at the Meetnet pylons, and in situ temperature and salinity data provided by the Lifewatch network. We evaluate how grid refinement and different set-up of the nesting strategy enhance essential model skills in relation with sediment transport The further step will be to confront the sediment transport dynamics stemming from the nested system to that resolved from the coarser parent alone. A diagenetic model developed in the frame of FaCE-iT will be joint with the sediment model in order to upscale locally derived alteration of the biogeochemistry and benthic functionality stemming from seafloor texture alteration. [less ▲]

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See detailDIVA software and the cloud
Troupin, Charles ULiege; Barth, Alexander ULiege; Watelet, Sylvain ULiege et al

Conference (2018, January 22)

Detailed reference viewed: 36 (9 ULiège)