DOI: 10.5194/cp-11-1635-2015
Scopus记录号: 2-s2.0-84949544427
论文题名: Development of coccolithophore-based transfer functions in the western Mediterranean sea: A sea surface salinity reconstruction for the last 15.5 kyr
作者: Ausín B. ; Hernández-Almeida I. ; Flores J.-A. ; Sierro F.-J. ; Grosjean M. ; Francés G. ; Alonso B.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2015
卷: 11, 期: 12 起始页码: 1635
结束页码: 1651
语种: 英语
Scopus关键词: coccolith
; fossil assemblage
; Heinrich event
; Last Glacial Maximum
; marine sediment
; paleoceanography
; paleoenvironment
; reconstruction
; sea surface salinity
; transfer function
; Atlantic Ocean
; Mediterranean Sea
; Strait of Gibraltar
英文摘要: A new data set of 88 marine surface sediment samples and related oceanic environmental variables (temperature, salinity, chlorophyll a , oxygen, etc.) was studied to quantify the relationship between assemblages of coccolithophore species and modern environmental conditions in the western Mediterranean Sea and the Atlantic Ocean, west of the Strait of Gibraltar. Multivariate statistical analyses revealed that coccolithophore species were primarily related to sea surface salinity (SSS), explaining an independent and significant proportion of variance in the coccolithophore data. A quantitative coccolithophore-based transfer function to estimate SSS was developed using the modern analog technique (MAT) and weighted-averaging partial least square regression (WA-PLS). The bootstrapped regression coefficient (R 2boot) was 0.85MAT and 0.80WA-PLS, with a root-mean-square error of prediction (RMSEP) of 0.29MAT and 0.30WA-PLS (psu). The resulting transfer function was applied to fossil coccolithophore assemblages in the highly resolved (∼ 65 years) sediment core CEUTA10PC08 from the Alboran Sea (western Mediterranean) in order to reconstruct SSS for the last 25 kyr. The reliability of the reconstruction was evaluated by assessing the degree of similarity between fossil and modern coccolithophore assemblages and by a comparison of reconstructions with fossil ordination scores. Analogs were poor for the stadials associated with Heinrich events 2 and 1 and part of the Last Glacial Maximum. Good analogs indicate a more reliable reconstruction of the SSS for the last 15.5 kyr. During this period, several millennial and centennial SSS changes were observed and associated with sea-level oscillations and variations in the Atlantic Water entering the Alboran. © Author(s) 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49090
Appears in Collections: 气候变化与战略
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Recommended Citation:
Ausín B.,Hernández-Almeida I.,Flores J.-A.,et al. Development of coccolithophore-based transfer functions in the western Mediterranean sea: A sea surface salinity reconstruction for the last 15.5 kyr[J]. Climate of the Past,2015-01-01,11(12)