Data/hora: 01/06/2024 09:58:13

Provedor de dados: | 5
País: | France
Título: | Hydrologie saisonniere du Golfe du Lion (travaux de f « ichthys » (1966-1967)
Autores: | Tournier, Henri.
Data: | 1969-09
Ano: | 1969
Resumo: | The Ichthys, a research ship of the Institute of Maritime Fishing's laboratory at Sète, conducted 11 hydrological campaigns from February 1966 to December 1967, each one of them including 25 stations distributed throughout the Gulf of Lion from the coast to a depth of 100 metres (figure 1). The plankton catches performed at each station and locating the schools of fish by depth sensor have already allowed us to bring to light the correlation that exists between environmental conditions and sardine egg laying (LEE, PARK, TOURNIER and ALDEBERT, 1967). This research consists in making use of the data collected by the Ichthys on temperature and salinity. It ensues from that of FURNESTIN (1960), FURNESTIN and ALLAIN (1962) and ALLAIN and FURNESTIN (1969). The temperatures were measured using Richter and Wiese or Yoshino thermometers placed on Tsurumi microbe sampling bottles (of the Nansen type). The various corrections were made as well as the calculation of the equipment's immersion depth, which was measured according to the angle formed by the cable. The total number of temperature measurements is 2,250; the precision obtained is two hundredths of a degree. Moreover, the Richard bathythermograph gave us information, at each station, about the situation of the thermocline. The salinity analyses, of which there are 2,250, were done at first using Knudsen's chemical method then, from February 1967 on, with an Auto-Lab induction salinometer. The large number of observations makes it possible to define the hydrological situation at each period as well as its changes during the year. Meteorological information transmitted by Aix-en-Provence's Regional Centre of the National Weather Service and guidelines on the rate and temperature of the waters of the Rhone, provided by the Special Service of Bridges and Roadways in Avignon, were put to good use. This study is divided into three parts. The first two parts deal with the horizontal and vertical distribution of salinity and temperatures for each campaign, in 1966 then in 1967. Figure 1 shows the setting up of the various stations and the layout of the sections. Maps of the isotherms and isohalines are shown for each level studied. A single section (C) linking the mouth of the Têt to the Planier shoal is given for the months of February and March 1966. For the succeeding campaigns, three sections were thus established: the first (C1) from the mouth of the Tech to the Planier, along the outside-most sector worked on, has 8 stations; the second (C2) from Cape Leucate to the Estaque (6 stations); the third (C3) from La Nouvelle to the Gulf of the Saintes-Maries (5 stations). To make interpreting the data easier, we have reproduced the surface in 3D in the sector located to the north of the sections and up to the coast. In the third part, the variations of the hydrological status between the various seasons of 1966 and 1967 are interpreted based on outside factors. Moreover, diagrams of the average distribution of the waters present at the various periods of the year are given.
Tipo: | Text
Idioma: | Francês
Identificador: | http://archimer.ifremer.fr/doc/1969/publication-3178.pdf
Editor: | ISTPM
Relação: | http://archimer.ifremer.fr/doc/00000/3178/
Formato: | application/pdf
Fonte: | Revue des Travaux de l'Institut des Pêches Maritimes (0035-2276) (ISTPM), 1969-09 , Vol. 33 , N. 2 , P. 265-300
Fonte: | Ifremer