Rapid deep-water renewal in Lake Issyk-Kul (Kyrgyzstan) indicated by transient tracers

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2002
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Hofer, Markus
Aeschbach-Hertig, Werner
Brennwald, Matthias S.
Holocher, Johannes
Livingstone, David M.
Romanovski, Vladimir
Kipfer, Rolf
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Limnology and Oceanography. 2002, 47(4), pp. 1210-1216. ISSN 0024-3590. eISSN 1939-5590
Zusammenfassung

Simultaneous profiles of the transient tracers sulfur hexafluoride (SF6), 3H-3He, and the chlorofluorocarbons CFC-11 and CFC-12 were measured in Lake Issyk-Kul, a large, deep lake in Kyrgyzstan. Apparent water ages derived from these measurements suggest rapid mixing, with a deepwater renewal rate > 10% yr21 at 650 m depth. SF6 and 3H-3He ages agree reasonably well, whereas CFC ages are significantly greater. The discrepancy is explained by the nonlinear relationship between tracer age and tracer concentration and by the flattening of the atmospheric growth curves for CFCs. Novel to physical limnology is the application of SF6 dating, which proves to be an excellent tool for the study of mixing in lakes, complementing 3H-3He and CFC dating techniques.

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570 Biowissenschaften, Biologie
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Lake Issyk-Kul, Kyrgyzstan, transient tracers
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ISO 690HOFER, Markus, Frank PEETERS, Werner AESCHBACH-HERTIG, Matthias S. BRENNWALD, Johannes HOLOCHER, David M. LIVINGSTONE, Vladimir ROMANOVSKI, Rolf KIPFER, 2002. Rapid deep-water renewal in Lake Issyk-Kul (Kyrgyzstan) indicated by transient tracers. In: Limnology and Oceanography. 2002, 47(4), pp. 1210-1216. ISSN 0024-3590. eISSN 1939-5590
BibTex
@article{Hofer2002Rapid-8079,
  year={2002},
  title={Rapid deep-water renewal in Lake Issyk-Kul (Kyrgyzstan) indicated by transient tracers},
  number={4},
  volume={47},
  issn={0024-3590},
  journal={Limnology and Oceanography},
  pages={1210--1216},
  author={Hofer, Markus and Peeters, Frank and Aeschbach-Hertig, Werner and Brennwald, Matthias S. and Holocher, Johannes and Livingstone, David M. and Romanovski, Vladimir and Kipfer, Rolf}
}
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