2019
DOI: 10.1016/j.scitotenv.2019.01.320 View full text |Buy / Rent full text
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Abstract: In the case of environmental samples, the use of a chemometrics-based prediction model is highly challenging because of the difficulty in experimentally creating a well-ranged reference sample set. In this study, we present a methodology using short wave infrared hyperspectral imaging to create a partial least squares regression model on a cored sediment sample. It was applied to a sediment core of the well-known Lake Bourget (Western Alps, France) to develop and validate a model for downcore high resolution L… Show more

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“…The combination of the two HSI into a unique one (i.e., VNIR-SWIR) was made with image registration (Liu et al, 2011) adapted to HSI with a registration on a wavelength plane characteristic of a similar chemical compound. In previous work, we find that the 970 nm (VNIR) and 1200 nm (SWIR) wavelengths were optimal to combine them (Jacq et al, 2019c). They are related to hydroxyl chemical bonds mostly associated with moisture for sediment cores (Bull, 1991;Viscarra Rossel and Behrens, 2010).…”
Section: Sample Sites Descriptionmentioning
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“…The combination of the two HSI into a unique one (i.e., VNIR-SWIR) was made with image registration (Liu et al, 2011) adapted to HSI with a registration on a wavelength plane characteristic of a similar chemical compound. In previous work, we find that the 970 nm (VNIR) and 1200 nm (SWIR) wavelengths were optimal to combine them (Jacq et al, 2019c). They are related to hydroxyl chemical bonds mostly associated with moisture for sediment cores (Bull, 1991;Viscarra Rossel and Behrens, 2010).…”
Section: Sample Sites Descriptionmentioning
“…Here, the work proposed the use of Rb measurements to correct the metal concentrations estimated in the field on fresh sediment in which the presence of interstitial water diluted the sediment mass and attenuated the incident X-rays. The full potential of other low-cost and high-resolution techniques including hyperspectral spectroscopy imaging remains to be explored (Butz et al 2015 ; Aymerich et al 2016 ; Jacq et al 2019 ).…”
Section: Emerging Themes In Sediment Fingerprinting Research and Applmentioning
“…Recently, the use of hyperspectral sensors provided a way to analyse chlorophyll a to quantify changes in burnt organic matter levels in a lake draining a catchment exposed to forest fires (Van Exem et al 2018 ). Collaborations between palaeoclimatologists, geomorphologists and hydrologists will stimulate novel methods and corresponding findings (Jacq et al 2019 ).…”
Section: Emerging Themes In Sediment Fingerprinting Research and Applmentioning
“…• C represents the percentage of total inorganic carbon (TIC). The sum of TOC and TIC is the content of total carbon (TC) [12].…”
Section: Physicochemical Analysismentioning