The influence of climate, hydrology and permafrost on holocene peat accumulation at 3500 m on the eastern Qinghai-Tibetan plateau
International audience Peatland of the eastern QinghaiTibetan Plateau lies at the convergence of the East Asian and Indian monsoon systems in eastern Asia. To understand the evolution of this peatland and its potential to provide new insights into the Holocene evolution of the East Asian monsoon a...
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-00553846 https://doi.org/10.1016/j.quascirev.2009.09.006 |
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ftinsu:oai:HAL:insu-00553846v1 2023-06-18T03:42:36+02:00 The influence of climate, hydrology and permafrost on holocene peat accumulation at 3500 m on the eastern Qinghai-Tibetan plateau Large, D.J. Spiro, B. Ferrat, M. Shopland, M. Gallagher, Kerry Al., Et Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre Armoricain de Recherches en Environnement-Centre National de la Recherche Scientifique (CNRS) 2009 https://hal-insu.archives-ouvertes.fr/insu-00553846 https://doi.org/10.1016/j.quascirev.2009.09.006 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2009.09.006 insu-00553846 https://hal-insu.archives-ouvertes.fr/insu-00553846 doi:10.1016/j.quascirev.2009.09.006 ISSN: 0277-3791 Quaternary Science Reviews https://hal-insu.archives-ouvertes.fr/insu-00553846 Quaternary Science Reviews, 2009, 28 (27-28), pp.3303-3314. ⟨10.1016/j.quascirev.2009.09.006⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2009 ftinsu https://doi.org/10.1016/j.quascirev.2009.09.006 2023-06-05T19:10:59Z International audience Peatland of the eastern QinghaiTibetan Plateau lies at the convergence of the East Asian and Indian monsoon systems in eastern Asia. To understand the evolution of this peatland and its potential to provide new insights into the Holocene evolution of the East Asian monsoon a 6 m peat core was collected from the undisturbed central part of a peat deposit near Hongyuan. The age-depth profile was determined using 16 14C-AMS age dates, the peat analysed for a range of environmental variables including carbon, nitrogen and hydrogen concentration, bulk density, d13C and the associated spring water analysed for hydrogen and oxygen isotopes. The age-depth profile of the recovered peat sequence covers the period from 9.6 to 0.3 kyr BP and is linear indicating that the conditions governing productivity and decay varied little over the Holocene. Using changes in carbon density, organic carbon content and its d13C, cold dry periods of permafrost characterised by low density and impeded surface drainage were identified. The low d18O and dD values of the spring water emanating around the peat deposit, down to -13.8 and -102 (VSMOW), respectively, with an inverse relationship between electrical conductivity and isotopic composition indicate precipitation under colder and drier conditions relative to the present day. In view of the current annual mean air temperature of 1 °C this suggests conditions in the past have been conducive to permafrost. Inferred periods of permafrost correspond to independently recognised cold periods in other Holocene records from across China at 8.6, 8.27.8, 5.64.2, 3.1 and 1.81.5 kyr BP. The transition to a cold dry climate appears to be more rapid than the subsequent recovery and cold dry periods at Hongyuan are of longer duration than equivalent cold dry periods over central and eastern China. Lightdark banding peat on a scale of 1530 years from 9.6 to 5.5 kyr BP may indicate a strong influence of decadal oscillations possibly the Pacific Decadal Oscillation and a ... Article in Journal/Newspaper Peat permafrost Institut national des sciences de l'Univers: HAL-INSU Indian Pacific Quaternary Science Reviews 28 27-28 3303 3314 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology [SDE.MCG]Environmental Sciences/Global Changes Large, D.J. Spiro, B. Ferrat, M. Shopland, M. Gallagher, Kerry Al., Et The influence of climate, hydrology and permafrost on holocene peat accumulation at 3500 m on the eastern Qinghai-Tibetan plateau |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Peatland of the eastern QinghaiTibetan Plateau lies at the convergence of the East Asian and Indian monsoon systems in eastern Asia. To understand the evolution of this peatland and its potential to provide new insights into the Holocene evolution of the East Asian monsoon a 6 m peat core was collected from the undisturbed central part of a peat deposit near Hongyuan. The age-depth profile was determined using 16 14C-AMS age dates, the peat analysed for a range of environmental variables including carbon, nitrogen and hydrogen concentration, bulk density, d13C and the associated spring water analysed for hydrogen and oxygen isotopes. The age-depth profile of the recovered peat sequence covers the period from 9.6 to 0.3 kyr BP and is linear indicating that the conditions governing productivity and decay varied little over the Holocene. Using changes in carbon density, organic carbon content and its d13C, cold dry periods of permafrost characterised by low density and impeded surface drainage were identified. The low d18O and dD values of the spring water emanating around the peat deposit, down to -13.8 and -102 (VSMOW), respectively, with an inverse relationship between electrical conductivity and isotopic composition indicate precipitation under colder and drier conditions relative to the present day. In view of the current annual mean air temperature of 1 °C this suggests conditions in the past have been conducive to permafrost. Inferred periods of permafrost correspond to independently recognised cold periods in other Holocene records from across China at 8.6, 8.27.8, 5.64.2, 3.1 and 1.81.5 kyr BP. The transition to a cold dry climate appears to be more rapid than the subsequent recovery and cold dry periods at Hongyuan are of longer duration than equivalent cold dry periods over central and eastern China. Lightdark banding peat on a scale of 1530 years from 9.6 to 5.5 kyr BP may indicate a strong influence of decadal oscillations possibly the Pacific Decadal Oscillation and a ... |
author2 |
Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre Armoricain de Recherches en Environnement-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Large, D.J. Spiro, B. Ferrat, M. Shopland, M. Gallagher, Kerry Al., Et |
author_facet |
Large, D.J. Spiro, B. Ferrat, M. Shopland, M. Gallagher, Kerry Al., Et |
author_sort |
Large, D.J. |
title |
The influence of climate, hydrology and permafrost on holocene peat accumulation at 3500 m on the eastern Qinghai-Tibetan plateau |
title_short |
The influence of climate, hydrology and permafrost on holocene peat accumulation at 3500 m on the eastern Qinghai-Tibetan plateau |
title_full |
The influence of climate, hydrology and permafrost on holocene peat accumulation at 3500 m on the eastern Qinghai-Tibetan plateau |
title_fullStr |
The influence of climate, hydrology and permafrost on holocene peat accumulation at 3500 m on the eastern Qinghai-Tibetan plateau |
title_full_unstemmed |
The influence of climate, hydrology and permafrost on holocene peat accumulation at 3500 m on the eastern Qinghai-Tibetan plateau |
title_sort |
influence of climate, hydrology and permafrost on holocene peat accumulation at 3500 m on the eastern qinghai-tibetan plateau |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00553846 https://doi.org/10.1016/j.quascirev.2009.09.006 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
Peat permafrost |
genre_facet |
Peat permafrost |
op_source |
ISSN: 0277-3791 Quaternary Science Reviews https://hal-insu.archives-ouvertes.fr/insu-00553846 Quaternary Science Reviews, 2009, 28 (27-28), pp.3303-3314. ⟨10.1016/j.quascirev.2009.09.006⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2009.09.006 insu-00553846 https://hal-insu.archives-ouvertes.fr/insu-00553846 doi:10.1016/j.quascirev.2009.09.006 |
op_doi |
https://doi.org/10.1016/j.quascirev.2009.09.006 |
container_title |
Quaternary Science Reviews |
container_volume |
28 |
container_issue |
27-28 |
container_start_page |
3303 |
op_container_end_page |
3314 |
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1769008591808757760 |