ENSO related decadal scale climate variability from the Indo-Pacific Warm Pool
Brijker, JM; Jung, SJA; Ganssen, GM; Bickert, T; Kroon, D; brij@geo.vu.nl
2007
发表期刊EARTH AND PLANETARY SCIENCE LETTERS
ISSN0012-821X
卷号253期号:40545页码:67-82
摘要The El Nino-Southern Oscillation (ENSO) is a climatic phenomenon that affects socio-economical welfare in vast areas in the world. A continuous record of Holocene ENSO related climate variability of the Indo-Pacific Warm pool (IPWP) is constructed on the basis of stable oxygen isotopes in shells of planktic foraminifera from a sediment core in the western Pacific Ocean. At the centennial scale, variations in the stable oxygen isotope signal (delta O-18) are thought be a representation of ENSO variability, although an imprint of local conditions cannot be entirely excluded. The record for the early Holocene (10.3-6 ka BP) shows, in comparison with the mid- to late Holocene, small amplitude variations in the delta O-18 record of up to 0.3 parts per thousand indicating relatively stable and warm sea surface conditions. The mid- to late Holocene (6-2 ka BP) exemplified higher variability in delta O-18 and thus in oceanic IPWP conditions. Climatically, we interpret this change (5.5-4.2 ka BP) as a phenomenon induced by variability in frequency and/or intensity changes of El Nino. In the period 4.2-2 ka BP we identified several periods, centred on 1.9, 2.1, 2.7, 3.3, 3.7 and 4.2 ka BP, with in general heavy 6180 values. During these periods, the IPWP was relocated to a more eastward position, enhancing the susceptibility for El Nino-like conditions at the core site. Over the last 2000 yr precipitation increased in the area as a response to an increase in Asian monsoon strength, resulting in a freshening of the surface waters. This study corroborates previous findings that the present-day ENSO activity started around 5.5 ka BP. (c) 2006 Elsevier B.V. All rights reserved.
部门归属Vrije Univ Amsterdam, Fac Earth & Life Sci, Dept Paleoecol & Geomorphol, NL-1081 HV Amsterdam, Netherlands; Univ Bremen, Fachbereich Geowissensch 5, D-28334 Bremen, Germany
关键词Enso Holocene Indo-pacific Warm Pool Oxygen Isotopes
学科领域Geochemistry & Geophysics
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收录类别sci
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/8455
专题海洋科技动态信息-印太暖池系统研究
通讯作者brij@geo.vu.nl
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Brijker, JM,Jung, SJA,Ganssen, GM,et al. ENSO related decadal scale climate variability from the Indo-Pacific Warm Pool[J]. EARTH AND PLANETARY SCIENCE LETTERS,2007,253(40545):67-82.
APA Brijker, JM,Jung, SJA,Ganssen, GM,Bickert, T,Kroon, D,&brij@geo.vu.nl.(2007).ENSO related decadal scale climate variability from the Indo-Pacific Warm Pool.EARTH AND PLANETARY SCIENCE LETTERS,253(40545),67-82.
MLA Brijker, JM,et al."ENSO related decadal scale climate variability from the Indo-Pacific Warm Pool".EARTH AND PLANETARY SCIENCE LETTERS 253.40545(2007):67-82.
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