Moisture source identification based on the seasonal isotope variation of precipitation in the Poyang Lake Wetland, China

Tao, Shiyong; Zhang, Xiang; Pan, Guoyan; Xu, Jing; Zeng, Zhenyu

doi:10.1016/j.ejrh.2021.100892

Cited by 13 publications

(5 citation statements)

References 62 publications

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“…Previous studies have revealed that precipitation associated with the continental moisture from the west and northwest was characterized by more enriched isotopic compositions and higher d-excess values than the oceanic moisture sources 36,41 and reported the higher contribution of the continental source responsible for the higher precipitation δ 18 O and d-excess values at the seasonal time scale. 41,49 Therefore, spatially, it is reasonable to infer that precipitation upstream along the upper Jinsha River may be characterized by more enriched isotopic compositions and higher d-excess values as a result of the contribution from the westerly. A recent study has explored the mechanisms of the inverse isotopic altitude effect from an atmospheric circulation perspective using water vapor isotopes on the global scale.…”

Section: 3mentioning

confidence: 98%

“…14 The d excess is a parameter closely associated with the meteorological conditions of the moisture source region and has been used to provide insights into the moisture source identification. 40,41 Differences in the isotopic characteristics between tributary and main stream samples may imply different water sources. During the sampling period, the discharge remained relatively stable at Batang, Benzilan, and Shigu hydrological stations (Figure S1 of the Supporting Information).…”

Section: Stable Isotopic Composition Of Surface Watermentioning

confidence: 99%

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Inverse Isotopic Altitude Effect of Surface Water across the Upper Reaches of the Jinsha River, China: A Consideration of Moisture Sources

Tao

Zhang

Liu

et al. 2023

ACS Earth Space Chem.

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Characterization of the stable isotopic composition of modern surface water is essential to understand the complex hydrological processes in high-altitude mountainous areas. As one of the largest rivers draining from the Tibetan Plateau, there are large gaps in the knowledge of the isotopic variations of surface water across the Jinsha River. Here, we present new isotopic data from surface water along the upper reaches of the Jinsha River in June 2019. An inverse isotopic altitude effect was found with an average altitude gradient of 1.04‰/100 m for δ 2 H and 0.10‰/ 100 m for δ 18 O. The effect of the inflow of the tributary waters on the isotopic characteristics of the main stream was clearly observed. The history of the moisture transportation was evaluated at five major local hydrological stations along the main stream using the HYSPLIT model. A total of three moisture source classifications (southwest monsoon, recycled moisture, and westerly) were summarized, and a gradual increase in the percentage of the westerly was observed with increasing geographical altitude and latitude. A hypothesis was proposed that the moisture sources affected by different monsoons determine the isotopic characteristics of precipitation within the basin, and the rainfall runoff further affects the spatial distribution of surface water isotopes, responsible for the inverse isotopic altitude effect. These findings contribute to a better understanding of the spatial complexity of the isotopic altitude effect of surface water and the hydrological dynamics in the monsoon-influenced rivers around the Tibetan Plateau.

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Section: 3mentioning

confidence: 98%

Section: Stable Isotopic Composition Of Surface Watermentioning

confidence: 99%

Inverse Isotopic Altitude Effect of Surface Water across the Upper Reaches of the Jinsha River, China: A Consideration of Moisture Sources

Tao

Zhang

Liu

et al. 2023

ACS Earth Space Chem.

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“…Sample collections were conducted once in the main stream and tributaries of the Fuhe River, respectively, in January (dry season) and August (rainy season), 2019, with a total of 50 river water samples (Figure 1). January and August are usually characterized by dry and rainy climates, respectively, in Jiangxi [24], so the two months were selected as the sampling periods in this study. Each sample, comprising about 500 mL, was taken at a depth of 50 cm below the water surface in the flowing waterbody and, thus, can reflect the local hydrology and environment without sample replication.…”

Section: Sampling and Analysismentioning

confidence: 99%

Spatio-Temporal Analysis and Health Risk Assessment of Heavy Metals in Water from the Fuhe River, South China

