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Paleoecological evi...
Paleoecological evidence of major declines in total organic carbon concentrations since the nineteenth century in four nemoboreal lakes
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- Cunningham, Laura (author)
- School of Geography & Geosciences, University of St Andrews
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- Bishop, Kevin (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment,Department of Environmental Assessment, Swedish University of Agricultural Sciences, Uppsala
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- Mettävainio, Ewa, 1968- (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- Rosén, Peter (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Climate Impacts Research Centre, Umeå University
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(creator_code:org_t)
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- 2010-04-24
- 2011
- English.
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In: Journal of Paleolimnology. - : Springer. - 0921-2728 .- 1573-0417. ; 45:4, s. 507-518
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Abstract
Subject headings
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- A decade of widespread increases in surface water concentrations of total organic carbon (TOC) in some regions has raised questions about longer term patterns in this important constituent of water chemistry. This study uses near-infrared spectroscopy (NIRS) to infer lake water TOC far beyond the decade or two of observational data generally available. An expanded calibration dataset of 140 lakes across Sweden covering a TOC gradient from 0.7 to 24.7 mg L-1 was used to establish a relationship between the NIRS signal from surface sediments (0-0.5 cm) and the TOC concentration of the water mass. Internal cross-validation of the model resulted in an R (2) of 0.72 with a root mean squared error of calibration (RMSECV) of 2.6 mg L-1. The TOC concentrations reconstructed from surface sediments in four Swedish lakes were typically within the range of concentrations observed in the monitoring data during the period represented by each sediment layer. TOC reconstructions from the full sediment cores of four lakes indicated that TOC concentrations were approximately twice as high a century ago.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Fisk- och akvakulturforskning (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Fish and Aquacultural Science (hsv//eng)
- LANTBRUKSVETENSKAPER -- Annan lantbruksvetenskap -- Miljö- och naturvårdsvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Other Agricultural Sciences -- Environmental Sciences related to Agriculture and Land-use (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
Keyword
- carbon cycling
- dissolved organic carbon
- near infrared spectroscopy (NIRS)
- paleolimnology
- sediment
- Sweden
- Earth Science with specialization in Environmental Analysis
Publication and Content Type
- ref (subject category)
- art (subject category)
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