Diatom response to climatic and tectonic forcing of a palaeolake at the southeastern margin of the Tibetan Plateau during the late Pleistocene, between 140 and 35 ka BP

doi:10.1016/j.palaeo.2015.06.039

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院新生代地质与环境重点实验室

	Diatom response to climatic and tectonic forcing of a palaeolake at the southeastern margin of the Tibetan Plateau during the late Pleistocene, between 140 and 35 ka BP
	Li, Yanling 1; Rioual, Patrick 2; Shen, Ji 1; Xiao, Xiayun 1
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	2015-10-15
卷号	436 页码:123-134
关键词	Diatoms Tibetan Plateau Last glacial Last interglacial Climate change Southwest Asian monsoon Palaeoclimate
DOI	10.1016/j.palaeo.2015.06.039
文献子类	Article
英文摘要	The Heqing Basin is located in Yunnan Province, south-western China, near the southeastern edge of the Tibetan Plateau, a region that is strongly influenced by the Asian monsoon. Its long sedimentary record represents an archive of global importance for palaeoclimate research. This study presents the results of diatom analysis of the last 140-35 ka of the record, dated using AMS C-14 and magnetostratigraphy. Diatoms are generally well preserved apart at the top of the sequence (after 35 ka BP) in which diatoms were too few to be counted. The diatom data provide a detailed history of palaeoenvironmental changes during the late Pleistocene and demonstrate the sensitivity of diatoms to changes in climate and hydrology. In particular, they provide proxy evidence for water depth and indirect evidence for temperature changes that are characterized by glacial-interglacial shifts between planktonic and benthic diatoms and variations in the percentage of the warm-water and eutrophic species Aulacoseira granulata, respectively. In the Heqing sequence, remarkably, high proportions of benthic diatoms coincide with warm and wet conditions suggesting that at this site the diatom signal is mediated by climate-catchment-vegetation processes, such as the concentration of nutrient and runoff from the catchment. From similar to 132 ka BP however, the tectonic uplift of the basin caused a change in the hydrological setting of the lake. Pollen and geochemical data are then used to help interpreting the diatom sequence and disentangle the direct effects of climate from those mediated by the conditions on the catchment such as the influence of glacier melt-water. (C) 2015 Elsevier B.V. All rights reserved.
WOS关键词	HEQING BASIN YUNNAN ; LAKE SEDIMENT CORE ; ENVIRONMENTAL-FACTORS ; LACUSTRINE SEDIMENTS ; SOUTHWESTERN CHINA ; TERMINATION-II ; ASIAN MONSOON ; FRESH-WATER ; POLLEN ; RECORD
WOS研究方向	Physical Geography ; Geology ; Paleontology
语种	英语
WOS记录号	WOS:000359874900011
资助机构	Natural National Science Foundation of China(41172152 ; Natural National Science Foundation of China(41172152 ; CAS(KZCX2-EW-QN312) ; CAS(KZCX2-EW-QN312) ; NIGLAS(NIGLAS2012135004) ; NIGLAS(NIGLAS2012135004) ; 40972114) ; 40972114) ; Natural National Science Foundation of China(41172152 ; Natural National Science Foundation of China(41172152 ; CAS(KZCX2-EW-QN312) ; CAS(KZCX2-EW-QN312) ; NIGLAS(NIGLAS2012135004) ; NIGLAS(NIGLAS2012135004) ; 40972114) ; 40972114)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62277]
专题	地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
作者单位	1.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Li, Yanling,Rioual, Patrick,Shen, Ji,et al. Diatom response to climatic and tectonic forcing of a palaeolake at the southeastern margin of the Tibetan Plateau during the late Pleistocene, between 140 and 35 ka BP[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2015,436:123-134.
APA	Li, Yanling,Rioual, Patrick,Shen, Ji,&Xiao, Xiayun.(2015).Diatom response to climatic and tectonic forcing of a palaeolake at the southeastern margin of the Tibetan Plateau during the late Pleistocene, between 140 and 35 ka BP.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,436,123-134.
MLA	Li, Yanling,et al."Diatom response to climatic and tectonic forcing of a palaeolake at the southeastern margin of the Tibetan Plateau during the late Pleistocene, between 140 and 35 ka BP".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 436(2015):123-134.