Guo

Xiao²,

Zhao

et al. 2023

Water

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With rapid developments in society and economy, the concentrations of heavy metals in surface water in South China have increased significantly, which poses a serious threat to the regional water security. In this study, the Fuhe River watershed in South China was selected as the study area to analyze physicochemical characteristics and heavy metal (Cu, Zn, Pb, Cd and Cr) concentrations in river water in the dry and rainy seasons, in 2019, with the purpose of exploring their spatial–temporal variations and main influences and assessing the potential health risks of heavy metals. The pH value of river water varied from 5.82 to 7.97, and it fluctuated less overall in the dry season, but it oscillated greatly in the rainy season and was lower, especially in the lower reach of the Fuhe River. The electrical conductivity (EC) value changed between 33 μS/cm and 128 μS/cm and increased and fluctuated along the river flow in the two periods. The concentrations of Cd, Cr, Cu, Pb, and Zn in river water showed obvious differences between the two periods. The concentrations of Cd and Cu were lower with the ranges from 0.001 μg/L to 0.67 μg/L and from 1 μg/L to 12 μg/L, respectively, in the dry season than in the rainy season, while there were inverse cases for other heavy metals. Along the river flow, the Cr concentration was stable, whereas other heavy metals showed increasing trends. It was noted that the concentrations of heavy metals in the Fuhe River were, on average, lower than the Chinese drinking standard values, with the concentration of Pb in the dry season significantly higher than the drinking standard value of the World Health Organization (WHO). Principal component analysis and correlation analysis showed that rock weathering and anthropogenic inputs were the main controlling factors of Cu and Zn in the Fuhe River, and human activities were mainly responsible for Pb, Cr, and Cd concentrations. The health risk assessment results showed that the non-carcinogenic risk (HQingestion) value of Pb was greater than 1 in most sampling points in the middle and lower reaches in the dry season, suggesting a significant non-carcinogenic risk for adults and children by direct ingestion. The minimum carcinogenic risk (CRingestion) value of Cr was more than 10−4 in the rainy and dry seasons, and the CRingestion value of Cd in some sampling points was more than 10−4 in the rainy season, indicating significant cancer risks to adults and children. For areas with significant pollution and health risks in the Fuhe River watershed, it is urgent to strengthen the controls of industrial, agricultural, and urban wastewater discharge.

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“…The height is generally considered to be the largest water vapor transport volume and the precipitation is most likely to start (Aggarwal et al, 2004;Breitenbach et al, 2010;Wei et al, 2018). In addition, we computed the trajectories for 120 h back in time to reconstruct the original transport trajectory because it is sufficient to identify the air mass backward trajectories at the regional scale (Tao et al, 2021).…”

Section: Hybrid Single-particle Lagrangian Integrated Trajectory (Hys...mentioning

confidence: 99%

Isotope composition of daily precipitation from 2019 to 2020 in Sanming, southeastern China

Cai

Yang

Zhou

et al. 2022

Front. Environ. Sci.

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Introduction: Many studies in southeastern China (SEC) have used stable isotope (δD and δ18O) records from natural archives (e.g., stalagmites, tree-ring cellulose, sediments) to reconstruct past East Asian Summer Monsoon (EASM) climate. However, the interpretation of the meanings of isotope variation in these records has not been fully resolved, and the key to solve this problem is to clarify the referential meaning of modern precipitation isotopes.Methods: In this study, we collected daily precipitation from January 2019 to December 2020 in Sanming to clarify the characteristics of isotope variations and their controlling factors during different seasonal periods [e.g., non-summer monsoon (NSM) and summer monsoon (SM)] in SEC.Results and Discussion: Our results show that the precipitation δ18O (δ18Op) and d-excess values in the SM season (−12.94‰–0.15‰, −4.05‰–21.01‰) were more light than those in the NSM season (−6.91‰–4.37‰, 0.85‰–30.38‰). Combining the findings of backward trajectory and averaged outgoing longwave radiation analyses, the seasonal variation of precipitation isotopes is believed to be determined by a shift in water vapor sources and the intensity of upstream atmospheric convection during water vapor transportation. The consistent variation between the isotope values and convective intensity over the South China Sea in the dragon boat rainy period highlights that δ18Op has the potential to respond rapidly to the upstream convective intensity and can serve as a substitute method for investigating the complicated East Asian summer monsoon system. Therefore, the results of this study imply that the stable isotopes in precipitation and related paleoclimate proxies may not reflect the signal of temperature or precipitation alone but rather reflect changes in moisture sources and upstream convective intensity.

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Moisture source identification based on the seasonal isotope variation of precipitation in the Poyang Lake Wetland, China

Cited by 13 publications

References 62 publications

Inverse Isotopic Altitude Effect of Surface Water across the Upper Reaches of the Jinsha River, China: A Consideration of Moisture Sources

Inverse Isotopic Altitude Effect of Surface Water across the Upper Reaches of the Jinsha River, China: A Consideration of Moisture Sources

Spatio-Temporal Analysis and Health Risk Assessment of Heavy Metals in Water from the Fuhe River, South China

Isotope composition of daily precipitation from 2019 to 2020 in Sanming, southeastern China

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