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Richard A. Staff - One of the best experts on this subject based on the ideXlab platform.
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The multiple chronological techniques applied to the Lake Suigetsu SG06 Sediment Core, central Japan : Multiple chronological techniques on the Lake Suigetsu SG06 Sediment Core, Japan
Boreas, 2012Co-Authors: Richard A. Staff, Takeshi Nakagawa, Gordon Schlolaut, Michael H. Marshall, Achim Brauer, Henry F. Lamb, Christopher Bronk Ramsey, Charlotte Bryant, Fiona Brock, Hiroyuki KitagawaAbstract:Staff, R. A., Nakagawa, T., Schlolaut, G., Marshall, M. H., Brauer, A., Lamb, H. F., Bronk Ramsey, C., Bryant, C. L., Brock, F., Kitagawa, H., Van Der Plicht, J., Payne, R. L., Smith, V. C., Mark, D. F., Macleod, A., Blockley, S. P. E., Schwenninger, J., Tarasov, P. E., Haraguchi, T., Gotanda, K., Yonenobu, H., Yokoyama, Y. (2013). The multiple chronological techniques applied to the Lake Suigetsu SG06 Sediment Core, central Japan: Multiple chronological techniques on the Lake Suigetsu SG06 Sediment Core, Japan. Boreas, 42 (2), 259-266.
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sg06 a fully continuous and varved Sediment Core from lake suigetsu japan stratigraphy and potential for improving the radiocarbon calibration model and understanding of late quaternary climate changes
Quaternary Science Reviews, 2012Co-Authors: Takeshi Nakagawa, Achim Brauer, Katsuya Gotanda, Tsuyoshi Haraguchi, Toru Danhara, Hitoshi Yonenobu, Yusuke Yokoyama, Ryuji Tada, Keiji Takemura, Richard A. StaffAbstract:Abstract The high potential of the varved Sediments of Lake Suigetsu, central Japan, to provide a purely terrestrial radiocarbon calibration model and a chronology of palaeoclimatic changes has been widely recognised for the last two decades. However, this potential has not been fully realised since the only available long Sediment Core from the lake (‘SG93’) was extracted from a single bore hole and was therefore interrupted by gaps of unknown duration between successive Core sections. In the summer of 2006, a new Sediment Core (‘SG06’) was recovered from the lake. Four separate boreholes were drilled and the parallel sets of Cores recovered were found to overlap completely, without gaps between segments. This new record provides the ability to test existing atmospheric radiocarbon calibration models, as well as to assess the scale of inter-regional leads and lags in palaeoclimatic changes over the last Glacial–Interglacial cycle. Multi-disciplinary analyses from SG06 are still ongoing, but a reliable description of the Sedimentary sequence needs to be provided to the wider science community before major outputs from the project are released, thereby allowing fully-informed critical evaluation of all subsequent releases of data based on the SG06 record. In this paper, we report key litho-stratigraphic information concerning the SG06 Sediment Core, highlighting changes in the clarity of annual laminations (varves) with depth, and possible implications for the mechanism of the climate change. We also discuss the potential of the SG06 record to meet the fundamental goals of the INQUA-INTIMATE project.
Takeshi Nakagawa - One of the best experts on this subject based on the ideXlab platform.
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The multiple chronological techniques applied to the Lake Suigetsu SG06 Sediment Core, central Japan : Multiple chronological techniques on the Lake Suigetsu SG06 Sediment Core, Japan
Boreas, 2012Co-Authors: Richard A. Staff, Takeshi Nakagawa, Gordon Schlolaut, Michael H. Marshall, Achim Brauer, Henry F. Lamb, Christopher Bronk Ramsey, Charlotte Bryant, Fiona Brock, Hiroyuki KitagawaAbstract:Staff, R. A., Nakagawa, T., Schlolaut, G., Marshall, M. H., Brauer, A., Lamb, H. F., Bronk Ramsey, C., Bryant, C. L., Brock, F., Kitagawa, H., Van Der Plicht, J., Payne, R. L., Smith, V. C., Mark, D. F., Macleod, A., Blockley, S. P. E., Schwenninger, J., Tarasov, P. E., Haraguchi, T., Gotanda, K., Yonenobu, H., Yokoyama, Y. (2013). The multiple chronological techniques applied to the Lake Suigetsu SG06 Sediment Core, central Japan: Multiple chronological techniques on the Lake Suigetsu SG06 Sediment Core, Japan. Boreas, 42 (2), 259-266.
