Hydrological and climate changes in southeast Siberia over the last 33 kyr

Katsuta, Nagayoshi; Ikeda, Hisashi; Shibata, Kenji; Saito‐Kokubu, Yoko; Murakami, Takahiro; Tani, Yukinori; Takano, Masao; Nakamura, Toshio; Tanaka, Atsushi; Naito, Sayuri; Ochiai, Shinya; Shichi, Koji; Kawakami, Shin‐ichi; Kawai, Takayoshi

doi:10.1016/j.gloplacha.2018.02.012

Cited by 12 publications

(17 citation statements)

References 92 publications

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“…ka BP, which coincide with the BA and PB interstadials (Figures 3b and 3f) within the uncertainties of the chronologies (<±200 years) (Katsuta et al, 2018). The temporal variations in the U content in Lake Baikal sediments result from change in input from the Selenga drainage basin associated with changes in the rainfall/moisture level (Katsuta et al, 2018;Murakami et al, 2012). The temporal variations in the U content in Lake Baikal sediments result from change in input from the Selenga drainage basin associated with changes in the rainfall/moisture level (Katsuta et al, 2018;Murakami et al, 2012).…”

Section: Correlations With Records Of the Selenga Drainage Basinsupporting

confidence: 74%

“…ka BP, which coincide with the BA and PB interstadials (Figures 3b and 3f) within the uncertainties of the chronologies (<±200 years) (Katsuta et al, 2018). ka BP, which coincide with the BA and PB interstadials (Figures 3b and 3f) within the uncertainties of the chronologies (<±200 years) (Katsuta et al, 2018).…”

Section: Correlations With Records Of the Selenga Drainage Basinsupporting

confidence: 61%

“…S, (d) the TS/TOC ratio, (e) the TOC content, (f) the median grain sizes, (g) X-ray diffraction diagrams of the sediment core HV05-St.2 at~13.7 and~11.0 cal. (low-Mg calcite) content (Katsuta et al, 2017), (e) the Lake Baikal VER99-G12 core Picea content (Shichi et al, 2013), (f) the uranium content (Katsuta et al, 2018), (g) global sea level change (Lambeck et al, 2014), Greenland ice core records of (h) GRIP CH 4 (Blunier et al, 2007, and reference therein), (i) atmospheric CO 2 mixing ratio from Antarctic ice cores (Köhler et al, 2017), and (j) NGRIP δ 18 O (North Greenland Ice Core Project, 2004). C: calcite, P: pyrite, Q: quartz.…”

Section: Source and Process Of Sulfate Delivered To Lake Hovsgolmentioning

confidence: 99%

“…ka BP. The age uncertainties were <400 years for Lake Hovsgol sediment samples (Katsuta et al, 2017) and <200 years for Lake Baikal ones (Katsuta et al, 2018). (h) A plot of TS against TOC in the sediment core.…”

Section: Source and Process Of Sulfate Delivered To Lake Hovsgolmentioning

confidence: 99%

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Siberian Permafrost Thawing Accelerated at the Bølling/Allerød and Preboreal Warm Periods During the Last Deglaciation

Katsuta

Matsumoto

Hase³

et al. 2019

Geophysical Research Letters

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This study investigated a continuous sediment core, retrieved from the deepest part in Lake Hovsgol, northwestern Mongolia. Its surrounds are occupied by a continuous Siberian permafrost zone. Distinct geochemical and lithological features suggest that the watershed soil was moistened during the last deglaciation, associated with climate amelioration. Especially, the calcareous glacial clay layers (ca 13.7 and ca 11.0 cal. ka BP), with high sulfur content peaks and positive shifts of δ 34 S values, well correlate with the timing of meltwater pulses 1A and 1B, leading to rapid warming such as Bølling/Allerød and Preboreal Holocene, respectively. This finding allows our interpretation for the calcareous glacial clay layers produced by landslide-induced debris flow, which resulted from intensive water discharge from rapid thawing of permafrost during the abrupt warming periods. Our correlation with Lake Baikal records suggests that these permafrost thawings have accelerated over the area of the Selenga drainage basin (continental interior Eurasia).

