气候变化领域集成服务门户(CCPortal): East European chironomid-based calibration model for past summer temperature reconstructions

CCPortal

DOI	10.3354/cr01543
	East European chironomid-based calibration model for past summer temperature reconstructions
	Luoto T.P.; Kotrys B.; Płóciennik M.
发表日期	2019
ISSN	0936-577X
起始页码	63
结束页码	76
卷号	77 期号:1
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.
英文关键词	Chironomidae; Climate reconstruction; Finland; Holocene; Late Glacial; Paleoclimate; Poland; Training set; Transfer function
语种	英语
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
来源期刊	Climate Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146942
作者单位	Faculty of Biological and Environmental Sciences, Ecosystems and Environment Research Programme, University of Helsinki, Lahti, 15140, Finland; Polish Geological Institute, National Research Institute, Pomeranian Branch in Szczecin, Szczecin, 71-130, Poland; Department of Invertebrate Zoology and Hydrobiology, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, 90-237, Poland
推荐引用方式 GB/T 7714	Luoto T.P.,Kotrys B.,Płóciennik M.. East European chironomid-based calibration model for past summer temperature reconstructions[J],2019,77(1).
APA	Luoto T.P.,Kotrys B.,&Płóciennik M..(2019).East European chironomid-based calibration model for past summer temperature reconstructions.Climate Research,77(1).
MLA	Luoto T.P.,et al."East European chironomid-based calibration model for past summer temperature reconstructions".Climate Research 77.1(2019).