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Spatial distribution and temporal variability of stable water isotopes in a large and shallow lake
Xiao W.; Wen, X. F.; Wang, W.; Xiao, Q. T.; Xu, J. Z.; Cao, C.; Xu, J. P.; Hu, C.; Shen, J.; Liu, S. D.; Lee, X. H.
Source PublicationIsotopes in Environmental and Health Studies
KeywordEvaporation hydrogen-2 isotope hydrology lake water oxygen-18 residence time spatial distribution seasonal variability Taihu lake river water canada evaporation balance surface taihu china precipitation groundwater hydrology
AbstractStable isotopic compositions of lake water provide additional information on hydrological, meteorological and paleoclimate processes. In this study, lake water isotopic compositions were measured for more than three years in Lake Taihu, a large and shallow lake in southern China, to investigate the isotopic spatial and seasonal variations. The results indicated that (1) the whole-lake mean H-2 and O-18 values of the lake water varied seasonally from -48.4 +/- 5.8 to -25.1 +/- 3.2 parts per thousand and from -6.5 +/- 0.9 to -3.5 +/- 0.8 parts per thousand, respectively, (2) the spatial pattern of the lake water isotopic compositions was controlled by the direction of water flow and not by local evaporation rate, and (3) using a one-site isotopic measurement to represent the whole-lake mean may result in unreasonable estimates of the isotopic composition of lake evaporation and the lake water residence time in poorly mixed lakes. The original data, documented here as an online supplement, provides a good reference for testing sensitivity of lake water budget to various isotopic sampling strategies. We propose that detailed spatial measurement of lake water isotopic compositions provides a good proxy for water movement and pollutant and alga transports, especially over big lakes.
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Document TypeSCI/SSCI论文
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GB/T 7714
Xiao W.,Wen, X. F.,Wang, W.,et al. Spatial distribution and temporal variability of stable water isotopes in a large and shallow lake. 2016.
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