Cryogenic wedges and cryoturbations on the Ordos Plateau in North China since 50 ka BP and their paleoenvironmental implications
Abstract During the last 50 ka, cryogenic wedges on the Ordos Plateau formed during three major periods: (i) early local Last Glaciation, ca. 50 ka BP; (iii) local Last Permafrost Maximum(local LPM), 25–19 ka BP; and (v) post‐local LPM, 16–9 ka BP. Cryoturbations mainly formed in the following perio...
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crwiley:10.1002/ppp.2084 2024-09-30T14:41:12+00:00 Cryogenic wedges and cryoturbations on the Ordos Plateau in North China since 50 ka BP and their paleoenvironmental implications He, Ruixia Jin, Huijun French, Hugh M. Vandenberghe, Jef Li, Xiaoying Li, Fang Jiang, Guanli Zhang, Ze Chen, Xuemei Serban, Raul D. Wang, Shaoling Guo, Dongxin National Natural Science Foundation of China 2020 http://dx.doi.org/10.1002/ppp.2084 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2084 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2084 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 32, issue 2, page 231-247 ISSN 1045-6740 1099-1530 journal-article 2020 crwiley https://doi.org/10.1002/ppp.2084 2024-09-05T05:03:27Z Abstract During the last 50 ka, cryogenic wedges on the Ordos Plateau formed during three major periods: (i) early local Last Glaciation, ca. 50 ka BP; (iii) local Last Permafrost Maximum(local LPM), 25–19 ka BP; and (v) post‐local LPM, 16–9 ka BP. Cryoturbations mainly formed in the following periods: (ii) pre‐local LPM, 45–30 ka BP and (iv) ~ 20 ka BP. The coldest periods with well‐developed permafrost (i and iii) were most conducive for forming cryogenic wedges. The following periods of warming climate and degrading permafrost favored the formation of cryoturbations. During the local LPM, sand wedges and polygons were well developed and widely distributed on the Ordos Plateau when mean annual air temperatures (MAATs) were approximately 12°C lower than that at present. At ~30 ka BP, MAAT was 6–7°C lower than that at present. Paleoclimate conditions on the Ordos Plateau were reconstructed since 50 ka BP as follows: cold (ca. 50 ka BP) → cool (45–30 ka BP) → very cold (25–19 ka BP) → cool (19–9 ka BP) → intermittent warming until the present day. The amount of precipitation fluctuated, but with a general trend of drying since 50 ka BP. Under the next generally warming climate (after 9 ka BP), permafrost gradually degraded and eventually disappeared from the Ordos Plateau. Article in Journal/Newspaper permafrost Permafrost and Periglacial Processes wedge* Wiley Online Library Permafrost and Periglacial Processes 32 2 231 247 |
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English |
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Abstract During the last 50 ka, cryogenic wedges on the Ordos Plateau formed during three major periods: (i) early local Last Glaciation, ca. 50 ka BP; (iii) local Last Permafrost Maximum(local LPM), 25–19 ka BP; and (v) post‐local LPM, 16–9 ka BP. Cryoturbations mainly formed in the following periods: (ii) pre‐local LPM, 45–30 ka BP and (iv) ~ 20 ka BP. The coldest periods with well‐developed permafrost (i and iii) were most conducive for forming cryogenic wedges. The following periods of warming climate and degrading permafrost favored the formation of cryoturbations. During the local LPM, sand wedges and polygons were well developed and widely distributed on the Ordos Plateau when mean annual air temperatures (MAATs) were approximately 12°C lower than that at present. At ~30 ka BP, MAAT was 6–7°C lower than that at present. Paleoclimate conditions on the Ordos Plateau were reconstructed since 50 ka BP as follows: cold (ca. 50 ka BP) → cool (45–30 ka BP) → very cold (25–19 ka BP) → cool (19–9 ka BP) → intermittent warming until the present day. The amount of precipitation fluctuated, but with a general trend of drying since 50 ka BP. Under the next generally warming climate (after 9 ka BP), permafrost gradually degraded and eventually disappeared from the Ordos Plateau. |
author2 |
National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
He, Ruixia Jin, Huijun French, Hugh M. Vandenberghe, Jef Li, Xiaoying Li, Fang Jiang, Guanli Zhang, Ze Chen, Xuemei Serban, Raul D. Wang, Shaoling Guo, Dongxin |
spellingShingle |
He, Ruixia Jin, Huijun French, Hugh M. Vandenberghe, Jef Li, Xiaoying Li, Fang Jiang, Guanli Zhang, Ze Chen, Xuemei Serban, Raul D. Wang, Shaoling Guo, Dongxin Cryogenic wedges and cryoturbations on the Ordos Plateau in North China since 50 ka BP and their paleoenvironmental implications |
author_facet |
He, Ruixia Jin, Huijun French, Hugh M. Vandenberghe, Jef Li, Xiaoying Li, Fang Jiang, Guanli Zhang, Ze Chen, Xuemei Serban, Raul D. Wang, Shaoling Guo, Dongxin |
author_sort |
He, Ruixia |
title |
Cryogenic wedges and cryoturbations on the Ordos Plateau in North China since 50 ka BP and their paleoenvironmental implications |
title_short |
Cryogenic wedges and cryoturbations on the Ordos Plateau in North China since 50 ka BP and their paleoenvironmental implications |
title_full |
Cryogenic wedges and cryoturbations on the Ordos Plateau in North China since 50 ka BP and their paleoenvironmental implications |
title_fullStr |
Cryogenic wedges and cryoturbations on the Ordos Plateau in North China since 50 ka BP and their paleoenvironmental implications |
title_full_unstemmed |
Cryogenic wedges and cryoturbations on the Ordos Plateau in North China since 50 ka BP and their paleoenvironmental implications |
title_sort |
cryogenic wedges and cryoturbations on the ordos plateau in north china since 50 ka bp and their paleoenvironmental implications |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/ppp.2084 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2084 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2084 |
genre |
permafrost Permafrost and Periglacial Processes wedge* |
genre_facet |
permafrost Permafrost and Periglacial Processes wedge* |
op_source |
Permafrost and Periglacial Processes volume 32, issue 2, page 231-247 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.2084 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
32 |
container_issue |
2 |
container_start_page |
231 |
op_container_end_page |
247 |
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1811643629186318336 |