Dissolved organic matter in the Lena River Delta Region, Siberia, Russia ...

• Main Authors: Gonçalves-Araujo, Rafael, Stedmon, Colin A, Heim, Birgit, Dubinenkov, Ivan, Kraberg, Alexandra Claudia, Moiseev, Denis, Bracher, Astrid
• Format: Dataset
• Language: English
• Published: PANGAEA 2015
• Subjects: Event label; Date/Time of event; Latitude of event; Longitude of event; Elevation of event; DEPTH, water; Temperature, water; Salinity; Fluorescence intensity, maximum, DOM; Absorption coefficient, 350 nm; Absorption coefficient, 443 nm; Spectral slope of colored dissolved organic matter absorption; Ratio; Specific ultraviolet absorbance normalized to DOC; Humification index; Biological index; Fluorescence index; Multiple investigations; RU-Land_2013_Lena; AWI Arctic Land Expedition; Climate change; laptev; Laptev Sea; lena delta; lena river; Siberia
• Online Access: https://dx.doi.org/10.1594/pangaea.844928; https://doi.pangaea.de/10.1594/PANGAEA.844928

Connectivity between the terrestrial and marine environment in the Artic is changing as a result of climate change, influencing both freshwater budgets and the supply of carbon to the sea. This study characterizes the optical properties of dissolved organic matter (DOM) within the Lena Delta region and evaluates the behavior of DOM across the fresh water-marine gradient. Six fluorescent components (four humic-like; one marine humic-like; one protein-like) were identified by Parallel Factor Analysis (PARAFAC) with a clear dominance of allochthonous humic-like signals. Colored DOM (CDOM) and dissolved organic carbon (DOC) were highly correlated and had their distribution coupled with hydrographical conditions. Higher DOM concentration and degree of humification were associated with the low salinity waters of the Lena River. Values decreased towards the higher salinity Laptev Sea shelf waters. Results demonstrate different responses of DOM mixing in relation to the vertical structure of the water column, as ... : Supplement to: Gonçalves-Araujo, Rafael; Stedmon, Colin A; Heim, Birgit; Dubinenkov, Ivan; Kraberg, Alexandra Claudia; Moiseev, Denis; Bracher, Astrid (2015): From fresh to marine waters: characterization and fate of dissolved organic matter in the Lena River delta region, Siberia. Frontiers in Marine Science, 2(108), 13 pp ...