干旱区生态环境知识资源中心(Arid): Climate History of Southern Mongolia Since 17 ka: The Ostracod, Gastropod and Charophyte Record From Lake Ulaan

Arid

DOI	10.3389/feart.2020.00221
	Climate History of Southern Mongolia Since 17 ka: The Ostracod, Gastropod and Charophyte Record From Lake Ulaan
	Mischke, Steffen 1; Lee, Min Kyung 2; Lee, Yong Il 3
通讯作者	Mischke, Steffen
来源期刊	FRONTIERS IN EARTH SCIENCE
EISSN	2296-6463
出版年	2020
卷号	8
英文摘要	Late glacial and Holocene environmental and climate change in the Gobi Desert is poorly understood due to the lack of appropriate geological archives and commonly faced difficulties in establishing reliable chronologies. Here, the relatively well-dated sediment record from the terminal Lake Ulaan (Ulaan Nuur) is used to reconstruct the lake history and climate in the region. Most abundant calcareous fossils in the lake sediments are ostracod (micro-crustacean) valves. The ostracod assemblage is dominated byLimnocythere inopinata, and generally very shallow conditions and sodium-dominated waters are inferred for Lake Ulaan. A single period of significantly increased silt accumulation in the late glacial was recorded at ca. 16 ka, probably as a result of melting glaciers in the uppermost reaches of the lake's main tributary, the Ongin River, and the influx of glacially ground, fine materials. Lake Ulaan had a higher salinity afterward during the Greenland Interstadial 1, and dry climate prevailed in the region. The lake level started to rise and the salinity decreased since ca. 12.3 ka, leading to the establishment of freshwater conditions in the early Holocene. Highest inflows and highest productivity in and around the lake, and wettest climate conditions in the region were recorded in the early Holocene. Lake conditions, most favorable for the aquatic fauna, culminated ca. 10 ka. Afterward, Lake Ulaan experienced a step-wise lake-level decline and salinity increase at ca. 9.4 and 6.8 ka. The further shrinkage of the lake and the approaching Ongin River mouth near the central part of the basin is recorded since ca. 3.2 ka.
英文关键词	Central Asia Gobi Desert late glacial Holocene palaeoenvironment micropalaeontology
类型	Article
语种	英语
国家	Iceland ; South Korea
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000546793200001
WOS关键词	HOLOCENE ENVIRONMENTAL-CHANGES ; CONDUCTIVITY TRANSFER-FUNCTION ; ARID CENTRAL-ASIA ; GOBI DESERT ; PHRAGMITES-AUSTRALIS ; WESTERN CHINA ; QUATERNARY ; MONSOON ; POLLEN ; RECONSTRUCTION
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319534
作者单位	1.Univ Iceland, Inst Earth Sci, Reykjavik, Iceland; 2.Korea Polar Res Inst, Incheon, South Korea; 3.Seoul Natl Univ, Sch Earth & Environm Sci, Seoul, South Korea
推荐引用方式 GB/T 7714	Mischke, Steffen,Lee, Min Kyung,Lee, Yong Il. Climate History of Southern Mongolia Since 17 ka: The Ostracod, Gastropod and Charophyte Record From Lake Ulaan[J],2020,8.
APA	Mischke, Steffen,Lee, Min Kyung,&Lee, Yong Il.(2020).Climate History of Southern Mongolia Since 17 ka: The Ostracod, Gastropod and Charophyte Record From Lake Ulaan.FRONTIERS IN EARTH SCIENCE,8.
MLA	Mischke, Steffen,et al."Climate History of Southern Mongolia Since 17 ka: The Ostracod, Gastropod and Charophyte Record From Lake Ulaan".FRONTIERS IN EARTH SCIENCE 8(2020).