Climate changes recorded by Hani Peat in Northeast China over the past 13.8 cal ka BP
The Hani peatland is one of the few that remain well-preserved in northeast China, which makes it a valuable site for paleoclimate research. Here, two sediment cores, which cover the past 13.8 ka, were collected, and loss on Ignition (LOI 550°C ) and X-ray Fluorescence Scanning (XRF) were carried ou...
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ftcopernicus:oai:publications.copernicus.org:cpd74931 2023-05-15T17:31:21+02:00 Climate changes recorded by Hani Peat in Northeast China over the past 13.8 cal ka BP Shi, Ge Yan, Hong Zhang, Wenchao Fei, Haobai Cao, Shuanshuan Ma, Xiaolin Liu, Chengcheng Lu, Fengyan Dodson, John Heijnis, Henk Zhou, Weijian An, Zhisheng 2019-03-14 application/pdf https://doi.org/10.5194/cp-2019-28 https://cp.copernicus.org/preprints/cp-2019-28/ eng eng doi:10.5194/cp-2019-28 https://cp.copernicus.org/preprints/cp-2019-28/ eISSN: 1814-9332 Text 2019 ftcopernicus https://doi.org/10.5194/cp-2019-28 2020-07-20T16:22:54Z The Hani peatland is one of the few that remain well-preserved in northeast China, which makes it a valuable site for paleoclimate research. Here, two sediment cores, which cover the past 13.8 ka, were collected, and loss on Ignition (LOI 550°C ) and X-ray Fluorescence Scanning (XRF) were carried out to build organic matter content and Rb/Sr ratio profiles, in order to assess the climate changes and associated East Asian Summer Monsoon (EASM) evolution since the last deglaciation. The results show that organic content and the chemical weathering index increased from the early to mid Holocene, possibly reflecting increased precipitation and an enhanced EASM. During the mid to late Holocene, the organic content and the chemical weathering index values decreased, implying that the EASM weakened. The variations of monsoon intensity during the Holocene derived from the Hani peat are consistent with the EASM reconstructions from the Gonghai, Daihai, Qinghai Lake, Hexiazi Island and the Yulin loess-paleosol section. Thus the Hani and other published EASM records from northern China demonstrate that the evolution of EASM during the Holocene was likely to be dominated by the combination of the influences from changing solar insolation and northern hemisphere ice volumes. In addition, a 0.5–2 ka band filtering analysis of LOI 550°C data show that millennial scale climate changes in northeast China were teleconnected with the North Atlantic ice-rafted debris and solar irradiance records, indicating that both North Atlantic climate changes and solar activity probably affected EASM variations. Text North Atlantic Copernicus Publications: E-Journals Hani ENVELOPE(-20.331,-20.331,63.441,63.441) |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The Hani peatland is one of the few that remain well-preserved in northeast China, which makes it a valuable site for paleoclimate research. Here, two sediment cores, which cover the past 13.8 ka, were collected, and loss on Ignition (LOI 550°C ) and X-ray Fluorescence Scanning (XRF) were carried out to build organic matter content and Rb/Sr ratio profiles, in order to assess the climate changes and associated East Asian Summer Monsoon (EASM) evolution since the last deglaciation. The results show that organic content and the chemical weathering index increased from the early to mid Holocene, possibly reflecting increased precipitation and an enhanced EASM. During the mid to late Holocene, the organic content and the chemical weathering index values decreased, implying that the EASM weakened. The variations of monsoon intensity during the Holocene derived from the Hani peat are consistent with the EASM reconstructions from the Gonghai, Daihai, Qinghai Lake, Hexiazi Island and the Yulin loess-paleosol section. Thus the Hani and other published EASM records from northern China demonstrate that the evolution of EASM during the Holocene was likely to be dominated by the combination of the influences from changing solar insolation and northern hemisphere ice volumes. In addition, a 0.5–2 ka band filtering analysis of LOI 550°C data show that millennial scale climate changes in northeast China were teleconnected with the North Atlantic ice-rafted debris and solar irradiance records, indicating that both North Atlantic climate changes and solar activity probably affected EASM variations. |
format |
Text |
author |
Shi, Ge Yan, Hong Zhang, Wenchao Fei, Haobai Cao, Shuanshuan Ma, Xiaolin Liu, Chengcheng Lu, Fengyan Dodson, John Heijnis, Henk Zhou, Weijian An, Zhisheng |
spellingShingle |
Shi, Ge Yan, Hong Zhang, Wenchao Fei, Haobai Cao, Shuanshuan Ma, Xiaolin Liu, Chengcheng Lu, Fengyan Dodson, John Heijnis, Henk Zhou, Weijian An, Zhisheng Climate changes recorded by Hani Peat in Northeast China over the past 13.8 cal ka BP |
author_facet |
Shi, Ge Yan, Hong Zhang, Wenchao Fei, Haobai Cao, Shuanshuan Ma, Xiaolin Liu, Chengcheng Lu, Fengyan Dodson, John Heijnis, Henk Zhou, Weijian An, Zhisheng |
author_sort |
Shi, Ge |
title |
Climate changes recorded by Hani Peat in Northeast China over the past 13.8 cal ka BP |
title_short |
Climate changes recorded by Hani Peat in Northeast China over the past 13.8 cal ka BP |
title_full |
Climate changes recorded by Hani Peat in Northeast China over the past 13.8 cal ka BP |
title_fullStr |
Climate changes recorded by Hani Peat in Northeast China over the past 13.8 cal ka BP |
title_full_unstemmed |
Climate changes recorded by Hani Peat in Northeast China over the past 13.8 cal ka BP |
title_sort |
climate changes recorded by hani peat in northeast china over the past 13.8 cal ka bp |
publishDate |
2019 |
url |
https://doi.org/10.5194/cp-2019-28 https://cp.copernicus.org/preprints/cp-2019-28/ |
long_lat |
ENVELOPE(-20.331,-20.331,63.441,63.441) |
geographic |
Hani |
geographic_facet |
Hani |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-2019-28 https://cp.copernicus.org/preprints/cp-2019-28/ |
op_doi |
https://doi.org/10.5194/cp-2019-28 |
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1766128879420833792 |