Fluorescent dissolved organic matter (FDOM) intensity (Parafac components and FDOM indices) in the surface water of the Mackenzie Delta Region during 4 expeditions from spring to fall in 2019


Fluorescent dissolved organic matter intensity was measured with an Aqualog®. Measurements were corrected for inner-filter effects and for the Raman and Rayleigh scattering (Murphy et al., 2013; doi:10.1039/C3AY41160E). The different fluorescent components of DOM were isolated from combined signal by PARAFAC modeling using the “drEEM Toolbox” and following the recommendation of Murphy et al. (2013; doi:10.1039/C3AY41160E). The DOM components derived from PARAFAC modeling were compared with PARAFAC components from other studies through the OpenFluor database (Murphy et al., 2014; doi:10.1039/C3AY41935E). The coble-peaks indicate major fluorescent components (Coble 1996; doi:10.1016/0304-4203(95)00062-3) in marine FDOM EEMs (Excitation-Emission-Matrix). Peaks T represents protein-like compounds (tyrosine and tryptophane), peaks A and C are indicators of humic-like components whereas peak M was associated to marine humic-like fluorescence. The fluorescence index (FI) is calculated as the ratio of fluorescence at emission 450 nm and 500 nm, at fixed excitation of 370 nm. The HIX index is the ratio of the areas of two spectral wavelength regions in the emission spectra for an excitation at 254 nm and it is obtained as: HIX = H∕L, where H is the area between 435 and 480 nm in the emission spectra and L is the area in the emission spectra between 300 and 345 nm (Zsolnay et al., 1999; doi:10.1016/S0045-6535(98)00166-0). The BIX index is obtained by calculating the ratio of the emission at 380 and 430 nm, excited at 310 nm: BIX = IEm380∕IEm430 (Huguet et al., 2009; doi:10.1016/j.orggeochem.2009.03.002).

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DOI https://doi.org/10.1594/PANGAEA.937582
Related Identifier IsPartOf https://doi.org/10.1594/PANGAEA.937587
Related Identifier References https://doi.org/10.5194/essd-2022-163
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.937582
Creator Matsuoka, Atsushi ORCID logo; Juhls, Bennet ORCID logo; Bécu, Guislain ORCID logo; Oziel, Laurent ORCID logo; Leymarie, Edouard; Lizotte, Martine ORCID logo; Ferland, Joannie; Béguin, Marine; Laberge-Carignan, Audrey; Guilmette, Caroline; Maury, Juliette; Hilborn, Andrea; Tisserand, Lucas; Devred, Emmanuel; Doxaran, David ORCID logo; Bossé-Demers, Thomas; Gonçalves-Araujo, Rafael ORCID logo; Stedmon, Colin A ORCID logo; Babin, Marcel ORCID logo
Publisher PANGAEA
Publication Year 2021
Funding Reference Horizon 2020 https://doi.org/10.13039/501100007601 Crossref Funder ID 773421 https://cordis.europa.eu/project/id/773421 NUNATARYUK, Permafrost thaw and the changing Arctic coast, science for socioeconomic adaptation
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 1702 data points
Discipline Biogeochemistry; Biospheric Sciences; Geosciences; Natural Sciences
Spatial Coverage (-138.135W, 68.264S, -133.031E, 69.649N); Mackenzie Delta, Canada
Temporal Coverage Begin 2019-04-20T15:34:00Z
Temporal Coverage End 2019-09-08T12:00:00Z