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International Journal of Salt Lake Research

, Volume 2, Issue 2, pp 93–110 | Cite as

Dissolved oxygen in the Dead Sea— seasonal changes during the holomictic stage

  • Michal Shatkay
  • David A. Anati
  • Joel R. Gat
Article

Abstract

Measurements of dissolved oxygen, density and temperature were con ducted in the Dead Sea between August 1987 and December 1989. Oxygen concentrations were found to vary around an average value of 0.8 mlSTP (standard temperature and pressure) per kg. Dissolved oxygen variations were found to reflect both physical processes (a deepening of the epilimnion, a turnover etc.) and chemical processes (oxidation reduction). Transport coefficients for the oxygen exchange across the air/sea interface were found to be generally low compared to expected values based on laboratory experiments; the presence of surface films which inhibit the gas exchange rates under calm weather conditions is suspected. During stormy weather, the exchange rates were considerably higher, suggesting that the entrainment of bubbles was involved in the gas exchange process.

Key Words

Dead Sea dissolved oxygen gas exchange 

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References

  1. Anati, D.A., Stiller, M., Shasha, S., and Gat, J.R., 1987. Changes in the thermohaline structure of the Dead Sea: 1979–1984.Earth Planetary Science Letters 84: 109–121.CrossRefGoogle Scholar
  2. Anati, D.A., and Stiller, M., 1991. The post-1979 thermohaline structure of the Dead Sea and the role of double-diffusive mixing.Limnology and Oceanography 36: 342–354.Google Scholar
  3. Anati, D.A., in press. The Dead Sea pycnocline in exceptionally rainy years.International Journal of Salt Lake Research.Google Scholar
  4. Bender, M.L., and Grande, K.D., 1987. Production, respiration, and the isotope geochemistry of O2 in the upper water column.Global Biogeochemical Cycles 1: 49–59.CrossRefGoogle Scholar
  5. Bitan, A., 1970. A topo-climatological investigation in the Kallia region. Report, Geography Department, Hebrew University.Google Scholar
  6. Craig, H., and Hayward, T., 1987. Oxygen supersaturation in the ocean: biological versus physical contributions.Science 235: 199–202.PubMedCrossRefGoogle Scholar
  7. Freeze R.A., and Cherry J.A., 1979.Groundwater. Prentice-Hall, Englewood-Cliffs, N.J.Google Scholar
  8. Gat, J.R., and Shatkay, M., 1991. Gas exchange with saline waters.Limnology and Oceanography 36: 988–997.Google Scholar
  9. Hasse, L., and Liss, P.S., 1980. Gas exchange across the air-sea interface.Tellus 32: 470–481.Google Scholar
  10. Kroopnick, P.M., 1971. Oxygen and carbon in the oceans and atmosphere stable isotopes as tracers for consumption, production, and circulation models. Ph.D. Dissertation, University of California.Google Scholar
  11. Levy, Y., 1980. Seasonal and long range changes in oxygen and hydrogen sulfide concentration in the Dead Sea.Geological Survey of Israel Rep., MG/9/80.Google Scholar
  12. Liss, P.S., and Merlivat, L., 1986. Air-sea gas exchange rates: Introduction and synthesis. In: P. Baut-Menard (Ed.)The Role of Air-Sea Exchange in Geochemical Cycles. pp. 113–128. Reidel, Dordrecht.Google Scholar
  13. Livingstone, D.M., and Imboden, D.M., 1993. The non-linear influence of wind speed variability on gas transfer in lakes. Tellus 45B: 275–295.Google Scholar
  14. Mazor E., Rosenthal E., and Ekstein J., 1969. Geochemical tracing of mineral water sources in the south western Dead Sea basin, Israel.Journal of Hydrology 7: 246–275.CrossRefGoogle Scholar
  15. Neev D., and Emery, K.O., 1967. The Dead Sea: Depositional processes and environments of evaporites.Geological Survey of Israel, Bulletin 41: 1–147.Google Scholar
  16. Nishri A., and Ben-Yaacov, S., 1990. Solubility of oxygen in the Dead Sea brine.Hydrobiologia 197: 99–104.CrossRefGoogle Scholar
  17. Oren, A., 1989. Halobacteria in the Dead Sea in 1988–1989: novel approaches to the estimation of biomass and activity.Environmental Quality and Ecosystem Stability: Vol.IV-B,Environmental Quality ISEEQS Pub.: 247–255.Google Scholar
  18. Oren, A., 1992. Bacterial activities in the Dead Sea, 1980-1991: Survival at the upper limit of salinity.International Journal of Salt Lake Research 1: 7–20.CrossRefGoogle Scholar
  19. Peng T.-H., Broecker, W.S., Mathieu, G.G., and Li Y.-H., 1979. Radon evasion rates in the Atlantic and Pacific oceans as determined during the Geosecs program.Journal of Geophysical Research 84: 2471–2486.CrossRefGoogle Scholar
  20. Shatkay, M., 1990. Gas exchange across a gas-saline interface Ph.D. Thesis, Weizmann Institute of Science, Rehovot.Google Scholar
  21. Shatkay, M., 1991. Dissolved oxygen in highly saline sodium chloride solutions in the Dead Sea—measurements of its concentration and isotopic composition.Marine Chemistry 32: 89–99.CrossRefGoogle Scholar
  22. Shatkay, M., and Ronen, D., 1992. Bubble populations and gas exchange in hypersaline solutions: a preliminary study.Journal of Geophysical Research 97: 7361–7362.CrossRefGoogle Scholar
  23. Stanhill, G., 1985. Updated energy balance estimate of evaporation from the Dead Sea.Israel Meteorological Research Papers 4: 98–116.Google Scholar
  24. Steinhorn, I., Assaf, G., Gat, J.R., Nishri, A., Nissenbaum, A., Stiller, M., Beyth, M., Neev, D., Garber, R., Friedman, G.M., and Weiss, W., 1979. The Dead Sea; deepening of the mixolimnion signifies the overturn of the water column.Science 206: 55–57.PubMedCrossRefGoogle Scholar
  25. Stiller, M., Carmi, I., and Kaufman, A., 1988. Organic and inorganic14C concentrations in the sediments of lake Kinneret and the Dead Sea (Israel) and the factors which control them.Chemical Geology 73: 63–68.Google Scholar
  26. Stiller, M., and Chung, Y.C., 1984. Radium in the Dead Sea a possible tracer for the duration of meromixis.Limnology and Oceanography 29: 574–786.CrossRefGoogle Scholar
  27. Stiller, M., and Kaufman, A., 1984.210Pb and210Po during the destruction of stratification in the Dead Sea.Earth Planetary Science Letters 71: 390–404.CrossRefGoogle Scholar
  28. Weiss, R.F., 1970. The solubility of nitrogen, oxygen and argon in water and seawater.Deep Sea Research 17: 721–735.Google Scholar
  29. Weiss R.F., and Price B.A., 1989. Dead Sea gas solubilities.Earth Planetary Science Letters 92: 7–10.CrossRefGoogle Scholar

Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • Michal Shatkay
    • 1
  • David A. Anati
    • 1
  • Joel R. Gat
    • 1
  1. 1.Department of Environmental Sciences and Energy ResearchWeizmann Institute of ScienceRehovotIsrael

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