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| Troupin, Charles; Ouberdous, Mohamed; Barth, Alexander; Bassompierre, Marc; Coatanoan, Christine; Grandi, Alessandro; Lind Johansen, Sigrid; Ostensen, Oivind; Scory, Serge; Tonani, Marina; Toussaint, Marie-eve; Tronconi, Cristina; Beckers, Jean-marie. |
| In the frame of the SeaDataNet project, several regional climatologies for the temperature and salinity are being developed by different groups. The data used for these climatologies are distributed by the 40 SeaDataNet data centers. Such climatologies have several uses: 1. the detection of outliers by comparison of the in situ data with the climatological fields, 2. the the optimization of locations of new observations, 3. the initialization of numerical hydrodynamic models. 4. definition of a reference state to identify anomalies and to detect long-term climatic trends Diva (Data Interpolating Variational Analysis) software is adapted to each region by taking into account the geometrical characteristics (coastlines, bathymetry) and the distribution of... |
| Tipo: Text |
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| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00323/43447/42821.pdf |
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| Barth, Alexander; Troupin, Charles; Reyes, Emma; Alvera-azcarate, Aida; Beckers, Jean-marie; Tintoré, Joaquin. |
| In this document we describe a new application of DIVAnd (Data-Interpolating Variational Analysis, in n-dimensions) for high-frequency (HF) radar currents. DIVAnd is a tool to interpolate observations on a regular grid using the variational inverse method. We have extended DIVAnd to include additional dynamic constraints relevant to surface currents, including imposing a zero normal velocity at the coastline, imposing a low horizontal divergence of the surface currents, temporal coherence and simplified dynamics based on the Coriolis force and the possibility of including a surface pressure gradient. The impact of these constraints is evaluated by cross-validation using the HF radar surface current observations in the Ibiza Channel from the Balearic... |
| Tipo: Text |
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| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00675/78713/80905.pdf |
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