DOI: 10.1016/j.quascirev.2013.01.016
Scopus记录号: 2-s2.0-84873937106
论文题名: Mid- to late Holocene Indian Ocean Monsoon variability recorded in four speleothems from Socotra Island, Yemen
作者: Van Rampelbergh M. ; Fleitmann D. ; Verheyden S. ; Cheng H. ; Edwards L. ; De Geest P. ; De Vleeschouwer D. ; Burns S.J. ; Matter A. ; Claeys P. ; Keppens E.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 65 起始页码: 129
结束页码: 142
语种: 英语
英文关键词: Indian Ocean Monsoon
; Paleoclimate
; Socotra
; Speleothems
; Stable isotopes
; Trace elements
Scopus关键词: Indian Ocean Monsoon
; Paleoclimates
; Socotra
; Speleothems
; Stable isotopes
; Glacial geology
; Isotopes
; Lasers
; Oceanography
; Rain
; Trace elements
; Wind
; Atmospheric thermodynamics
; calcite
; Holocene
; ice core
; intertropical convergence zone
; monsoon
; paleoclimate
; speleothem
; stable isotope
; stalagmite
; Hadramawt
; Oman
; Socotra
; Yemen
英文摘要: Four stalagmites covering the last 7.0 ka were sampled on Socotra, an island in the northern Indian Ocean to investigate the evolution of the northeast Indian Ocean Monsoon (IOM) since the mid Holocene. On Socotra, rain is delivered at the start of the southwest IOM in May-June and at the start of the northeast IOM from September to December. The Haggeher Mountains act as a barrier forcing precipitation brought by the northeast winds to fall preferentially on the eastern side of the island, where the studied caves are located. δ18O and δ13C and Mg/Ca and Sr/Ca signals in the stalagmites reflect precipitation amounts brought by the northeast winds. For stalagmite STM6, this amount effect is amplified by kinetic effects during calcite deposition. Combined interpretation of the stalagmites' signals suggest a weakening of the northeast precipitation between 6.0 and 3.8 ka. After 3.8 ka precipitation intensities remain constant with two superimposed drier periods, between 0 and 0.6 ka and from 2.2 to 3.8 ka. No link can be established with Greenland ice cores and with the summer IOM variability.In contrast to the stable northeast rainy season suggested by the records in this study, speleothem records from western Socotra indicate a wettening of the southwest rainy season on Socotra after 4.4 ka. The local wettening of western Socotra could relate to a more southerly path (more over the Indian Ocean) taken by the southwest winds. Stalagmite STM5, sampled at the fringe between both rain areas displays intermediate δ18O values. After 6.2 ka, similar precipitation changes are seen between eastern Socotra and northern Oman indicating that both regions are affected similarly by the monsoon. Different palaeoclimatologic records from the Arabian Peninsula currently located outside the ITCZ migration pathway display an abrupt drying around 6 ka due to their disconnection from the southwest rain influence. Records that are nowadays still receiving rain by the southwest winds, suggest a more gradual drying reflecting the weakening of the southwest monsoon. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60680
Appears in Collections: 过去全球变化的重建
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作者单位: Earth System Sciences Department, Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium; Institute of Geosciences, University of Bern, Baltzerstrasse 1-3, CH-3012 Bern, Switzerland; Oeschger Centre for Climate Change Research, University of Bern, Zähringerstrasse 25, CH-3012 Bern, Switzerland; Geological Survey of Belgium, Royal Belgian Institute of Natural Sciences, Jennerstraat 13, B-1000 Brussels, Belgium; Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an 710049, China; Department of Geological Sciences, University of Minnesota, 100 Union Street SE, Minneapolis, MN 55455, United States; Bijlokestraat 57, B-9070 Destelbergen, Belgium; Department of Geosciences, University of Massachusetts, Morrill Science Center 233, Amherst, MA 01003, United States
Recommended Citation:
Van Rampelbergh M.,Fleitmann D.,Verheyden S.,et al. Mid- to late Holocene Indian Ocean Monsoon variability recorded in four speleothems from Socotra Island, Yemen[J]. Quaternary Science Reviews,2013-01-01,65