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sg06 a fully continuous and varved Sediment Core from lake suigetsu japan stratigraphy and potential for improving the radiocarbon calibration model and understanding of late quaternary climate changes
Quaternary Science Reviews, 2012Co-Authors: Takeshi Nakagawa, Achim Brauer, Katsuya Gotanda, Tsuyoshi Haraguchi, Toru Danhara, Hitoshi Yonenobu, Yusuke Yokoyama, Ryuji Tada, Keiji Takemura, Richard A. StaffAbstract:Abstract The high potential of the varved Sediments of Lake Suigetsu, central Japan, to provide a purely terrestrial radiocarbon calibration model and a chronology of palaeoclimatic changes has been widely recognised for the last two decades. However, this potential has not been fully realised since the only available long Sediment Core from the lake (‘SG93’) was extracted from a single bore hole and was therefore interrupted by gaps of unknown duration between successive Core sections. In the summer of 2006, a new Sediment Core (‘SG06’) was recovered from the lake. Four separate boreholes were drilled and the parallel sets of Cores recovered were found to overlap completely, without gaps between segments. This new record provides the ability to test existing atmospheric radiocarbon calibration models, as well as to assess the scale of inter-regional leads and lags in palaeoclimatic changes over the last Glacial–Interglacial cycle. Multi-disciplinary analyses from SG06 are still ongoing, but a reliable description of the Sedimentary sequence needs to be provided to the wider science community before major outputs from the project are released, thereby allowing fully-informed critical evaluation of all subsequent releases of data based on the SG06 record. In this paper, we report key litho-stratigraphic information concerning the SG06 Sediment Core, highlighting changes in the clarity of annual laminations (varves) with depth, and possible implications for the mechanism of the climate change. We also discuss the potential of the SG06 record to meet the fundamental goals of the INQUA-INTIMATE project.
Hiroyuki Kitagawa - One of the best experts on this subject based on the ideXlab platform.
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The multiple chronological techniques applied to the Lake Suigetsu SG06 Sediment Core, central Japan : Multiple chronological techniques on the Lake Suigetsu SG06 Sediment Core, Japan
Boreas, 2012Co-Authors: Richard A. Staff, Takeshi Nakagawa, Gordon Schlolaut, Michael H. Marshall, Achim Brauer, Henry F. Lamb, Christopher Bronk Ramsey, Charlotte Bryant, Fiona Brock, Hiroyuki KitagawaAbstract:Staff, R. A., Nakagawa, T., Schlolaut, G., Marshall, M. H., Brauer, A., Lamb, H. F., Bronk Ramsey, C., Bryant, C. L., Brock, F., Kitagawa, H., Van Der Plicht, J., Payne, R. L., Smith, V. C., Mark, D. F., Macleod, A., Blockley, S. P. E., Schwenninger, J., Tarasov, P. E., Haraguchi, T., Gotanda, K., Yonenobu, H., Yokoyama, Y. (2013). The multiple chronological techniques applied to the Lake Suigetsu SG06 Sediment Core, central Japan: Multiple chronological techniques on the Lake Suigetsu SG06 Sediment Core, Japan. Boreas, 42 (2), 259-266.
Achim Brauer - One of the best experts on this subject based on the ideXlab platform.
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The multiple chronological techniques applied to the Lake Suigetsu SG06 Sediment Core, central Japan : Multiple chronological techniques on the Lake Suigetsu SG06 Sediment Core, Japan
Boreas, 2012Co-Authors: Richard A. Staff, Takeshi Nakagawa, Gordon Schlolaut, Michael H. Marshall, Achim Brauer, Henry F. Lamb, Christopher Bronk Ramsey, Charlotte Bryant, Fiona Brock, Hiroyuki KitagawaAbstract:Staff, R. A., Nakagawa, T., Schlolaut, G., Marshall, M. H., Brauer, A., Lamb, H. F., Bronk Ramsey, C., Bryant, C. L., Brock, F., Kitagawa, H., Van Der Plicht, J., Payne, R. L., Smith, V. C., Mark, D. F., Macleod, A., Blockley, S. P. E., Schwenninger, J., Tarasov, P. E., Haraguchi, T., Gotanda, K., Yonenobu, H., Yokoyama, Y. (2013). The multiple chronological techniques applied to the Lake Suigetsu SG06 Sediment Core, central Japan: Multiple chronological techniques on the Lake Suigetsu SG06 Sediment Core, Japan. Boreas, 42 (2), 259-266.
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sg06 a fully continuous and varved Sediment Core from lake suigetsu japan stratigraphy and potential for improving the radiocarbon calibration model and understanding of late quaternary climate changes
Quaternary Science Reviews, 2012Co-Authors: Takeshi Nakagawa, Achim Brauer, Katsuya Gotanda, Tsuyoshi Haraguchi, Toru Danhara, Hitoshi Yonenobu, Yusuke Yokoyama, Ryuji Tada, Keiji Takemura, Richard A. StaffAbstract:Abstract The high potential of the varved Sediments of Lake Suigetsu, central Japan, to provide a purely terrestrial radiocarbon calibration model and a chronology of palaeoclimatic changes has been widely recognised for the last two decades. However, this potential has not been fully realised since the only available long Sediment Core from the lake (‘SG93’) was extracted from a single bore hole and was therefore interrupted by gaps of unknown duration between successive Core sections. In the summer of 2006, a new Sediment Core (‘SG06’) was recovered from the lake. Four separate boreholes were drilled and the parallel sets of Cores recovered were found to overlap completely, without gaps between segments. This new record provides the ability to test existing atmospheric radiocarbon calibration models, as well as to assess the scale of inter-regional leads and lags in palaeoclimatic changes over the last Glacial–Interglacial cycle. Multi-disciplinary analyses from SG06 are still ongoing, but a reliable description of the Sedimentary sequence needs to be provided to the wider science community before major outputs from the project are released, thereby allowing fully-informed critical evaluation of all subsequent releases of data based on the SG06 record. In this paper, we report key litho-stratigraphic information concerning the SG06 Sediment Core, highlighting changes in the clarity of annual laminations (varves) with depth, and possible implications for the mechanism of the climate change. We also discuss the potential of the SG06 record to meet the fundamental goals of the INQUA-INTIMATE project.
