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Li, Xiangzhong; Liu, Weiguo; Xu, Liming (2012): Stable isotope and Caesium records of sediment core LG06 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.784342, Supplement to: Li, X et al. (2012): Stable oxygen isotope of ostracods in recent sediments of Lake Gahai in the Qaidam Basin, northwest China: The implications for paleoclimatic reconstruction. Global and Planetary Change, 94-95, 13-19, https://doi.org/10.1016/j.gloplacha.2012.06.005

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Abstract:
The oxygen isotopic composition of ostracod shells in lakes has been used as a useful indicator in palaeolimnological research and has provided some important contributions to the understanding of lacustrine systems. Usually, the oxygen isotopic compositions of ostracods from the lake sediments are interpreted as changes in effective precipitation, temperature and evaporation/input water ratio in a sub-arid or arid area. Here, we compare a 150-year-long oxygen-isotope record that was derived from ostracod carbonate from the sediments of Lake Gahai in the Qaidam Basin with meteorological data (precipitation) and tree-ring evidence for changing precipitation. Our results show that the oxygen isotopic compositions of ostracod shells are related to precipitation over the past 150 years. In general, increased precipitation accompanied a shift to less positive d18O values in the lake water, and thus in the ostracod shells, whereas decreased precipitation coincided with the opposite in Lake Gahai over the past 150 years. Therefore, we conclude that the oxygen isotopic compositions of ostracod shells can be used to indicate changes in precipitation over a short time scale in Lake Gahai.
Coverage:
Latitude: 37.133125 * Longitude: 97.549353
Event(s):
LG06 * Latitude: 37.133125 * Longitude: 97.549353 * Location: Lake Gahai, Qaidam Basin, Qinghai Province, northwest China * Method/Device: Gravity corer (GC)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets

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Datasets listed in this publication series

  1. Li, X (2012): Stable isotope ratios of ostracods from sediments of Lake Gahai. https://doi.org/10.1594/PANGAEA.784307
  2. Li, X (2012): Caesium activity in sediment profile from Lake Gahai. https://doi.org/10.1594/PANGAEA.784340