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Climate of the Past An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/cpd-5-1493-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/cpd-5-1493-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  25 May 2009

25 May 2009

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This preprint was under review for the journal CP but the revision was not accepted.

Synchronous variations of precipitation and temperature at Lake Qinghai, NE Tibetan Plateau during the past 800 years and their relations to solar activity: evidence from Li/Ca ratios and δ18O values of ostracod shells

Z. Zhu1,2, J. Chen1, J. Li1,2, Y. Zeng1,2, J. Li1, J. Wang1,2, and L. Qi3 Z. Zhu et al.
  • 1The State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
  • 2Graduate School of Chinese Academy of Sciences,Beijing 100049, China
  • 3The State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China

Abstract. Variations of precipitation and temperature at Lake Qinghai, NE Tibetan Plateau on decadal scales during the past 800 years were reconstructed based on the oxygen isotope values and Li/Ca ratios from ostracod shells of the single species Eucypris inflata. Higher temperature relates to lower Li/Ca ratios; higher precipitation relates to lower δ18O values, and vice versa. The good correlation between Li/Ca ratios and δ18O values of ostracod shells indicates that temperature variations corresponded well with precipitation variations on decadal scales during the past 800 years. Variations of precipitation and temperature are synchronous with variations of solar activity reconstructed from the atmospheric 14C concentration in tree rings and the 10Be concentration in ice cores. These findings suggest that, on decadal scales solar activity may be responsible for the synchronous variations of precipitation and temperature at Lake Qinghai, NE Tibetan Plateau during the past 800 years. Keywords: Precipitation variations; Temperature variations; Eucypris inflata; Li/Ca; δ18O; Synchronous variations; Lake Qinghai; Solar activity.

Z. Zhu et al.

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Z. Zhu et al.

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