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Registros recuperados: 3
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Climatic variability in the vicinity of Wallis, Futuna, and Samoa islands (13 degrees-15 degrees S, 180 degrees-170 degrees W) ArchiMer
Alory, G; Delcroix, T.
h-lean conditions, seasonal, and ENSO-related (El Nine Southern Oscillation) variability in the vicinity of Wallis, Futuna, and Samoa islands (13 degrees-15 degrees S, 180 degrees-170 degrees W) over the 1973-1995 period are analysed for wind pseudostress, satellite-derived and in situ precipitation, sea surface temperature (SST) and salinity (SSS), sea level, and 0-450 m temperature and geostrophic current. The mean local conditions reflect the presence of the large scale features such as the western Pacific warm pool, the South Pacific Convergence Zone (SPCZ), and the South Pacific anticyclonic gyre. The seasonal changes are closely related to the meridional migrations of the SPCZ, which passes twice a year over the region of study. During the warm phase...
Tipo: Text Palavras-chave: Wallis et Futuna; Samoa; El Niño Oscillation Australe; Variabilité climatique; Wallis and Futuna; Samoa; El Nino Southern Oscillation; Climatic variability.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00325/43608/43913.pdf
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Contribution of climate variability to occurrences of anoxic crises 'malaigues' in the Thau lagoon (southern France) ArchiMer
Harzallah, Ali; Chapelle, Annie.
The Thau lagoon, located in southern France, suffers episodically in summer from anoxic crises known as 'malaigues'. Such crises mostly occur under warm conditions and low winds. In this paper we investigated effects of local weather conditions (air temperature, wind speed and precipitation over southern France), and two climate oscillations (the North Atlantic Oscillation and the El Ni (n) over tildeo Oscillation) on malaigue occurrences based on 33-year data series and dates when malaigues appeared. The study shows that the probability of occurrence of malaigues increases with increasing temperature and decreasing winds in August both mostly associated to the high phase of an index of North Atlantic Oscillation. Malaigues are found to be frequently...
Tipo: Text Palavras-chave: Lagoon; Thau; Malaigues; Anoxic crises; Climate variability; Lagune; Thau; Malaïgue; Eutrophisation; Variabilité climatique.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/2002/publication-517.pdf
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Surges, atmospheric pressure and wind change and flooding probability on the Atlantic coast of France ArchiMer
Pirazzoli, Paolo Antonio.
A statistical study of hourly tide-gauge records at Saint-Gildas, Saint-Nazaire, Port Tudy, Brest, Le Conquet and Roscoff, as well of three-hourly wind and air pressure records at Belie lie and Ouessant over the last 50 years, has made possible the definition of the main meteorological factors which are associated with the development of positive or negative surges. Recent changes in these meteorological factors indicate that atmospheric depressions and strong surge winds are becoming less frequent and that the ongoing trends of climate variability show a decrease in the frequency and hence the gravity of coastal flooding. However the highest sea surges of the last decades did not occur at the time of spring high tide. There is a significant statistical...
Tipo: Text Palavras-chave: Surcote et décote; Vent; Variabilité climatique; Probabilité d'inondation; Côte atlantique française; Surge; Wind; Climate variability; Flooding probability; French Atlantic coast.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00323/43379/42832.pdf
Registros recuperados: 3
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