Primary study on the environmental significances of grain-size changes of the Lake Bosten sediments

Huang, Xiaozhong; Chen, Fahu; Xiao, Shuyu; Lv, Yanbin; Chen, Jianhui; Ai-feng, ZHOU

doi:10.18307/2008.0305

Cited by 6 publications

(2 citation statements)

References 7 publications

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“…Therefore, this component indicates the wind intensity or aeolian activities. The coarse sand component (>418 μm) is alluvial–diluvial sand from the edge of the Tengger Desert and is transported to the lake area by temporary floods triggered by heavy rainfall in mountainous areas (Tsoar and Pye, 1987; Huang et al, 2008; Yin et al, 2009; Dietze et al, 2014; Z.J. Li et al, 2014; Jiang et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

A prolonged dry Mid-Holocene recorded by Moon Lake in the Tengger Desert, arid and semiarid China

Duan,

An,

Wang

et al. 2024

Quat. res.

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Reconstructing the Mid-Holocene climate change in arid and semiarid areas can help predict regional moisture availability and resultant lake evolution and vegetation changes due to future warming. Here, we present a sediment core (YLH15A) from Moon Lake in the Tengger Desert, arid and semiarid China. Based on robust accelerator mass spectrometry 14C dating and multiproxy analyses (pollen, grain size, elements, and total organic carbon), we reconstructed regional climate changes since 7.6 cal ka BP. The climate was generally dry from 7.6 to 2.8 cal ka BP, as indicated by the dried-up lake, strong aeolian activities, and no vegetation, except for a short-term wet interval between 5.4 and 4.9 cal ka BP. The generally dry climate shifted after 2.8 cal ka BP, which is suggested by expanded steppe desert/steppe and increased vegetation cover; it was also accompanied by lake development, which was likely related to increased groundwater recharge originating from regional precipitation and temporary floods from adjacent mountain areas. Our results reveal a prolonged dry Mid-Holocene and relatively wet Late Holocene that are basically consistent with climatic records from the central–east Asian arid and hyperarid areas. The prolonged dry climate in the arid and hyperarid areas is likely to be related to high evaporation triggered by high temperatures during the Middle Holocene.

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Section: Discussionmentioning

confidence: 99%

A prolonged dry Mid-Holocene recorded by Moon Lake in the Tengger Desert, arid and semiarid China

Duan,

An,

Wang

et al. 2024

Quat. res.

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“…1880 AD within the sedimentary record of Tiewaike Lake, which is relatively close to Kanas Lake. By estimating grain-size parameters in the sediments of Bosten Lake, Huang et al (2008) suggested that flood events might have also occurred in those two periods in Bosten Lake of the southern Tianshan Mountains. Similar events might have been also recorded by the sediments in Balkhash Lake in the western Tianshan Mountains during ca.…”

Section: Discussionmentioning

confidence: 99%

Extreme Flood Events over the Past 300 Years Inferred from Lake Sedimentary Grain Sizes in the Altay Mountains, Northwestern China

Zhou

Zeng

2018

Chin. Geogr. Sci.

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Understanding the temporal variations of extreme floods that occur in response to climate change is essential to anticipate the trends in flood magnitude and frequency in the context of global warming. However, long-term records of paleofloods in arid regions are scarce, thus preventing a thorough understanding of such events. In this study, a reconstruction of paleofloods over the past 300 years was conducted through an analysis of grain sizes from the sediments of Kanas Lake in the Altay Mountains of northwestern China. Results showed that grain parameters and frequency distributions can be used to infer possible abrupt environmental events within the lake sedimentary sequence, and two extreme flood events corresponding to ca. 1736-1765 AD and ca. 1890 AD were further identified based on canonical discriminant analysis (CDA) and coarse percentile versus median grain size (C-M) pattern analysis, both of which occurred during warmer and wetter climate conditions by referring to tree-ring records. These two flood events are also evidenced by lake sedimentary records in the Altay and Tianshan mountains. Furthermore, through a comparison with other records, the flood event from ca. 1736-1765 AD in the study region seems to have occurred in both the arid central Asia and the Alps in Europe, and thus may have been associated with changes in the North Atlantic Oscillation (NAO) index.

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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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Primary study on the environmental significances of grain-size changes of the Lake Bosten sediments

Cited by 6 publications

References 7 publications

A prolonged dry Mid-Holocene recorded by Moon Lake in the Tengger Desert, arid and semiarid China

A prolonged dry Mid-Holocene recorded by Moon Lake in the Tengger Desert, arid and semiarid China

Extreme Flood Events over the Past 300 Years Inferred from Lake Sedimentary Grain Sizes in the Altay Mountains, Northwestern China

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

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