SOGIR 01
| Type | Oceanographic cruise |
|---|---|
| Set | This cruise is part of the set SOGIR |
| Ship | Cote D'Aquitaine |
| Ship owner | CNRS |
| Dates | 30/01/2001 - 09/11/2001 |
| Chief scientist(s) | CASTAING Patrice, LECONTE Michel |
ENVIRONNEMENTS ET PALÉOENVIRONEMENTS OCÉANIQUES ET CONTINENTAUX (EPOC) - TALENCE UMR CNRS 5805 EPOC - OASU - Université de Bordeaux Bâtiment A12 351 Cours de la Libération 33405 TALENCE CEDEX +33 (0)5 40 00 36 15 |
|
| DOI | 10.17600/1410010 |
| Objective | Necessary data were acquired from the Coastal zone observation service (CNRS/INSU/SOMLIT) and from the Ecological monitoring service at the Le Blayais site (EDF) to ensure long-term monitoring of the Gironde estuary, initiated in 1978. Better understanding of the seasonal variability of studied parameters arising from sudden events (floods) or more gradual phenomena (atmospheric warming, river flow rates) at 4 stations located along the estuary. Days at sea were: 30/01-02/02, 11-14/03, 30/03-02/04, 30/04-03/05,11-13/06, 19/06,03-06/07,27/08-30/08, 10-13/09, 09-12/10,06-09/11. The Coastal zone observation service (SOMLIT) federating the marine stations at Wimereux, Roscoff, Brest, Arcachon (http://www.epoc.u-bordeaux.fr), Banyuls, Villefranche-sur-Mer and Endoume, aims to record the long-term trends in coastal ecosystems subject to anthropogenic or climatic influences. In this context, a scientific program monitoring the long-term trends in the Gironde estuary was implemented. The annual and interannual variability--whose study is one of the main objectives of the observation service--can only be studied if samples are taken throughout the year (impact of winter floods on the hydro-sedimentology and on the biological cycle of zooplanktonic species). SOMLIT is based on a coherent network of measurement points (in number and location) to sample neritic and estuarian waters. Ten times a year, samples are taken at 4 stations at a set point during a tidal cycle under comparable tidal conditions (neap tide). Samples are taken four times, at intervals of about 2 to 3 hours: 1 at high water, 2 mid-tide, 1 at low water, and at two levels: 1 m below the surface and 1 m above the seabed. |
