DOI: 10.1016/j.quascirev.2015.03.011
Scopus记录号: 2-s2.0-84926063878
论文题名: Climate variability on the south-eastern Tibetan Plateau since the Lateglacial based on a multiproxy approach from Lake Naleng - comparing pollen and non-pollen signals
作者: Opitz S. ; Zhang C. ; Herzschuh U. ; Mischke S.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 115 起始页码: 112
结束页码: 122
语种: 英语
英文关键词: Asian monsoon
; Element concentrations
; Grain-size
; Principal component analysis
; Temperature and precipitation reconstructions
; Tibetan Plateau
; Weathering
Scopus关键词: Biogeochemistry
; Biological materials
; Climate change
; Ecology
; Glacial geology
; Indicators (chemical)
; Lakes
; Moisture
; Organic carbon
; Principal component analysis
; Productivity
; Repair
; Sea level
; Weathering
; Asian monsoon
; Element concentrations
; Grain size
; Precipitation reconstruction
; Tibetan Plateau
; Climatology
; biological production
; climate conditions
; climate oscillation
; climate variation
; Holocene
; late glacial
; palynology
; precipitation (climatology)
; provenance
; proxy climate record
; remediation
; sedimentology
; weathering profile
; China
; Qinghai-Xizang Plateau
英文摘要: A multi-proxy Lateglacial environmental record is described from Lake Naleng (31.10°N; 99.75°E, 4200m above sea level), situated on south-eastern Tibetan Plateau to gain deeper insights into the hydrological and palaeoclimate development since 17.7calka BP. Palynological reconstructions of variations in mean annual precipitation (MAP) and temperature (MAT), sedimentological data and sediment chemistry including weathering indicators provide a multi-faceted picture of local and regional environmental changes since the Lateglacial. Principal component analyses of all parameters provide information on interrelationships between each parameters, which help to evaluate their traceability to temperature and precipitation and to estimate their usability as proxy indicators for local and or regional variations. During the Lateglacial from 17.7 to 14.0calka BP Lake Naleng experienced cold and dry climate conditions with low biological productivity and supply of unaltered fine-grained material due to the high supply of glacier milk. During the second half of the Lateglacial, climate conditions changed abruptly: increases in MAT (from-4 to-2.2°C) and MAP (from 500mm to 820mm) between 14.0 and 13.0calka BP indicate a climate amelioration. This time interval can be correlated to the Bølling/Allerød (B/A) warming period in the North Atlantic region and is followed by the Younger Dryas cold reversal indicated by abrupt decreases of MAT (from-2.2 to-5°C) and MAP (from 820 to 650mm). The onset of the Holocene at about 11.5calka BP is indicated by rises in reconstructed MAT (from-5 to about-0.3°C) and MAP (from 600mm to 950mm), which led to an increased supply of weathered material and higher biological productivity. Between 5.0 and 3.0calka BP, MAT increases to about 0.2°C and MAP rises to maximum values of about 1000mm, followed by slightly decreasing MAT and MAP between 3.0 and 0calka BP.The biogeochemical parameters (total organic carbon (TOC), C/N, δ13Corg ) and weathering indicators (e.g. the chemical index of alteration (CIA) and Sr/Ba) are directly (erosion of soils) or indirectly (changing provenance) related to moisture availability on the south-eastern TP and shows matching regional climate oscillations since the Lateglacial. In comparison to other Lateglacial records from the TP, MAP reconstructions from Lake Naleng indicate wetter climate conditions in the south-eastern part of the TP and dryer conditions farther away from moisture sources. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59958
Appears in Collections: 过去全球变化的重建
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作者单位: Institute for Geography, University of Cologne, Albertus-Magnus-Platz, Köln, Germany; School of Earth Sciences and Key Laboratory of Mineral Resources in Western China (Gansu Province), Lanzhou University, Lanzhou, China; Alfred Wegener Institute for Polar and Marine Research, Telegrafenberg A43, Potsdam, Germany; Faculty of Earth Sciences, University of Iceland, 101 Reykjavík, Iceland
Recommended Citation:
Opitz S.,Zhang C.,Herzschuh U.,et al. Climate variability on the south-eastern Tibetan Plateau since the Lateglacial based on a multiproxy approach from Lake Naleng - comparing pollen and non-pollen signals[J]. Quaternary Science Reviews,2015-01-01,115