Data/hora: 02/06/2024 10:59:39

Provedor de dados: | 5
País: | France
Título: | Abrupt changes in the characteristics of atlantic and levantine intermediate waters in the southeastern levantine basin
Autores: | Hecht, A.
Data: | 1992
Ano: | 1992
Palavras-chave: | SOUTHEASTERN LEVANTINE BASIN; LEVANTINE WATER MASSES; LEVANTINE INTERMEDIATE WATER; ATLANTIC INFLOWING WATERS; LEVANTINE SURFACE WATERS.
Resumo: | Data from twenty consecutive cruises, carried out over a period of five years, were investigated in order to reveal temporal changes in the characteristics of the AW (Atlantic Waters) and the LIW (Levantine Intermediate Waters) in the Southeastern Levantine basin. The results indicated a seasonal trend in the AW, which appear to be poorly defined during winter and spring but which, as the year progresses and as the LSW (Levantine Surface Waters) form and penetrate downward, become better defined, and occupy a narrower layer whose depth increases. There appeared to be no season related variations in the LIW. Moreover, abrupt, significant, and apparently irreversible changes in the characteristic salinity of the AW and the LIW occurred in the Southeastern Levantine basin during 1982. Therefore we are witnessing a change in the volume and the rate of exchange of waters between the Atlantic Ocean and the Mediterranean Sea. These changes can be attributed either to the enhanced diversion and utilization of river waters (in particular the Nile waters), or to regional climatic changes due to the greenhouse effect. In all probability both causes have contributed their share. However, whereas the exploitation of fresh waters can be well monitored, we are almost entirely ignorant with regard to the rate of local climatic changes and their effects on the formation of the local water masses. Close and persistent monitoring of AW inflow, LIW formation, and the dispersion of the two water masses could provide us with a sensitive tool for enhancing our understanding of climatic change processes.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/00100/21158/18777.pdf
Editor: | Gauthier-Villars
Relação: | http://archimer.ifremer.fr/doc/00100/21158/
Formato: | application/pdf
Fonte: | Oceanologica Acta (0399-1784) (Gauthier-Villars), 1992 , Vol. 15 , N. 1 , P. 25-42