Geochemical sediment core data (KK 12-1 and KK 12-2) covering 31 kyrs from Lake Karakul, Tajikistan
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2019
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| _version_ | 1867168572637184000 |
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| author | 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 |
| author_facet | 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 |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_907737 |
| institution | PANGAEA |
| language | en |
| publishDate | 2019 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Geochemical sediment core data (KK 12-1 and KK 12-2) covering 31 kyrs from Lake Karakul, Tajikistan 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 Alkenones; aragonite; Biomarker; Central Asia; dD values; Hydrogen isotopes; isotopes; n-alkanes; paleohydrology; Paleolimnology; Pamir; XRF 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. |
| title | Geochemical sediment core data (KK 12-1 and KK 12-2) covering 31 kyrs from Lake Karakul, Tajikistan |
| topic | Alkenones; aragonite; Biomarker; Central Asia; dD values; Hydrogen isotopes; isotopes; n-alkanes; paleohydrology; Paleolimnology; Pamir; XRF |
| url | https://doi.org/10.1594/PANGAEA.907737 |