The effect of the seasonality of moisture sources on moisture flux and precipitation stable isotopes in the Shiyang River Basin

Zhang, Miaomiao; Jia, Wenxiong; Zhu, Guannan; Zhang, Fuhua; Xiong, Hui; Yang, Le; Zhang, Yue; Lan, Xin

doi:10.1007/s00704-022-04290-3

Cited by 3 publications

(3 citation statements)

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“…The low values of δ 2 H and δ 18 O were mostly found in winter because of the low temperature and the depletion of moisture after long-distance transport [16]. In the study area, moisture in winter is mainly transported by westerly, which originated from the Atlantic passes through Central Asia and then encounters mountains to form precipitation, leading to stable isotope depletion through Rayleigh fractionation during longer distance transportation [36]. As the temperature increases in spring, the values of δ 2 H and δ 18 O gradually increase.…”

Section: Monthly and Seasonal Variationsmentioning

confidence: 99%

Section: Monthly and Seasonal Variationsmentioning

confidence: 99%

“…Overall, spring and summer are primarily influenced by the moisture source area but autumn and winter are primarily influenced by secondary processes. Zhang et al [36] pointed out that as the lower relative humidity of the westerly moisture source area causes higher d-values in spring, but influenced by the monsoon moisture, the d-values are lower in summer, however, the higher contribution of local recycling moisture causes higher d-values in autumn. In winter, the raindrops that fall in the dry atmosphere are influenced by sub-cloud secondary evaporation, which reduces lower d-values.…”

Section: Monthly and Seasonal Variationsmentioning

confidence: 99%

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Spatial and Temporal Variation Characteristics of Stable Isotopes in Precipitation and Their Relationships with Meteorological Factors in the Shiyang River Basin in China

Lan,

Jia,

Zhu

et al. 2023

Water

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Stable isotopes of precipitation play an important role in understanding hydrological and climatic processes of arid inland river basins. In order to better understand the difference of regional water cycle and precipitation patterns, precipitation samples were collected in Shiyang River Basin from June 2018 to May 2020, and spatial and temporal variation characteristics of stable isotopes in precipitation and their relationships with meteorological factors were discussed. The results showed that stable isotopes in precipitation showed seasonal variation characteristics, that δ2H and δ18O values were higher in summer and autumn and lower in winter and spring, and d-excess values were higher in spring and autumn and lower in winter and summer. Slopes and intercepts of the local meteoric water lines gradually increased with elevation increasing. δ18O significantly showed a positive correlation with temperature but a negative correlation with precipitation in summer. Contrary to below 15 hPa, δ18O significantly showed a negative correlation with water vapor pressure above 15 hPa. Due to the influence of meteorological factors, there are significant differences in stable isotopes of precipitation in arid inland river basins, which were more influenced by local moisture recycling in upstream area but by below-cloud secondary evaporation in mid-downstream area.

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Section: Monthly and Seasonal Variationsmentioning

confidence: 99%

Section: Monthly and Seasonal Variationsmentioning

confidence: 99%

Section: Monthly and Seasonal Variationsmentioning

confidence: 99%

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