DOI: 10.1016/j.quascirev.2016.06.002
Scopus记录号: 2-s2.0-84975721696
论文题名: A persistent Holocene wetting trend in arid central Asia, with wettest conditions in the late Holocene, revealed by multi-proxy analyses of loess-paleosol sequences in Xinjiang, China
作者: Chen F. ; Jia J. ; Chen J. ; Li G. ; Zhang X. ; Xie H. ; Xia D. ; Huang W. ; An C.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 146 起始页码: 134
结束页码: 146
语种: 英语
英文关键词: Holocene
; Loess-paleosol sequence
; Moisture trend
; Wettest late Holocene
Scopus关键词: Atmospheric pressure
; Atmospheric thermodynamics
; Climate change
; Moisture
; Sediments
; East Asian summer monsoon
; Holocenes
; Indian summer monsoon
; Insolation gradients
; Late Holocene
; Loess-paleosol sequence
; North Atlantic oscillations
; Oxygen isotope records
; Wind
; Antarctic Oscillation
; arid environment
; climate conditions
; Holocene
; lacustrine deposit
; loess
; moisture
; North Atlantic Oscillation
; oxygen isotope
; paleoclimate
; paleosol
; persistence
; seasonality
; speleothem
; trend analysis
; westerly
; wetting
; Arctic
; Atlantic Ocean
; Atlantic Ocean (North)
; China
; Ili River
英文摘要: There are significant differences in the interpretation of the moisture (precipitation) history of arid central Asia (ACA) during the Holocene, as inferred on one hand from speleothem oxygen isotope records, and on the other from lake sediments. Here we present the results of measurements of climatically-sensitive magnetic properties and soil color from four well-dated loess-paleosol sequences from the northern slopes of the Tienshan Mountains and the Yili River valley, Xinjiang, China, in the core area of ACA. Our results demonstrate that the characteristic Holocene paleosol, indicating relatively moist conditions, generally formed after ~6 ka (1 ka = 1000 cal yr BP) in the study region, and that the accumulation of unweathered loess prevailed during the early Holocene, indicating a dry climate at that time. The magnetic proxies further reveal a trend of generally increasing moisture since the Last Glacial Maximum, with the wettest climate occurring during the late Holocene. This trend of increasing moisture during the Holocene is representative of the Xinjiang region and possibly of the whole of the core area of ACA, and is in marked contrast both to the mid-Holocene moisture maximum observed in the East Asian summer monsoon region and to the general decrease in the strength of the Indian summer monsoon since the early Holocene. Our findings are supported by the results of a climate simulation which indicate a trend of increasing summer and winter precipitation during the Holocene in the core area of ACA, caused mainly by an increase in the strength of the westerlies effected by an increasing latitudinal insolation gradient and by a negative trend of the Arctic Oscillation (AO) or North Atlantic Oscillation (NAO). © 2016 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59525
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: MOE Key Laboratory of Western China's Environmental System, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, China; Chinese Academy of Sciences Center for Excellence, Tibetan Plateau Earth Sciences, Beijing, China
Recommended Citation:
Chen F.,Jia J.,Chen J.,et al. A persistent Holocene wetting trend in arid central Asia, with wettest conditions in the late Holocene, revealed by multi-proxy analyses of loess-paleosol sequences in Xinjiang, China[J]. Quaternary Science Reviews,2016-01-01,146