Flooding history of Lake Nakaumi, western Japan, inferred from sediment records spanning the past 700 years

Ota, Yutaka; Kawahata, Hodaka; Sato, Takaharu; Seto, Kazuto

doi:10.1002/jqs.2982

Cited by 7 publications

(6 citation statements)

References 46 publications

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“…MS values can reflect relative changes in authigenic and terrestrial components, and increased erosion effects can lead to higher MS values (Dasilva et al, 2009; Støren et al, 2010). C/N ratios in lake sediments can be applied to identify organic matter sources, and higher C/N ratios suggest increased contributions from terrestrial sources (Ota et al, 2017; Pompeani et al, 2020). Here, we suggest that the proportion of coarse particles increased, which represented an increase in runoff and rainfall in the watershed and higher lake water levels.…”

Section: Discussionmentioning

confidence: 99%

“…Lake sediments preserve continuous, integrated and high‐resolution records of past environmental changes in the catchment, which can be regarded as a reliable indicator of palaeoenvironmental change in the catchment (Chiverrell et al, 2019; Enzel et al, 1999; Lehnherr et al, 2018; O'Reilly et al, 2003). Studies have shown that changes in sedimentary particle size spectra, geochemistry and magnetic characteristics can provide evidence of past floods and environmental changes (Albrecher et al, 2019; Arnaud et al, 2016; Chen et al, 2017; Enzel et al, 1999; Ota et al, 2017; Støren et al, 2010). For example, Zhao et al (2015) used high‐resolution pollen and grain‐size records from Balikun Lake to reconstruct the history of water level fluctuations and climate change during MIS2 in the eastern region of the Tianshan Mountains, Central Asia.…”

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: Discussionmentioning

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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“…The sand fraction (> 63 µm) is also found in modern river sediments although the percentage is typically low. A single extreme rain event under an arid climate could lead to an abrupt sand fraction increase (Ding et al, 2005;Liu et al, 2016;Ota et al, 2017;Zhou et al, 2018). Therefore, the sand fraction is mainly transported by winds and any peak or abnormal increase of the coarse grain size (especially the sand fraction) is likely related to flood events.…”

Section: Patterns and Interpretation Of The Proxiesmentioning

confidence: 99%

Palynological evidence reveals an arid early Holocene for the northeast Tibetan Plateau

et al. 2022

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Abstract. Situated within the triangle of the East Asian monsoon, the Indian monsoon, and the westerlies, the Holocene patterns of climate and vegetation changes on the northeast Tibetan Plateau are still unclear or even contradictory. By investigating the distribution of modern pollen taxa on the east Tibetan Plateau, we infer the past vegetation and climate since 14.2 ka BP (1000 years before present) from a fossil pollen record extracted from Gahai Lake (102.3133∘ E, 34.2398∘ N; 3444 m a.s.l.) together with multiple proxies (grain size, contents of total organic carbon and total nitrogen) on the northeast Tibetan Plateau. Results indicate that the Gahai Basin was covered by arid alpine steppe or even desert between 14.2 and 7.4 ka BP with dry climatic conditions, and high percentages of arboreal pollen are thought to be long-distance wind- transported grains. Montane forest (dominated by Abies, Picea, and Pinus) migrated into the Gahai Basin between 7.4 and 3.8 ka BP driven by wet and warm climatic conditions (the climate optimum within the Holocene) but reverted to alpine steppe between 3.8 and 2.3 ka BP, indicating a drying climate trend. After 2.3 ka BP, vegetation shifted to alpine meadow represented by increasing abundances of Cyperaceae, which may reflect a cooling climate. The strange pollen spectra with high abundances of Cyperaceae and high total pollen concentrations after ca. 0.24 ka BP (1710 CE) could be an indication of disturbance by human activities to some extent, but needs more direct evidence to be confirmed. Our study confirms the occurrence of a climate optimum in the mid-Holocene on the northeast Tibetan Plateau, which is consistent with climate records from the fringe areas of the East Asian summer monsoon, and provides new insights into the fluctuations in the intensity and extent of the Asian monsoon system.

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“…Therefore, the combined results obtained from the Pearson's Correlation Coefficient and the Principal Component Analysis indicate the association of major and trace elements with detrital materials rather than biogenic components. Harnois 1988) have been widely used to infer intensity of weathering (e.g., Ota et al 2017;Anaya-Gregorio et al 2018;Raza and Mondal 2018;Tawfik et al 2018;Hossain et al 2018;Kettanah et al 2020). However, a few authors (Cullers 2000;Buggle et al 2011;Garzanti et al 2015) documented that sediments are affected by various factors like sorting, recycling, and having significant proportions of carbonate or phosphate minerals.…”

Section: Principal Component Analysis (Pca)mentioning

confidence: 99%

Detrital zircon U–Pb geochronology and geochemistry of the Riachuelos and Palma Sola beach sediments, Veracruz State, Gulf of Mexico: a new insight on palaeoenvironment

Armstrong‐Altrin

2020

J. Palaeogeogr.

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Zircons are abundant in the beach sediments. In this study, surface microtexture, mineralogy, bulk sediment geochemistry, trace element composition and U–Pb isotopic geochronology of detrital zircons collected from the Riachuelos and Palma Sola beach areas, southwestern Gulf of Mexico were performed to infer the sediment provenance and palaeoenvironment. The zircon microtexture was categorized as mechanically- and/or chemically-induced features. The weathering index values for the Riachuelos (~ 72–77) and Palma Sola (~ 71–74) beach sediments indicated moderate weathering of both of the two source areas. The major and trace element data of bulk sediments suggested passive margin settings for the two areas. The trace elemental ratios and chondrite-normalized rare earth element (REE) patterns of bulk sediments revealed that the sediments were likely sourced by felsic and intermediate igneous rocks. And the zircon Th/U ratios (mostly more than 0.2) and zircon REE patterns (with negative Eu and positive Ce anomalies) suggested a magmatic origin for both of the beach sediments from these two areas. Two distinct zircon age peaks respectively belonging to the Paleozoic and the Cenozoic were identified both in the Riachuelos and Palma Sola beach sediments. Zircon geochronology comparison research between the Riachuelos–Palma Sola beach sediments and potential source areas in SW Gulf of Mexico revealed that the source terrane supplied the Paleozoic zircons of this study was identified as the Mesa Central Province (MCP), and the Cenozoic zircons were transported from the nearby Eastern Alkaline Province (EAP). Moreover, although the Precambrian zircons were very few in the studied sediments, their geochronology and geochemistry results still could infer that they were contributed by the source terranes of Grenvillian igneous suites in the Oaxaca and the Chiapas Massif Complexes.

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Flooding history of Lake Nakaumi, western Japan, inferred from sediment records spanning the past 700 years

Cited by 7 publications

References 46 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

Palynological evidence reveals an arid early Holocene for the northeast Tibetan Plateau

Detrital zircon U–Pb geochronology and geochemistry of the Riachuelos and Palma Sola beach sediments, Veracruz State, Gulf of Mexico: a new insight on palaeoenvironment

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