Data/hora: 01/06/2024 04:59:37

Provedor de dados: | 5
País: | France
Título: | Contribution of climate variability to occurrences of anoxic crises 'malaigues' in the Thau lagoon (southern France)
Autores: | Harzallah, Ali; Chapelle, Annie.
Data: | 2002-03
Ano: | 2002
Palavras-chave: | Lagoon; Thau; Malaigues; Anoxic crises; Climate variability; Lagune; Thau; Malaïgue; Eutrophisation; Variabilité climatique.
Resumo: | 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 preceded by increased precipitation in July which contributes to a larger nutrient input into the lagoon and to its eutrophication. It is also found that malaigues coincide with the warm phase of an El Ni (n) over tildeo-Southern Oscillation-like oscillation and are most significantly associated to values of this oscillation during the preceding May. This result is used to propose a simple method for an early warning of appearance of malaigues with a high degree of confidence. (C) 2002 Ifremer/CNRS/IRD/Editions scientifiques et medicales Elsevier SAS. All rights reserved.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/2002/publication-517.pdf

DOI:10.1016/S0399-1784(02)01184-2

Editor: | Elsevier
Relação: | http://archimer.ifremer.fr/doc/00000/517/
Formato: | application/pdf
Fonte: | Oceanologica Acta (0399-1784) (Elsevier), 2002-03 , Vol. 25 , N. 2 , P. 79-86
Fonte: | 2002 Ifremer/CNRS/IRD/Éditions scientifiques et médicales Elsevier SAS. All rights reserved.