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Aichner, Bernhard; Makhmudov, Zafar; Rajabov, Ilhomjon; Zhang, Qiong; Pausata, Francesco S R; Werner, Martin; Heinecke, Liv; Kuessner, Marie L; Feakins, Sarah J; Sachse, Dirk; Mischke, Steffen (2019): Geochemical sediment core data (KK 12-1 and KK 12-2) covering 31 kyrs from Lake Karakul, Tajikistan. PANGAEA, https://doi.org/10.1594/PANGAEA.907737, Supplement to: Aichner, B et al. (2019): Hydroclimate in the Pamirs was driven by changes in precipitation‐evaporation seasonality since the last glacial period. Geophysical Research Letters, https://doi.org/10.1029/2019GL085202

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Abstract:
The Central Asian Pamir Mountains (Pamirs) are a high-altitude region sensitive to climatic change, with only few paleoclimatic records available. To examine glacial-interglacial hydrological changes in the region, we analysed geochemical parameters of a 31-kyrs record from Lake Karakul and performed a set of experiments with climate models to interpret the results. δD values of terrestrial biomarkers showed distinct insolation driven trends reflecting major shifts of water vapor sources. For aquatic biomarkers, positive δD shifts driven by changes in precipitation seasonality, were observed at ca. 31-30, 28-26, and 17-14 kyrs BP. Multi-proxy paleoecological data and modelling results suggest that increased water availability, induced by decreased summer-evaporation, triggered higher lake levels during those episodes, possibly synchronous to Northern Hemispheric rapid climate events. We conclude that seasonal changes in precipitation-evaporation-balance significantly influenced the hydrological state of a large waterbody such as Lake Karakul, while annual precipitation amount and inflows remained fairly constant.
Keyword(s):
alkenones; aragonite; Biomarker; Central Asia; dD values; Hydrogen isotopes; isotopes; n-alkanes; paleohydrology; paleolimnology; Pamir; XRF
Further details:
Heinecke, Liv; Mischke, Steffen; Adler, Karsten; Barth, Anja; Biskaborn, Boris K; Plessen, Birgit; Nitze, Ingmar; Kuhn, Gerhard; Rajabov, Ilhomjon; Herzschuh, Ulrike (2017): Climatic and limnological changes at Lake Karakul (Tajikistan) during the last ~29 cal ka. Journal of Paleolimnology, 58(3), 317-334, https://doi.org/10.1007/s10933-017-9980-0
Mischke, Steffen; Lai, Zhongping; Aichner, Bernhard; Heinecke, Liv; Makhmudov, Zafar; Kuessner, Marie L; Herzschuh, Ulrike (2017): Radiocarbon and optically stimulated luminescence dating of sediments from Lake Karakul, Tajikistan. Quaternary Geochronology, 41, 51-61, https://doi.org/10.1016/j.quageo.2017.05.008
Coverage:
Latitude: 39.017606 * Longitude: 73.532728
Date/Time Start: 2012-04-22T00:00:00 * Date/Time End: 2012-04-23T00:00:00
Size:
9 datasets

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Datasets listed in this publication series

  1. Aichner, B; Makhmudov, Z; Rajabov, I et al. (2019): Alkenone concentrations of sediment core KK12-2, Lake Karakul, Tajikistan. https://doi.org/10.1594/PANGAEA.907780
  2. Aichner, B; Makhmudov, Z; Rajabov, I et al. (2019): Elemental composition derived from XRF scanning of sediment core KK12-2, Lake Karakul, Tajikistan. https://doi.org/10.1594/PANGAEA.907783
  3. Aichner, B; Makhmudov, Z; Rajabov, I et al. (2019): High resolution aragonite d13C and d18O values of sediment core KK12-1, Lake Karakul, Tajikistan. https://doi.org/10.1594/PANGAEA.907782
  4. Aichner, B; Makhmudov, Z; Rajabov, I et al. (2019): Low resolution aragonite d13C and d18O values of sediment core KK12-1, Lake Karakul, Tajikistan. https://doi.org/10.1594/PANGAEA.907733
  5. Aichner, B; Makhmudov, Z; Rajabov, I et al. (2019): N-alkanes carbon stable isotopes of sediment core KK12-2, Lake Karakul, Tajikistan. https://doi.org/10.1594/PANGAEA.907732
  6. Aichner, B; Makhmudov, Z; Rajabov, I et al. (2019): N-alkanes concentrations of sediment core KK12-2, Lake Karakul, Tajikistan. https://doi.org/10.1594/PANGAEA.907714
  7. Aichner, B; Makhmudov, Z; Rajabov, I et al. (2019): N-alkanes hydrogen stable isotopes of sediment core KK12-2, Lake Karakul, Tajikistan. https://doi.org/10.1594/PANGAEA.907779
  8. Aichner, B; Makhmudov, Z; Rajabov, I et al. (2019): Scores from principal component analysis of sediment core KK12-1, Lake Karakul, Tajikistan. https://doi.org/10.1594/PANGAEA.907735
  9. Aichner, B; Makhmudov, Z; Rajabov, I et al. (2019): Total organic carbon contents of sediment core KK12-1, Lake Karakul, Tajikistan. https://doi.org/10.1594/PANGAEA.907736