DOI: 10.1016/j.quascirev.2015.05.029
Scopus记录号: 2-s2.0-84930618769
论文题名: A chrysophyte-based quantitative reconstruction of winter severity from varved lake sediments in NE Poland during the past millennium and its relationship to natural climate variability
作者: Hernández-Almeida I. ; Grosjean M. ; Przybylak R. ; Tylmann W.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 122 起始页码: 74
结束页码: 88
语种: 英语
英文关键词: Chrysophytes
; Cold-season
; External forcings
; Lake sediments
; Last millennium
; Poland
Scopus关键词: Algae
; Atmospheric movements
; Atmospheric pressure
; Chemical analysis
; Chlorine compounds
; Climate change
; Lakes
; Mean square error
; Oscillating flow
; Plants (botany)
; Sediments
; Volcanoes
; Chrysophytes
; Cold season
; Forcings
; Lake sediments
; Last millenniums
; Poland
; Transfer functions
; alga
; climate variation
; cyst
; lacustrine deposit
; Medieval
; proxy climate record
; quantitative analysis
; reconstruction
; sediment trap
; winter
; Poland
; Western Europe
; Chrysophyceae
英文摘要: Chrysophyte cysts are recognized as powerful proxies of cold-season temperatures. In this paper we use the relationship between chrysophyte assemblages and the number of days below 4°C (DB4°C) in the epilimnion of a lake in northern Poland to develop a transfer function and to reconstruct winter severity in Poland for the last millennium. DB4°C is a climate variable related to the length of the winter. Multivariate ordination techniques were used to study the distribution of chrysophytes from sediment traps of 37 low-land lakes distributed along a variety of environmental and climatic gradients in northern Poland. Of all the environmental variables measured, stepwise variable selection and individual Redundancy analyses (RDA) identified DB4°C as the most important variable for chrysophytes, explaining a portion of variance independent of variables related to water chemistry (conductivity, chlorides, K, sulfates), which were also important. A quantitative transfer function was created to estimate DB4°C from sedimentary assemblages using partial least square regression (PLS). The two-component model (PLS-2) had a coefficient of determination of Rcross2=0.58, with root mean squared error of prediction (RMSEP, based on leave-one-out) of 3.41 days. The resulting transfer function was applied to an annually-varved sediment core from Lake Zabińskie, providing a new sub-decadal quantitative reconstruction of DB4°C with high chronological accuracy for the period AD 1000-2010. During Medieval Times (AD 1180-1440) winters were generally shorter (warmer) except for a decade with very long and severe winters around AD 1260-1270 (following the AD 1258 volcanic eruption). The 16th and 17th centuries and the beginning of the 19th century experienced very long severe winters. Comparison with other European cold-season reconstructions and atmospheric indices for this region indicates that large parts of the winter variability (reconstructed DB4°C) is due to the interplay between the oscillations of the zonal flow controlled by the North Atlantic Oscillation (NAO) and the influence of continental anticyclonic systems (Siberian High, East Atlantic/Western Russia pattern). Differences with other European records are attributed to geographic climatological differences between Poland and Western Europe (Low Countries, Alps). Striking correspondence between the combined volcanic and solar forcing and the DB4°C reconstruction prior to the 20th century suggests that winter climate in Poland responds mostly to natural forced variability (volcanic and solar) and the influence of unforced variability is low. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59885
Appears in Collections: 过去全球变化的重建
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作者单位: Institute of Geography, University of Bern, Erlachstrasse 9a, Bern, Switzerland; Oeschger Centre for Climate Change Research, University of Bern, Falkenplatz 16, Bern, Switzerland; Department of Meteorology and Climatology, Faculty of Earth Sciences, Nicolaus Copernicus University, Lwowska 1, Toruń, Poland; Faculty of Oceanography and Geography, University of Gdańsk, Bazynskiego 4, Gdańsk, Poland
Recommended Citation:
Hernández-Almeida I.,Grosjean M.,Przybylak R.,et al. A chrysophyte-based quantitative reconstruction of winter severity from varved lake sediments in NE Poland during the past millennium and its relationship to natural climate variability[J]. Quaternary Science Reviews,2015-01-01,122