DOI: 10.1016/j.epsl.2018.04.019
Scopus记录号: 2-s2.0-85046350939
论文题名: Transition from a warm and dry to a cold and wet climate in NE China across the Holocene
作者: Zheng Y. ; Pancost R.D. ; Naafs B.D.A. ; Li Q. ; Liu Z. ; Yang H.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 493 起始页码: 36
结束页码: 46
语种: 英语
英文关键词: air temperature
; GDGTs
; Holocene hydrological evolution
; NE China
; peatland
Scopus关键词: Atmospheric temperature
; Glycerol
; Peat
; Sea ice
; Soil moisture
; Air temperature
; GDGTs
; Holocenes
; NE China
; Peatland
; Soil surveys
; air temperature
; Holocene
; hydrological change
; monsoon
; paleoclimate
; paleotemperature
; peatland
; precipitation (climatology)
; summer
; China
; Archaea
; Bacteria (microorganisms)
英文摘要: Northeast (NE) China lies in the northernmost part of the East Asian Summer monsoon (EASM) region. Although a series of Holocene climatic records have been obtained from lakes and peats in this region, the Holocene hydrological history and its controls remain unclear. More specifically, it is currently debated whether NE China experienced a dry or wet climate during the early Holocene. Here we reconstruct changes in mean annual air temperature and peat soil moisture across the last ∼13,000 year BP using samples from the Gushantun and Hani peat, located in NE China. Our approach is based on the distribution of bacterial branched glycerol dialkyl glycerol tetraethers (brGDGTs) and the abundance of the archaeal isoprenoidal (iso)GDGT crenarchaeol. Using the recently developed peat-specific MAATpeat temperature calibration we find that NE China experienced a relatively warm early Holocene (∼5–7 °C warmer than today), followed by a cooling trend towards modern-day values during the mid- and late Holocene. Moreover, crenarchaeol concentrations, brGDGT-based pH values, and the distribution of 6-methyl brGDGTs, all indicate an increase in soil moisture content from the early to late Holocene in both peats, which is largely consistent with other data from NE China. This trend towards increasing soil moisture/wetter conditions across the Holocene in NE China records contrasts with the trends observed in other parts of the EASM region, which exhibit an early and/or mid-Holocene moisture/precipitation maximum. However, the Holocene soil moisture variations and temperature–moisture relationships (warm–dry and cold–wet) observed in NE China are similar to those observed in the core area of arid central Asia which is dominated by the westerlies. We therefore propose that an increase in the intensity of the westerlies across the Holocene, driven by increasing winter insolation, expanding Arctic sea ice extent and the enhanced Okhotsk High, caused an increase in moisture during the late Holocene in NE China. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109864
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an, 710069, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710075, China; Organic Geochemistry Unit, School of Chemistry, Cabot Institute, University of Bristol, Cantock's Close, Bristol, BS8 1TS, United Kingdom; School of Environmental & Chemical Engineering, Xi'an Polytechnic University, Xi'an, 710048, China; State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China
Recommended Citation:
Zheng Y.,Pancost R.D.,Naafs B.D.A.,et al. Transition from a warm and dry to a cold and wet climate in NE China across the Holocene[J]. Earth and Planetary Science Letters,2018-01-01,493