Holocene chemical weathering and climatic oscillations in north China: evidence from lacustrine sediments

doi:10.1080/03009480410001280

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 黄土与第四纪地质国家重点实验室（1985-2004）

	Holocene chemical weathering and climatic oscillations in north China: evidence from lacustrine sediments
	Jin, ZD; Wu, JL; Cao, JJ; Wang, SM; Shen, J; Gao, NH; Zou, CJ
刊名	BOREAS
	2004-09
卷号	33 期号:3 页码:260-266
DOI	10.1080/03009480410001280
文献子类	Article
英文摘要	Holocene lacustrine sediments from two isolated lakes in north China are investigated. Based on palaeoclimatic significance of independent proxies in lake sediments, Holocene chemical weathering, and hence climate change, has been reconstructed for dated sediment cores from Daihai Lake and Aibi Lake. During early to mid-Holocene, higher weathering intensity occurred in the Daihai catchment under warm and humid climate conditions, and this reached a maximum at similar to5 kyr BP. However, synchronous proxy shifts from the two widely separated, isolated lake sediments indicate that there was a cool climate event during the early to mid-Holocene transition. This is characterized by reduced weathering in each catchment, low delta(13)C and delta(18)O of authigenic carbonate, and by lake level fluctuations. These might correspond to a global cooling signal identified in lakes, oceans, mollusc sequences, and polar ice cores, typically centred between similar to8.0 and 8.5 kyr BP. Dry conditions were experienced in Greenland, the North Atlantic and surrounding regions, and in broad monsoonal regions including Daihai at this time. However, recent extensive evidences as well as our data from the Aibi Lake sediments show that cool but wet conditions occurred in the central Eurasian continent at this time. After similar to2.5 kyr BP, a significant shift of independent sediment proxies indicates the beginning of the Neoglaciation with a higher frequency of fluctuations, including both the Medieval Warm Period (MWP) and the Little Ice Age (LIA). Our continental records provide new evidence of the Holocene climate variability with global significance and highlight the different spatial nature of the response to oscillations associated with different climate patterns.
学科主题	Physical Geography ; Geology
WOS关键词	LAKE-SEDIMENTS ; LAST DEGLACIATION ; WARM PERIOD ; ICE-SHEET ; NEW-YORK ; EUROPE ; AGE ; VARIABILITY ; ISOTOPES ; RATIOS
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary
语种	英语
出版者	WILEY
WOS记录号	WOS:000222997800007
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/11987]
专题	黄土与第四纪地质国家重点实验室（1985-2004）
推荐引用方式 GB/T 7714	Jin, ZD,Wu, JL,Cao, JJ,et al. Holocene chemical weathering and climatic oscillations in north China: evidence from lacustrine sediments[J]. BOREAS,2004,33(3):260-266.
APA	Jin, ZD.,Wu, JL.,Cao, JJ.,Wang, SM.,Shen, J.,...&Zou, CJ.(2004).Holocene chemical weathering and climatic oscillations in north China: evidence from lacustrine sediments.BOREAS,33(3),260-266.
MLA	Jin, ZD,et al."Holocene chemical weathering and climatic oscillations in north China: evidence from lacustrine sediments".BOREAS 33.3(2004):260-266.