Abstract
We sampled a short sediment core in Lake Kongmo Co on the southern Tibetan Plateau,and extracted terrigenous alkanes (n-C_(25) to n-C_(31)) from the core spanning the past near-50 years at 7-year resolution,and compared the hydrogen isotope ratios of these biomarkers with meteorological records of the nearby Langkazi and Lhasa weather stations.Hydrogen isotope ratios of these n-alkanes significantly correlated with mean growing season air temperature,whereasδD values of these biomarkers showed poor correlations with both precipitation amount and relative humidity during the growth seasons,indicating that these n-alkanes recorded the air temperature signal and can be used as a proxy for paleotemperature reconstruction.
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