DOI: 10.1016/j.quascirev.2015.01.002
Scopus记录号: 2-s2.0-84921453577
论文题名: Biogeochemical evidence of holocene east asian summer and winter monsoon variability from a tropical maar lake in southern China
作者: Jia G. ; Bai Y. ; Yang X. ; Xie L. ; Wei G. ; Ouyang T. ; Chu G. ; Liu Z. ; Peng P.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 111 起始页码: 51
结束页码: 61
语种: 英语
英文关键词: East Asian monsoon
; ENSO
; Holocene
; Isotope proxy
; Tropical lake record
Scopus关键词: Atmospheric thermodynamics
; Isotopes
; Paraffins
; Sedimentology
; Tropics
; East Asian monsoon
; East Asian summer monsoon
; East Asian winter monsoon
; ENSO
; Holocenes
; Hydrological variability
; Terrestrial ecosystems
; Tropical lakes
; Lakes
; biogeochemistry
; concentration (composition)
; Holocene
; hydrological change
; isotopic analysis
; lacustrine deposit
; maar
; nutrient dynamics
; paleoclimate
; proxy climate record
; seasonal variation
; sediment analysis
; terrestrial ecosystem
; total organic carbon
; tropical environment
; Andes
; Australia
; China
; Dongge Cave
; Guangdong
; Guizhou
; Huguangyan Lake
; Pacific Ocean
; South China Sea
英文摘要: Lake Huguangyan (21°9' N, 110°17' E), a maar lake located near the South China Sea, can provide valuable sedimentary data regarding past changes of the East Asian monsoonal system. Here, we used the proxies of TOC, δ13Corg, δ15N, and leaf wax n-alkane δ13C values (δ13Cwax) to reconstruct the lake conditions, which, in turn, revealed patterns in monsoonal changes during the Holocene. Two distinct patterns of proxy changes were identified in the sedimentary profile. A marked shift in the δ13Cwax value at ~9.2ka (thousand years ago) suggests the abrupt disappearance of C4 plants, signaling the enhancement of East Asian summer monsoon (EASM). Between 9.2 and 1.8ka, a nearly pure C3 terrestrial ecosystem was present, with the climax at ca7-6ka. After ca3ka, fewer tropical species and a reappearance of C4 plants at 1.8ka indicate a weakened EASM in the late Holocene. The TOC concentration and δ15N value proxies appear to be associated with lake aquatic production and upwelled nutrient supply and utilization, which are modulated by, and thus indicative of, the strength of the East Asian winter monsoon (EAWM). The two EAWM records suggest a weakening trend from the early to late Holocene, with the most significant transition at ~6ka; thus, the EAWM trend was broadly in-phase with that of the EASM. However, the marked EASM intensification at 9.2ka occurred within the period of a strong EAWM between 10.5 and 6ka and lagged the monsoonal enhancement as inferred from the Dongge Cave δ18O values. Our EASM records displays an overall arid-wet-arid pattern, which is in-phase with the hydrological variability in tropical Australia and anti-phase with that in the outer-tropical Andes. These phase relationships might be linked to changes in the thermal state of the tropical Pacific during the Holocene. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60011
Appears in Collections: 过去全球变化的重建
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作者单位: Key Laboratory of Marginal Sea Geology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; Department of Earth Sciences, Sun Yat-Sen University, Guangzhou, China; Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; Department of Earth Sciences, The University of Hong Kong, China; University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Jia G.,Bai Y.,Yang X.,et al. Biogeochemical evidence of holocene east asian summer and winter monsoon variability from a tropical maar lake in southern China[J]. Quaternary Science Reviews,2015-01-01,111