DOI: 10.3354/cr01543
Scopus记录号: 2-s2.0-85060858133
论文题名: East European chironomid-based calibration model for past summer temperature reconstructions
作者: Luoto T.P. ; Kotrys B. ; Płóciennik M.
刊名: Climate Research
ISSN: 0936577X
出版年: 2019
卷: 77, 期: 1 起始页码: 63
结束页码: 76
语种: 英语
英文关键词: Chironomidae
; Climate reconstruction
; Finland
; Holocene
; Late Glacial
; Paleoclimate
; Poland
; Training set
; Transfer function
Scopus关键词: biostratigraphy
; calibration
; climate variation
; fly
; fossil record
; late glacial
; paleoclimate
; reconstruction
; regional climate
; sediment core
; summer
; transfer function
; Eastern Europe
; Finland
; Poland [Central Europe]
; Chironomidae
; Diptera
英文摘要: Understanding local patterns and large-scale processes in past climate necessitates a detailed network of temperature reconstructions. In this study, a merged temperature inference model using fossil chironomid (Diptera: Chironomidae) datasets from Finland and Poland was constructed to fill the lack of an applicable training set for East European sites. The developed weighted averaging partial least squares (WA-PLS) inference model showed favorable performance statistics, suggesting that the model can be useful for downcore reconstructions. The combined calibration model includes 212 sites, 142 taxa, and a temperature gradient of 11.3-20.1°C. The 2-component WA-PLS model has a cross-validated coefficient of determination of 0.88 and a root mean squared prediction error of 0.88°C. We tested the new East European temperature transfer function in chironomid stratigraphies from a Finnish high-resolution short-core sediment record and a Polish paleolake (Żabieniec) covering the past ∼20 000 yr. In the Finnish site, the chironomid-inferred temperatures correlated closely with the observed instrumental temperatures, showing improved accuracy compared to estimates by the original Finnish calibration model. In addition, the long-core reconstruction from the Polish site showed logical results in its general trends compared to existing knowledge on the past regional climate trends; however, it had distinct differences when compared with hemispheric climate oscillations. Hence, based on these findings, the new temperature model will enable more detailed examination of long-term temperature variability in Eastern Europe, and consequently, reliable identification of local and regional climate variability of the past. © 2019 Inter-Research. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116242
Appears in Collections: 气候减缓与适应
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Recommended Citation:
Luoto T.P.,Kotrys B.,Płóciennik M.. East European chironomid-based calibration model for past summer temperature reconstructions[J]. Climate Research,2019-01-01,77(1)