Deep-water renewal in Lake Issyk-Kul

Martin K. Vollmer, Ray F. Weiss, Peter Schlosser, Robert T. Williams

Research output: Contribution to journalArticle


The deep-water renewal rates of Lake Issyk-Kul are studied using the time-dependent anthropogenically produced tracers sulfur hexafluoride (SF6), chlorofluorocarbons (CFCs) and tritium-helium-3. SF6 and the CFCs are used to calibrate a mixing model from which the vertical age distribution is calculated and found to be comparable to the SF6 apparent ages. Based on this model, the mean age of the water below 100 m depth is 6.1 yrs. The mean oxygen consumption rate for the same depth range is 6.4 μmol kg-1 yr-1 and the mean remineralization rates for nitrate, phosphate and silicate are 0.53, 0.003 and 0.67 μmol kg-1 yr-1, respectively.

Original languageEnglish (US)
Pages (from-to)124-1-124-4
JournalGeophysical Research Letters
Issue number8
StatePublished - Apr 15 2002


ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Vollmer, M. K., Weiss, R. F., Schlosser, P., & Williams, R. T. (2002). Deep-water renewal in Lake Issyk-Kul. Geophysical Research Letters, 29(8), 124-1-124-4.