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Climatological and hydrological influences on stable hydrogen and oxygen isotopes of active layer waters, Levinson-Lessing Lake area, Taymyr Peninsula



Climatological and hydrological influences on stable hydrogen and oxygen isotopes of active layer waters, Levinson-Lessing Lake area, Taymyr Peninsula



Collection Nordicana 57(Pages 65-70



Stable isotope data (delta (super 18) O, delta D) of precipitation and active layer waters were collected in the Levinson-Lessing Lake catchment, Taymyr, Siberia during 1994 and 1995. They are used here in conjunction with hydrological and microclimate data to provide information on water-forming processes in the active layer. Summer precipitation defines a local meteoric water line different from the global meteoric water line, suggesting that the source of summer precipitation has been exposed to evaporative isotopic enrichment. The stable isotope composition of active layer waters indicate that they are mostly fed by summer rain. Small isotopic variabilities between sites in the catchment indicate differences in microclimatic and hydrologic characteristics. Furthermore, the isotope ratios have been successfully applied to differentiate between sources of active layer waters (snow and ground ice melt, rain water). Further studies are required to develop universally applicable models that describe isotopic behaviour in the active layer in these areas.

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