Characteristics of annual laminae gray level variations in a stalagmite from Shihua Cave, Beijing and its climatic significance (II)

	Characteristics of annual laminae gray level variations in a stalagmite from Shihua Cave, Beijing and its climatic significance (II)
	Qin, XG ; Tan, M ; Liu, DS ; Wang, XF ; Li, TY ; Lu, JP
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2000-10-01
卷号	43 期号:5 页码:521-533
关键词	stalagmite lamina annual gray level variations temperature
ISSN号	1006-9313
文献子类	Article
英文摘要	The annual laminae gray level variations in the stalagmite TS9501 of Shihua Cave, Beijing are studied in detail. The environmental factors influencing the laminae gray level are also analyzed. The following conditions may be necessary to the study on the lamina gray level. A) The seasonal differences of climate in the studied area are strong. B) The cave has a rapid and simple hydrological connection with the surface, such that the gray level variation is great; therefore, climatic changes can be more dearly recorded in a stalagmite. C) No water from other sources due to lateral flow adds to the seepage over the cave. D) There are more organic impurities than inorganic ones, whose content changes distinctly with time in the sample. By comparison with the modern instrumental climate records, it was found that the gray level of laminae is mainly related to the air temperature, especially the summer mean temperature. Therefore, the gray level can be used as a proxy of the air temperature. The variation of the lamina gray level also represents the oscillation of Indian summer monsoon as identified in the modern climate records. The variability of the temperature in Belling area over the last 1 ka is reconstructed. The results show that there are several cold periods corresponding to historical records. An important phenomenon is noticed that the climatic pattern before about 1400AD is different from that after about 1400AD. In Beijing area, before about 1400AD, low amplitude and high frequency temperature oscillations dominated the signal. The climate pattern is warm-dry and cold-wet. After about 1400AD, both the temperature and rainfall varied synchronously, temperature oscillated strongly and the Little Ice Age occurred. The climate pattern is cold-dry and warm-wet. This transition of the climate pattern is also observed in other worldwide paleoclimatic records, demonstrating that there was a global climate event at about 1400AD.
WOS关键词	SPELEOTHEMS ; PALEOCLIMATE ; LUMINESCENT ; RECORD
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000165413800009
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/75891]
专题	中国科学院地质与地球物理研究所
通讯作者	Qin, XG
作者单位	1.Chinese Acad Sci, Inst Geol, Lab Speleotherm & Paleoclimatol, Beijing 100029, Peoples R China 2.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Xian 710054, Peoples R China 3.Beijing Geol Survey Inst, Beijing 102206, Peoples R China
推荐引用方式 GB/T 7714	Qin, XG,Tan, M,Liu, DS,et al. Characteristics of annual laminae gray level variations in a stalagmite from Shihua Cave, Beijing and its climatic significance (II)[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2000,43(5):521-533.
APA	Qin, XG,Tan, M,Liu, DS,Wang, XF,Li, TY,&Lu, JP.(2000).Characteristics of annual laminae gray level variations in a stalagmite from Shihua Cave, Beijing and its climatic significance (II).SCIENCE IN CHINA SERIES D-EARTH SCIENCES,43(5),521-533.
MLA	Qin, XG,et al."Characteristics of annual laminae gray level variations in a stalagmite from Shihua Cave, Beijing and its climatic significance (II)".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 43.5(2000):521-533.