Arctic rivers are labeled and ranked in order of decreasing discharge: Yenisei (1), Lena (2), Ob (3), and Mackenzie (4). River-influenced margins of the Arctic are labeled: Gulf of Ob (GO), Kara Sea (KS), [...] different fractions of DOM. The traditional “peak-picking” method for EEM has identified humic-like (the so called A, C, M peaks) and protein-like fluorescence peaks (B, T peaks) using simple excitation-emission [...] the Atlantic Ocean basin. However, no study addressing this hypothesis has been conducted/published so far. The main goal of this project is to determine the composition/sources and fate of the dissolved