| DOI: | 10.1016/j.gloplacha.2014.10.008
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| 论文题名: | Spring temperature variability and eutrophication history inferred from sedimentary pigments in the varved sediments of Lake Z˙abińskie, north-eastern Poland, AD 1907-2008 |
| 作者: | Amann B.; Lobsiger S.; Fischer D.; Tylmann W.; Bonk A.; Filipiak J.; Grosjean M.
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| ISSN: | 0921-8409
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| 出版年: | 2014
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| 卷: | 123, 期:PA | | 起始页码: | 86
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| 结束页码: | 96
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| 语种: | 英语
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| 英文关键词: | Anthropocene
; Climate change
; Europe
; HPLC
; Limnology
; Trophic status
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| Scopus关键词: | Algae
; Aquatic organisms
; Biogeochemistry
; Climate change
; Cluster analysis
; Ecosystems
; Lakes
; Limnology
; Principal component analysis
; Reflection
; Sedimentology
; Sediments
; Spectroscopy
; Anthropocene
; Climate reconstruction
; Environmental pressures
; Europe
; HPLC
; Paleoenvironmental reconstruction
; Trophic status
; Visible reflectance spectroscopies
; Eutrophication
; climate variation
; dating method
; eutrophication
; lake ecosystem
; paleoenvironment
; pigment
; primary production
; proxy climate record
; sediment analysis
; spring (season)
; varve
; Poland
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| 英文摘要: | Varved lake sediments are excellent natural archives providing quantitative insights into climatic and environmental changes at very high resolution and chronological accuracy. However, due to the multitude of responses within lake ecosystems it is often difficult to understand how climate variability interacts with other environmental pressures such as eutrophication, and to attribute observed changes to specific causes. This is particularly challenging during the past 100. years when multiple strong trends are superposed.Here we present a high-resolution multi-proxy record of sedimentary pigments and other biogeochemical data from the varved sediments of Lake Z˙abińskie (Masurian Lake District, north-eastern Poland, 54°N-22°E, 120. m. a.s.l.) spanning AD 1907 to 2008. Lake Z˙abińskie exhibits biogeochemical varves with highly organic late summer and winter layers separated by white layers of endogenous calcite precipitated in early summer.The aim of our study is to investigate whether climate-driven changes and anthropogenic changes can be separated in a multi-proxy sediment data set, and to explore which sediment proxies are potentially suitable for long quantitative climate reconstructions. We also test if convoluted analytical techniques (e.g. HPLC) can be substituted by rapid scanning techniques (visible reflectance spectroscopy VIS-RS; 380-730. nm).We used principal component analysis and cluster analysis to show that the recent eutrophication of Lake Z˙abińskie can be discriminated from climate-driven changes for the period AD 1907-2008. The eutrophication signal (PC1=46.4%; TOC, TN, TS, Phe-b, high TC/CD ratios total carotenoids/chlorophyll-a derivatives) is mainly expressed as increasing aquatic primary production, increasing hypolimnetic anoxia and a change in the algal community from green algae to blue-green algae. The proxies diagnostic for eutrophication show a smooth positive trend between 1907 and ca 1980 followed by a very rapid increase from ca. 1980±2 onwards. We demonstrate that PC2 (24.4%, Chl-a-related pigments) is not affected by the eutrophication signal, but instead is sensitive to spring (MAM) temperature (r=0.63, pcorr<0.05, RMSEP=0.56°C; 5-yr filtered). Limnological monitoring data (2011-2013) support this finding.We also demonstrate that scanning visible reflectance spectroscopy (VIS-RS) data can be calibrated to HPLC-measured chloropigment data and be used to infer concentrations of sedimentary Chl- a derivatives {pheophytin a+. pyropheophytin a}. This offers the possibility for very high-resolution (multi)millennial-long paleoenvironmental reconstructions. © 2014 Elsevier B.V. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84910643889&doi=10.1016%2fj.gloplacha.2014.10.008&partnerID=40&md5=2776c51918418c829b71806094a2fb1d
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/11315
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| Appears in Collections: | 全球变化的国际研究计划
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作者单位: | Oeschger Centre for Climate Change Research, University of Bern, Switzerland
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| Recommended Citation: | |
Amann B.,Lobsiger S.,Fischer D.,et al. Spring temperature variability and eutrophication history inferred from sedimentary pigments in the varved sediments of Lake Z˙abińskie, north-eastern Poland, AD 1907-2008[J],2014-01-01,123(PA).
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