Spatial differentiation in stable isotope compositions of surface waters and its environmental significance in the Issyk-Kul Lake region of Central Asia

Ma, Lingling; Abuduwaili, Jilili; Li, Yao-ming

doi:10.1007/s11629-017-4499-4

Cited by 8 publications

(4 citation statements)

References 48 publications

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“…Studies have shown that the Chu River was a tributary of this lake before 1860 AD and flowed into the desert afterwards until it disappeared (Giralt et al, 2004). The tributaries of this lake principally depend on glacial meltwater, precipitation and groundwater recharge (Gebhardt et al, 2017; Ma et al, 2018). Similar to most glaciated locations around the world, as global warming progresses, glaciers in the Lake Issyk‐Kul basin are shrinking at a rate of 3–30 m each year, and rainfall is intensifying, which increases the risk for flood disasters (Abuduwaili et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

“…Lake Issyk‐Kul, called ‘the pearl of Central Asia’, is located in the western Tianshan Mountains and is the deepest and second largest alpine lake in the world (Li et al, 2018; Podrezov et al, 2020), which makes it an ideal place to research climate and environmental variations and responses in an alpine region. Currently, research in the study area mainly focuses on the utilization and protection of lake water resources (Abuduwaili et al, 2019), relationships between lake level fluctuations and regional climate and runoff (Romanovsky, 2002; Salamat et al, 2015), tree‐ring width‐based climate reconstruction (Zhang et al, 2015), earthquakes (Havenith & Bourdeau, 2010), palaeoclimatic and environmental events (Michael, 2011; Ricketts et al, 2001; Rosenwinkel et al, 2017), and sediment pollution (Li et al, 2018; Ma et al, 2018). However, to date, there is very little research on recent hydrological changes and driving mechanisms using a high‐resolution depositional and geochemical record in Lake Issyk‐Kul, which could provide a better and more complete understanding of the hydrological and environmental processes and their driving factors in Central Asia under global changes.…”

Section: Introductionmentioning

confidence: 99%

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Records of hydrological change and environmental disasters in sediments from deep Lake Issyk‐Kul

Wang

Zhan

et al. 2021

Hydrological Processes

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In the context of global warming, the mountainous areas of Central Asia are sensitive to climate and environmental changes and are highly vulnerable to natural disasters.Here, we use high-resolution lacustrine grain-size and geochemical records from Lake Issyk-Kul to infer hydrological changes, environmental events, and their driving factors in the western Tianshan Mountains of Central Asia over the last 350 years. The regional hydrological and environmental changes can be divided into three phases. In stage I (1674-1860 AD), the values of total organic carbon (TOC), total nitrogen (TN) and magnetic susceptibility (MS) were high, and the element contents changed indistinctively, suggesting that lake water levels were relatively stable. In Stage II (1860-2000 AD), the TOC and TN contents increased, the MS values decreased, and the grain size changed markedly, suggesting that water levels fluctuated dramatically.In Stage III (2000-2013 AD), the coarse particle and migratory element contents increased dramatically, indicating that regional rainfall and runoff increased and that the water level rose. Studies have also shown that the synchronous increases in sedimentary coarse particles, TOC and migratory elements indicate multiple flood events.Extreme floods have been frequent and intense in recent years, which indicates that the climate is generally warming, which is in good agreement with tree ring data, ice core records and other sediment records in alpine regions. Additionally, the lake sediments recorded a seismic event in approximately 1910 AD, which was consistent with historical documentation. Comparative analysis of records suggests that the Atlantic Multidecadal Oscillation is one of the dominant factors driving climate and hydrological changes in the study area. Climate change, combined with natural disasters (e.g., earthquakes) and anthropogenic activities, is generating extreme floods and variations in hydrological patterns in the mountain basin. These findings can provide crucial information about sedimentary physicochemical clues for tracking past hydrological and environmental conditions and contribute to a better understanding of hydrological processes and driving factors in the mountainous areas of Central Asia.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Records of hydrological change and environmental disasters in sediments from deep Lake Issyk‐Kul

Wang

Zhan

et al. 2021

Hydrological Processes

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“…Because high temperature waters reservoirs and steam separation are not expected, the mixing processes are more reliable. Thus, it was shown [76] that the isotopic values of Issyk-Kul Lake and its surrounding high land area are controlled by the isotopic and mass balance between the rapid kinetic evaporation, drainage, and precipitation. It is likely that the heavy waters in Issyk-Kul The δ 18 O and Cl data show that the levels of δ 18 O remain relatively constant (−9.3 to −17.8) whatever the chloride contents varying between 4 and 7594 mg/L.…”

