DOI: 10.5194/cp-10-715-2014
Scopus记录号: 2-s2.0-84898046809
论文题名: The response of the Peruvian Upwelling Ecosystem to centennial-scale global change during the last two millennia
作者: Salvatteci R. ; Gutiérrez D. ; Field D. ; Sifeddine A. ; Ortlieb L. ; Bouloubassi I. ; Boussafir M. ; Boucher H. ; Cetin F.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2014
卷: 10, 期: 2 起始页码: 715
结束页码: 731
语种: 英语
Scopus关键词: air-sea interaction
; anticyclone
; biological production
; climate variation
; global change
; global climate
; greenhouse gas
; intertropical convergence zone
; lamination
; Little Ice Age
; Northern Hemisphere
; oxygen minimum layer
; oxygenation
; paleoceanography
; paleoclimate
; reconstruction
; Roman era
; upwelling
; Walker circulation
; Ica
; Pacific Ocean
; Pacific Ocean (Tropical)
; Peru
; Pisco
英文摘要: The tropical Pacific ocean-atmosphere system influences global climate on interannual, decadal, as well as longer timescales. Given the uncertainties in the response of the tropical Pacific to increasing greenhouse gasses, it is important to assess the role of the tropical Pacific climate variability in response to past global changes. The Peruvian Upwelling Ecosystem (PUE) represents an ideal area to reconstruct past changes in the eastern tropical Pacific region because productivity and subsurface oxygenation are strongly linked to changes in the strength of the Walker circulation. Throughout the last 2000 years, warmer (the Roman Warm Period-RWP; the Medieval Climate Anomaly-MCA; and the Current Warm Period-CWP), and colder (the Dark Ages Cold Period-DACP-and Little Ice Age-LIA) intervals were identified in the Northern Hemisphere (NH). We use a multi-proxy approach including organic and inorganic proxies in finely laminated sediments retrieved off Pisco (∼14° S), Peru to reconstruct the PUE response to these climatic periods. Our results indicate that the centennial-scale changes in precipitation are associated with changes in the Intertropical Convergence Zone (ITCZ) meridional displacements and expansion/contraction of the South Pacific Sub-tropical High (SPSH). Additionally, during the NH cold periods, the PUE exhibited an El Niño-like mean state, characterized by a weak oxygen minimum zone (OMZ), and low marine productivity. In contrast, during the RWP, the last stage of the MCA and the CWP, the PUE exhibited a La Niña-like mean state, characterized by an intense OMZ and high marine productivity. Comparing our results with other relevant paleoclimatic reconstructions revealed that changes in the Walker circulation strength and the SPSH expansion/contraction controlled marine productivity and OMZ intensity changes during the past two millennia.©Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49285
Appears in Collections: 气候变化与战略
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Recommended Citation:
Salvatteci R.,Gutiérrez D.,Field D.,et al. The response of the Peruvian Upwelling Ecosystem to centennial-scale global change during the last two millennia[J]. Climate of the Past,2014-01-01,10(2)