DOI: 10.5194/cp-12-981-2016
Scopus记录号: 2-s2.0-84969262482
论文题名: Major perturbations in the global carbon cycle and photosymbiont-bearing planktic foraminifera during the early Eocene
作者: Luciani V. ; Dickens R.G. ; Backman J. ; Fornaciari E. ; Giusberti L. ; Agnini C. ; D'Onofrio R.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2016
卷: 12, 期: 4 起始页码: 981
结束页码: 1007
语种: 英语
Scopus关键词: biomarker
; biostratigraphy
; carbon cycle
; carbon isotope
; Deep Sea Drilling Project
; Eocene
; isotopic analysis
; Ocean Drilling Program
; oxygen isotope
; paleoclimate
; perturbation
; planktonic foraminifera
; relative abundance
; symbiont
; Atlantic Ocean
; Atlantic Ocean (Northwest)
; Italy
; Pacific Ocean
; Pacific Ocean (Northwest)
; Acarinina
; Discoaster
; Foraminifera
; Morozovella
英文摘要: A marked switch in the abundance of the planktic foraminiferal genera Morozovella and Acarinina occurred at low-latitude sites near the start of the Early Eocene Climatic Optimum (EECO), a multi-million-year interval when Earth surface temperatures reached their Cenozoic maximum. Stable carbon and oxygen isotope data of bulk sediment are presented from across the EECO at two locations: Possagno in northeast Italy and Deep Sea Drilling Project (DSDP) Site 577 in the northwest Pacific. Relative abundances of planktic foraminifera are presented from these two locations, as well as from Ocean Drilling Program (ODP) Site 1051 in the northwest Atlantic. All three sections have good stratigraphic markers, and the λ13C records at each section can be correlated amongst each other and to λ13C records at other locations across the globe. These records show that a series of negative carbon isotope excursions (CIEs) occurred before, during and across the EECO, which is defined here as the interval between the J event and the base of Discoaster sublodoensis . Significant though ephemeral modifications in planktic foraminiferal assemblages coincide with some of the short-term CIEs, which were marked by increases in the relative abundance of Acarinina , similar to what happened across established hyperthermal events in Tethyan settings prior to the EECO. Most crucially, a temporal link exists between the onset of the EECO, carbon cycle changes during this time and the decline in Morozovella . Possible causes are manifold and may include temperature effects on photosymbiont-bearing planktic foraminifera and changes in ocean chemistry. © Author(s) 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49027
Appears in Collections: 气候变化与战略
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Recommended Citation:
Luciani V.,Dickens R.G.,Backman J.,et al. Major perturbations in the global carbon cycle and photosymbiont-bearing planktic foraminifera during the early Eocene[J]. Climate of the Past,2016-01-01,12(4)