The stable isotope composition of waters of the eastern Mediterranean Sea

Joel R. Gat, Aldo Shemesh, Eli Tziperman, Artur Hecht, Dimitri Georgopoulos, Ozden Basturk

Research output: Contribution to journalArticlepeer-review

128 Scopus citations

Abstract

Waters of the eastern Mediterranean portray an unusual pattern of stable isotope composition compared with other evaporitic systems: an increase in 18O concentration up to value of δ18O = +2.2‰ is not matched by a commensurate increase of deuterium. It is shown that this unusual pattern is an expression of the "medi-terranean" location of the sea, where the air-sea interaction with relatively dry and isotopically depleted continental air masses dominates the evaporation process in winter and where the diluting meteoric waters are extremely depleted in the heavy isotopes. As a result, the slope of the evaporation line in δ(2H)-δ(18O) space is lower than in other marine systems, whereas the mixing line between the meteoric waters and the seawater is very steep. This pattern provides an independent method for the estimation of the evaporation E and freshwater influx terms M of the water balance of the Mediterranean Sea. In winter the ratio of evaporation to freshwater input is found to be E/M= 1.20, whereas in summer this ratio E/M= 1.83.

Original languageEnglish
Article number95JC02829
Pages (from-to)6441-6451
Number of pages11
JournalJournal of Geophysical Research
Volume101
Issue numberC3
DOIs
StatePublished - 1 Jan 1996
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Oceanography
  • Forestry
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences (miscellaneous)
  • Paleontology

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