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Section: Correlations With Records Of the Selenga Drainage Basinsupporting

confidence: 74%

Section: Correlations With Records Of the Selenga Drainage Basinsupporting

confidence: 61%

Section: Source and Process Of Sulfate Delivered To Lake Hovsgolmentioning

confidence: 99%

Section: Source and Process Of Sulfate Delivered To Lake Hovsgolmentioning

confidence: 99%

See 2 more Smart Citations

Siberian Permafrost Thawing Accelerated at the Bølling/Allerød and Preboreal Warm Periods During the Last Deglaciation

Katsuta

Matsumoto

Hase³

et al. 2019

Geophysical Research Letters

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“…B), occur as event layers (see fig. 6C in Katsuta et al ., ). Sulphur peaks are attributable mostly to pyrite, occurring in spots (see fig.…”

Section: Results and Assessmentmentioning

confidence: 99%

Quantitative micro‐X‐ray fluorescence scanning spectroscopy of wet sediment based on the X‐ray absorption and emission theories: Its application to freshwater lake sedimentary sequences

et al. 2019

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Micro‐X‐ray fluorescence scanning spectroscopy of marine and lake sedimentary sequences can provide detailed palaeoenvironmental records through element intensity proxy data. However, problems with the effects of interstitial pore water on the micro‐X‐ray fluorescence intensities have been pointed out. This is because the X‐ray fluorescence intensities are measured directly at the surfaces of split wet sediment core samples. This study developed a new method for correcting X‐ray fluorescence data to compensate for the effects of pore water using a scanning X‐ray analytical microscope. This involved simultaneous use of micro‐X‐ray fluorescence scanning spectroscopy and an X‐ray transmission detector. To evaluate the interstitial pore water content from the X‐ray transmission intensities, a fine‐grained sediment core retrieved from Lake Baikal (VER99‐G12) was used to prepare resin‐embedded samples with smooth surfaces and uniform thickness. Simple linear regression between the linear absorption coefficients of the samples and their porosity, based on the Lambert–Beer law, enabled calculation of the interstitial pore spaces and their resin content with high reproducibility. The X‐ray fluorescence intensities of resin‐embedded samples were reduced compared with those of dry sediment samples because of: (i) the X‐ray fluorescence absorption of resin within sediment; and (ii) the sediment dilution effects by resin. An improved micro‐X‐ray fluorescence correction equation based on X‐ray fluorescence emission theory considers the instrument's sensitivity to each element, which provides a reasonable explanation of these two effects. The resin‐corrected X‐ray fluorescence intensity was then successfully converted to elemental concentrations using simple linear regression between the data from micro‐X‐ray fluorescence scanning spectroscopy and from the conventional analyzer. In particular, the calculated concentration of SiO2 over the depth of the core, reflecting diatom/biogenic silica concentration, was significantly changed by the calibrations, from a progressively decreasing trend to an increasing trend towards the top of the core.

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Late Quaternary environmental change record in biomarker lipid compositions of Lake Ebinur sediments, Northwestern China

Zhou

et al. 2019

Int J Earth Sci (Geol Rundsch)

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Hydrological and climate changes in southeast Siberia over the last 33 kyr

Cited by 12 publications

References 92 publications

Siberian Permafrost Thawing Accelerated at the Bølling/Allerød and Preboreal Warm Periods During the Last Deglaciation

Siberian Permafrost Thawing Accelerated at the Bølling/Allerød and Preboreal Warm Periods During the Last Deglaciation

Quantitative micro‐X‐ray fluorescence scanning spectroscopy of wet sediment based on the X‐ray absorption and emission theories: Its application to freshwater lake sedimentary sequences

Late Quaternary environmental change record in biomarker lipid compositions of Lake Ebinur sediments, Northwestern China

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Hydrological and climate changes in southeast Siberia over the last 33 kyr

Cited by 12 publications

References 92 publications

Siberian Permafrost Thawing Accelerated at the Bølling/Allerød and Preboreal Warm Periods During the Last Deglaciation

Siberian Permafrost Thawing Accelerated at the Bølling/Allerød and Preboreal Warm Periods During the Last Deglaciation

Quantitative micro‐X‐ray fluorescence scanning spectroscopy of wet sediment based on the X‐ray absorption and emission theories: Its application to freshwater lake sedimentary sequences

Late Quaternary environmental change record in biomarker lipid compositions of Lake Ebinur sediments, Northwestern China

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Hydrological and climate changes in southeast Siberia over the last 33 kyr