Arid
DOI10.1016/S0016-7037(02)01031-1
Sea-land oxygen isotopic relationships from planktonic foraminifera and speleothems in the Eastern Mediterranean region and their implication for paleorainfall during interglacial intervals
Bar-Matthews, M; Ayalon, A; Gilmour, M; Matthews, A; Hawkesworth, CJ
通讯作者Bar-Matthews, M
来源期刊GEOCHIMICA ET COSMOCHIMICA ACTA
ISSN0016-7037
EISSN1872-9533
出版年2003
卷号67期号:17页码:3181-3199
英文摘要

The oxygen and carbon stable isotope compositions of cave speleothems provide a powerful method for understanding continental climate change. Here, we examine the question of the regionality of this isotopic record and its linkage with the marine isotopic record in the Eastern Mediterranean (EM) region. The study presents a new, accurately dated 250-kyr delta(18)O and VC record determined from speleothems of the Peqiin Cave, Northern Israel. Its comparison with the continuous 185-kyr isotopic record of the Soreq Cave speleothems from Central Israel reveals striking similarities. Thus, a strong regional climatic signal, brought about by variations in temperature and rainfall amount, is reflected in both cave records. Low delta(18)O minima in the Peqiin profile for the last 250- to 185-kyr period (interglacial marine isotopic stage 7) match the timing of sapropels 9 to 7 and are indicative of high rainfall in the EM region at these times. The combined Soreq and Peqiin 8180 record for the last 250 kyr excellently matches the published Globigerinoides ruber (G. ruber) marine delta(18)O record for the EM Sea, with the isotopic compositional difference Delta(G.ruber-speleothems) remaining relatively constant at -5.6 +/- 0.7%, thus establishing for the first time a robust, exploitable link between the land and the marine isotopic records. The correspondence of low delta(18)O speleothem values and high cave water stands with low G. ruber delta(18)O values during interglacial sapropel events indicates that these periods were characterized by enhanced rainfall in the EM land and sea regions. By use of sea surface temperatures derived from alkenone data as a proxy for land temperatures at the Soreq Cave, we calculate the paleorainfall delta(18)O values and its amounts. Maximum rainfall and lowest temperature conditions occurred at the beginning of the sapropel events and were followed by decrease in rainfall and increase in temperatures, leading to and conditions. The record for the last 7000 yr shows a trend toward increasing aridity and agrees well with climatic and archeological data from North Africa and the Middle East. Copyright (C) 2003 Elsevier Ltd.


类型Article
语种英语
国家Israel ; England
收录类别SCI-E
WOS记录号WOS:000185111200007
WOS关键词HOLOCENE CLIMATE VARIABILITY ; LAKE-LEVEL FLUCTUATIONS ; SOREQ CAVE ; LATE QUATERNARY ; SEASONAL-VARIATIONS ; SAPROPEL FORMATION ; STABLE-ISOTOPE ; SNAIL SHELLS ; NEGEV DESERT ; TIME-SCALE
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
来源机构Hebrew University of Jerusalem
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/144642
作者单位(1)Geol Survey Israel, IL-95501 Jerusalem, Israel;(2)Open Univ, Dept Earth Sci, Milton Keynes MK7 6AA, Bucks, England;(3)Hebrew Univ Jerusalem, Inst Earth Sci, IL-91904 Jerusalem, Israel;(4)Univ Bristol, Dept Earth Sci, Bristol, Avon, England
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GB/T 7714
Bar-Matthews, M,Ayalon, A,Gilmour, M,et al. Sea-land oxygen isotopic relationships from planktonic foraminifera and speleothems in the Eastern Mediterranean region and their implication for paleorainfall during interglacial intervals[J]. Hebrew University of Jerusalem,2003,67(17):3181-3199.
APA Bar-Matthews, M,Ayalon, A,Gilmour, M,Matthews, A,&Hawkesworth, CJ.(2003).Sea-land oxygen isotopic relationships from planktonic foraminifera and speleothems in the Eastern Mediterranean region and their implication for paleorainfall during interglacial intervals.GEOCHIMICA ET COSMOCHIMICA ACTA,67(17),3181-3199.
MLA Bar-Matthews, M,et al."Sea-land oxygen isotopic relationships from planktonic foraminifera and speleothems in the Eastern Mediterranean region and their implication for paleorainfall during interglacial intervals".GEOCHIMICA ET COSMOCHIMICA ACTA 67.17(2003):3181-3199.
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