Consulta: subjectFacets:"Tendance"
Registros recuperados: 2
Data/hora: 08/06/2024 18:22:10

Analyse des tendances des séries temporelles de la concentration en azote minéral dissous dans les trois principaux estuaires de la façade Manche-Atlantique
Provedor de dados: 5
Autores: Gailhard, Isabelle.
Estuaries are areas which, from their structure, their fonctioning, and their localisation, are subject to significant contribution of nutrients. One of the objectif of the RNO, the French network for coastal water quality monitoring, is to assess the levels and trends of nutrient concentrations in estuaries. A linear model was used in order to describe and to explain the total dissolved nitrogen concentration evolution in the three most important estuaries on the Chanel-Atlantic front (Seine, Loire and Gironde). As a first step, the selection of a reliable data set was performed. Then total dissolved nitrogen evolution schemes in estuary environment were graphically studied, and allowed a resonable choice of covariables. The salinity played a major role...
Tipo: Text
Palavras-chave: Nutriments; Estuaire; Loire; Seine; Gironde; Schéma de dilution; Modèle linéaire; Tendance; Nutrients; Estuary; Seine; Loire; Gironde; Dilution schema; Linear mode1; Trend.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00079/19070/16665.pdf

Spatial and temporal trends of sea surface temperature in the northwest African region
Provedor de dados: 5
Autores: Ould-dedah, S; Wiseman, Wj; Shaw, Rf.
The timing and structure of sea surface temperature (SST) changes were investigated using data from the continental shelf of the northwest African region and from coastal stations in Mauritania. Empirical Orthogonal Function analysis of the data revealed differences between northern regions with permanent upwelling, and southern regions where the upwelling is seasonal. It is then hypothesized that shifts in the onset and duration of upwelling may be occurring. Furthermore, the Mauritanian shelf area, a transition zone between the northern and southern regions, appears to go through a series of cooling and warming trends, which seem to be part of a long-term process affecting the northwest African coast. In this regard. it is shown that there is a strong...
Tipo: Text
Palavras-chave: Température superficielle; Upwelling; Tendance; Mauritanie; Afrique du Nord-Ouest; Sea surface temperature; Upwelling; Trends; Mauritania; Northwest Africa.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43609/43910.pdf