Guijian Liu - One of the best experts on this subject based on the ideXlab platform.
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tracking historical mobility behavior and sources of lead in the 59 year Sediment Core from the huaihe river using lead isotopic compositions
Chemosphere, 2017Co-Authors: Guijian Liu, Jie Wang, Houqi Liu, Paul K S LamAbstract:Abstract A historical perspective of past 59 years (1955–2014) for contamination and isotopic composition of Pb in Sediment Core system of the Huaihe River, Huainan City, Anhui Province of China is presented. Detailed investigation regarding changes in Pb sources, enrichment factor, sequential extraction and isotopic analysis revealed that high Pb concentrations were detected along the Core, especially during the first two decades (1955–1974). Large variations in Pb isotopic compositions were observed, with 206 Pb/ 207 Pb and 208 Pb/ 207 Pb values ranging from 1.1504–1.1694, and 2.0817–2.1380, respectively. Diverse Pb sources were identified for Sediment contamination over the time. Among anthropogenic sources, metallurgic dust and leaded petrol were on top during 1955–1974, especially when the Great Leap Forward Movement (1958–1960) was in progress in China, the time numerous small industries were established without wastewater treatment facility. However, coal and coal combustion were recognized as the primary sources of Pb emissions for the recent four decades (1974–2014) due to tremendous increase of coal consumption for power and heat generation. Unleaded vehicle exhaust, waste incineration and industrial emission were also sources of Pb during the years 1974–2014. Our estimates based on geochemical and lead isotopic approaches have shown that anthropogenic Pb contributions varied from 4.35 to 92.01%, and 13.28–99.06%, respectively. Assessment of lead speciation indicated an overwhelming presence of reducible fraction (Fe-Mn hydro-(oxides)) in the Sediment Core, except during 1995–1997, which was thought to be affected by water pollution accidents caused by heavy rainfall.
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a 59 year Sedimentary record of metal pollution in the Sediment Core from the huaihe river huainan anhui china
Environmental Science and Pollution Research, 2016Co-Authors: Guijian Liu, Jie Wang, Jiamei Zhang, Houqi Liu, Paul K S LamAbstract:An approximately 59-year (1955–2014) Sedimentary record of metal elements (Cu, Pb, Zn, Ni, Co, Mn, and Fe) in a Sediment Core, collected from the Huaihe River, Huainan City, Anhui Province, China, was reconstructed by using 210Pb geochronology. Copper, Zn, Ni, Co, and Mn evaluated by enrichment factor (EF) indicated minor contamination due to water pollution accidents of the Huaihe River that occurred in 1990s and 2004. Lead presented the most severe pollution among the metals studied, especially during 1957–1974. The use of leaded petrol and atmospheric deposition of coal combustion flue gases could have contributed to Pb contamination. In spite of the general good quality (mean Sediment pollution index (SPI) 35.69) of the Sediment Core evaluated by SPI based on the principal component analysis, worse Sediment qualities in the upper section (<6 cm, 2004) were still observed, suggesting intensive human activities causing the increasing concentrations of metals in recent decades.
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analysis of hchs and ddts in a Sediment Core from the old yellow river estuary china
Ecotoxicology and Environmental Safety, 2014Co-Authors: Guijian Liu, Zijiao YuanAbstract:Abstract The present study analyzed the distribution of HCHs and DDTs in a Sediment Core from the Old Yellow River Estuary, China. The OCP levels were detected by Soxhlet extraction followed by gas chromatography (GC) using a mass-selective detector. Sediment age was analyzed for 210Pb using an Ortec GWL HPGe gamma spectrometer. The results indicated that the concentrations of ∑DDT in the Sediment Core were much lower than those of ∑HCH. Compared with the other estuarine and coastal regions in Chinese rivers, HCHs levels in this area were higher or similar, while DDTs levels were lower. The compositional analysis indicated that β-HCH and p, p'-DDD were the predominant species. The temporal trends indicated that levels of HCHs and DDTs were related with their historical usage, emission and soil residues. According to the analysis of the ratio, HCHs in this area was mainly due to the technical historical residue and recent lindane. DDTs was mainly due to historical residue. The biodegradation conditions for DDTs were anaerobic. The dicofol-type DDTs application occurred in this area.
