气候变化领域集成服务门户(CCPortal): Evolution of permafrost in China during the last 20 ka

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DOI	10.1007/s11430-018-9272-0
	Evolution of permafrost in China during the last 20 ka
	Jin, Huijun; Jin, Xiaoying; He, Ruixia; Luo, Dongliang; Chang, Xiaoli; Wang, Shaoling; Marchenko, Sergey S.; Yang, Sizhong; Yi, Chaolu; Li, Shijie; Harris, Stuart A.
通讯作者	Jin, HJ (通讯作者)
发表日期	2019
ISSN	1674-7313
EISSN	1869-1897
起始页码	1207
结束页码	1223
卷号	62 期号:8
英文摘要	The formation and evolution of permafrost in China during the last 20 ka were reconstructed on the basis of large amount of paleo-permafrost remains and paleo-periglacial evidence, as well as paleo-glacial landforms, paleo-flora and paleofauna records. The results indicate that, during the local Last Glacial Maximum (LLGM) or local Last Permafrost Maximum (LLPMax), the extent of permafrost of China reached 5.3x10(6)-5.4x10(6) km(2), or thrice that of today, but permafrost shrank to only 0.80x10(6)-0.85x10(6) km(2), or 50% that of present, during the local Holocene Megathermal Period (LHMP), or the local Last Permafrost Minimum (LLPMin). On the basis of the dating of periglacial remains and their distributive features, the extent of permafrost in China was delineated for the two periods of LLGM (LLPMax) and LHMP (LLPMin), and the evolution of permafrost in China was divided into seven periods as follows: (1) LLGM in Late Pleistocene (ca. 20000 to 13000-10800 a BP) with extensive evidence for the presence of intensive ice-wedge expansion for outlining its LLPMax extent; (2) A period of dramatically changing climate during the early Holocene (10800 to 8500-7000 a BP) when permafrost remained relatively stable but with a general trend of shrinking areal extent; (3) The LHMP in the Mid-Holocene (8500-7000 to 4000-3000 a BP) when permafrost degraded intensively and extensively, and shrank to the LLPMin; (4) Neoglaciation during the late Holocene (4000-3000 to 1000 a BP, when permafrost again expanded; (5) Medieval Warming Period (MWP) in the late Holocene (1000-500 a BP) when permafrost was in a relative decline; (6) Little Ice Age (LIA) in the late Holocene (500-100 a BP), when permafrost relatively expanded, and; (7) Recent warming (during the 20th century), when permafrost continuously degraded and still is degrading. The paleo-climate, geography and paleopermafrost extents and other features were reconstructed for each of these seven periods.
关键词	GLACIAL MAXIMUM TIBETAN PLATEAU NORTHEAST CHINA ROCK GLACIERS MOUNTAINS CLIMATE DEGRADATION PLEISTOCENE SIMULATION NETWORKS
英文关键词	Permafrost evolution; Cryogenic wedge structures; Local Last Glacial Maximum (LLGM); Local Holocene Megathermal Period (LHMP); China
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000472529900003
来源期刊	SCIENCE CHINA-EARTH SCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259641
推荐引用方式 GB/T 7714	Jin, Huijun,Jin, Xiaoying,He, Ruixia,et al. Evolution of permafrost in China during the last 20 ka[J]. 中国科学院青藏高原研究所,2019,62(8).
APA	Jin, Huijun.,Jin, Xiaoying.,He, Ruixia.,Luo, Dongliang.,Chang, Xiaoli.,...&Harris, Stuart A..(2019).Evolution of permafrost in China during the last 20 ka.SCIENCE CHINA-EARTH SCIENCES,62(8).
MLA	Jin, Huijun,et al."Evolution of permafrost in China during the last 20 ka".SCIENCE CHINA-EARTH SCIENCES 62.8(2019).