DOI: 10.1016/j.quascirev.2015.08.027
Scopus记录号: 2-s2.0-84941073295
论文题名: Vegetation and climate history in arid western China during MIS2: New insights from pollen and grain-size data of the Balikun Lake, eastern Tien Shan
作者: Zhao Y. ; An C.-B. ; Mao L. ; Zhao J. ; Tang L. ; Zhou A. ; Li H. ; Dong W. ; Duan F. ; Chen F.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 126 起始页码: 112
结束页码: 125
语种: 英语
英文关键词: Balikun lake
; Climate
; Grain size
; Last glacial maximum
; Pollen analysis
; Vegetation
; Western China
Scopus关键词: Arid regions
; Glacial geology
; Grain size and shape
; Isotopes
; Landforms
; Runoff
; Vegetation
; Climate
; Grain size
; Last Glacial Maximum
; Pollen analysis
; Western China
; Lakes
; abundance
; grain size
; Heinrich event
; Last Glacial Maximum
; marine isotope stage
; meltwater
; paleoclimate
; palynology
; shrub
; vegetation cover
; vegetation history
; Balikun Basin
; China
; Tien Shan
; Xinjiang Uygur
; Artemisia
; Cyperaceae
; Elaeagnaceae
; Hippophae
; Poaceae
; Rhamnaceae
; Typha
英文摘要: Marine Isotope Stage (MIS) 2 is mostly a cold period encompassing the Last Glacial Maximum (LGM), but the regional expression of MIS2 in arid areas of China is not well known. In this paper, we use high-resolution lacustrine pollen and grain-size records from Balikun Lake to infer vegetation, lake evolution, and climate in arid western China during MIS2. Our results suggest that: 1) the regional vegetation around Balikun was mainly dominated by desert and/or desert-steppe, and Balikun Lake was relatively shallow and experienced high aeolian input during MIS2; 2) distinctive runoff from mountain glacial meltwater in the eastern parts of the Balikun basin caused a high relative abundance of Artemisia pollen during the LGM (26.5-19.2 cal kyr BP), while simultaneously the desert areas expanded as indicated by the high abundance of desert shrubs (e.g., Elaeagnaceae, Rhamnaceae, Hippophae). This cold and dry LGM climate triggered a substantial lowering of lake level; 3) an extremely cold and dry climate prevailing from 17.0 to 15.2 cal kyr BP, correlated with Heinrich event 1 (H1), would explain the low vegetation cover found then; and 4) the warm and humid Bølling/Allerød interstadial (BA: ca. 15- ca. 13 cal kyr BP) is clearly recorded in the Balikun region by the development of wetland herb communities (e.g., Poaceae, Cyperaceae, Typha), and the lake level rose due to increased runoff. Our results challenge the traditional view of cold and wet climatic conditions and high lake levels in arid western China during the LGM, and we propose that changes in local temperature modulated by July insolation was an indispensable factor in triggering vegetation evolution in the Balikun region during MIS2. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59821
Appears in Collections: 过去全球变化的重建
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作者单位: Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, China; Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China
Recommended Citation:
Zhao Y.,An C.-B.,Mao L.,et al. Vegetation and climate history in arid western China during MIS2: New insights from pollen and grain-size data of the Balikun Lake, eastern Tien Shan[J]. Quaternary Science Reviews,2015-01-01,126