Concentrations of organic compounds in suspended matter from surface waters and surface layer bottom sediments of the Obskay Guba (Ob River estuary) and the Kara Sea

• Main Author: Nemirovskaya, Inna A
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: Akademik Mstislav Keldysh; AMK54; AMK54-4946; AMK54-4948; AMK54-4950; AMK54-4952; AMK54-4955; AMK54-4956; AMK54-4957; AMK54-4958; AMK54-4960; AMK54-4969; AMK54-4970; AMK54-4971; AMK54-4972; AMK54-4974; AMK54-4975; AMK54-4979; AMK54-4983; AMK54-4988; AMK54-4990; AMK54-4993; AMK54-4993GR; AMK54-4994; AMK54-4995; AMK54-4996; AMK54-4996GR; AMK54-4999; AMK54-4999GR; AMK54-5000; AMK54-5000GR; AMK54-5001; AMK54-5001GR; AMK54-5002; AMK54-5003; AMK54-5004; AMK54-5004GR; AMK54-P10; AMK54-P9; Archive of Ocean Data; ARCOD; Grab; Kara Sea; MULT; Multiple investigations; Ob River mouth area; Obskaya Guba; ob river
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.767621; https://doi.org/10.1594/PANGAEA.767621

Data are presented on concentrations of aliphatic and polycyclic aromatic hydrocarbons (AHC and PAH) in interstitial waters and bottom sediments of the Kara Sea compared to distribution of particulate matter and organic carbon. It was found that AHC concentrations within the water mass (aver. 16 µg/l) are mainly formed by natural processes. Distribution of AHC represents variability of hydrological and sedimentation processes in different regions of the sea. The widest ranges of the concentrations occurred in the Obskaya Guba - Kara Sea section: in water (10-310 µg/l for AHC and 0.4-7.2 ng/l for PAH) and in the surface layer of the bottom sediments (8-42 µg/l for AHC and 9-94 ng/g for PAH). Differentiation of hydrocarbons (HC) in different media follows regularities typical for marginal filters; therefore no oil and pyrogenic compounds are supplied to the open sea. In sediments contents of HC depend on variations in redox conditions in sediments and on their composition.