Keywords: Absorption coefficient, colored dissolved organic matter at 254 nm; Absorption coefficient, colored dissolved organic matter at 260 nm; Absorption coefficient, colored dissolved organic matter at 350 nm; Absorption coefficient, colored dissolved organic matter at 375 nm; Absorption coefficient, colored dissolved organic matter at 400 nm; Absorption coefficient, colored dissolved organic matter at 412 nm; Absorption coefficient, colored dissolved organic matter at 440 nm; Absorption coefficient, colored dissolved organic matter at 443 nm; AWI_Envi; AWI_Perma; AWI Arctic Land Expedition; Bikovskaya Channel, Lena Delta, Siberia, Russia; Date/Time of event; DEPTH, water; Event label; Latitude of event; LD13_A_22_0m; LD13_A_23_2m; LD13_A_27_0m; LD13_A_29_0m; LD13_A_30_3m; LD13_A_31_0m; LD13_A_32_5m; LD13_A_34; LD13_A_63; LD13_A_64; LD13_A_65; LD13_A_66; LD13_H_01; LD13_H_03; LD13_H_04; LD13_H_06; LD13_H/A_05; LD13_IA_01_0m; LD13_IA_02_7m; LD13_IA_03_4m; LD13_IA_07_0m; LD13_IA_08_4m; LD13_IA_09_2m; LD13_IA_16_0m; LD13_IA_17_5m; LD13_IA_18_0m; LD13_IA_19_8m; LD13_IA_20_0m; Lena2013; Lena River, Lena Delta, Siberia, Russia; Location of event; Longitude of event; Olenekskaya Channel, Lena Delta, Siberia, Russia; Permafrost Research; Polar Terrestrial Environmental Systems @ AWI; RU-Land_2013_Lena; Spectral slope of colored dissolved organic matter absorption, 275-295 nm; Spectral slope of colored dissolved organic matter absorption, 300-500 nm; Spectral slope of colored dissolved organic matter absorption, 350-400 nm; Spectral slope of colored dissolved organic matter absorption ratio; Tumatskaya Channel, Lena Delta, Siberia, Russia