Section: Isotopic Composition Of Watersmentioning

confidence: 99%

Geochemistry of Thermal and Cold Mineral Water and Gases of the Tien Shan and the Pamir

Челноков

Lavrushin

Bragin

et al. 2022

Water

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This study presents the first regional hydrogeochemical portrait of the mineral waters and associated gases of the Central Asia region, shaped by the Tien Shan and the Pamir. A geochemical survey of more than 50 fluid discharges from the Northern Tien Shan to the Pamir was carried out between 2018 and 2019. Isotopic (δD, δ18O, d15N2, d13CCO2, d13CCH4) and chemical data allow elucidating fluid genesis and general evolution in the continental collision zone. Geothermometric estimations as well as the content of the chemical components in waters (Cl, Li, B, Br) and gases (N2, CO2) suggest that the studied waters are not related to the presence of any active hydrothermal systems at shallow depth. Silica and cation geothermometers along with thermodynamic equilibrium calculations indicate that the temperature of unmixed deep fluids does not exceed 110 to 150 °C. The determination of d15N2 and d13CCO2 has revealed that the mantle genesis of gas flux matches with the areas of CO2-rich waters manifestations. The dislocation of mineral and thermal waters of Central Asia along the major regional tectonic structures is provided by topographically driven and well-developed long circulation of waters at the depth of 1 to 4 km.

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“…In the study area of the Issyk−Kul Basin, samples were collected from 19 sampling points during the low river flow period (May 2017), and 19 were collected from the same points during the high−flow period (July and August 2017) (Table 1 and Figure 1), for a total of 38 samples. Due to the influence of mountain topography, the precipitation in Issyk−Kul Lake basin varies greatly from north to south, and the precipitation in the south is significantly higher than that in the north [29], which leads to the long−term interruption of the rivers in the north side of the basin. River water samples that were rinsed three times in situ were collected in 1.5−L polyethylene terephthalate bottles.…”

Section: Sampling and Analysismentioning

confidence: 99%

Heavy Metals and Related Human Health Risk Assessment for River Waters in the Issyk−Kul Basin, Kyrgyzstan, Central Asia

Liu

et al. 2020

IJERPH

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The water resources of Central Asia play an important role in maintaining the fragile balance of ecosystems and the sustainable development of human society. However, the lack of research on the heavy metals in river waters has a far−reaching influence on public health and the sustainable development in Central Asia. In order to reveal the possible sources of the heavy metals and to assess the associated human health risks, thirty−eight water samples were collected from the rivers of the Issyk−Kul Basin during the period with low river flow (May) and the period with high river flow (July and August), and the hydrochemical compositions and major ions of heavy metals were analyzed. No changes in hydrochemical facies were observed between the two periods and the river water type was calcium bicarbonate. Carbonate dissolution and silicate weathering controlled the variation of cations and anions in river waters from the Issyk−Kul Basin. There were some differences in the sources of heavy metals in water bodies between the two periods. During the period with low river flow, heavy metals (Cr) were closely clustered with major ions, indicating that they were mainly affected by water–rock interactions. During the period with high river flow, all heavy metals studied in this paper had different sources of major ions, and the heavy metals maybe influenced by human activities. From the human health risk assessment, the hazard quotients for all samples were less than 1, reflecting that there was no noncarcinogenic risk in the river waters of the Issyk−Kul Basin during the two sampling periods. However, the water samples with carcinogenic risk of arsenic exceeding the threshold (10−4) accounted for 21.1% of the total, indicating that there were some certain carcinogenic hazards for human health via water drinking with direct oral ingestion. The results are of certain significance for the utilization and protection of water resources in the basin as well as the protection of public health.

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Spatial differentiation in stable isotope compositions of surface waters and its environmental significance in the Issyk-Kul Lake region of Central Asia

Cited by 8 publications

References 48 publications

Records of hydrological change and environmental disasters in sediments from deep Lake Issyk‐Kul

Records of hydrological change and environmental disasters in sediments from deep Lake Issyk‐Kul

Geochemistry of Thermal and Cold Mineral Water and Gases of the Tien Shan and the Pamir

Heavy Metals and Related Human Health Risk Assessment for River Waters in the Issyk−Kul Basin, Kyrgyzstan, Central Asia

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