Keywords: AC3; Arctic Amplification; ARK-XXIX/2.2; CT; DATE/TIME; DEPTH, water; FRAM; FRontiers in Arctic marine Monitoring; LATITUDE; LONGITUDE; Optical beam attenuation coefficient, 401 nm; Optical beam attenuation coefficient, 404.6 nm; Optical beam attenuation coefficient, 407.5 nm; Optical beam attenuation coefficient, 410.5 nm; Optical beam attenuation coefficient, 413.9 nm; Optical beam attenuation coefficient, 417.3 nm; Optical beam attenuation coefficient, 421.2 nm; Optical beam attenuation coefficient, 425.3 nm; Optical beam attenuation coefficient, 429 nm; Optical beam attenuation coefficient, 432.9 nm; Optical beam attenuation coefficient, 436.4 nm; Optical beam attenuation coefficient, 440.5 nm; Optical beam attenuation coefficient, 444.4 nm; Optical beam attenuation coefficient, 448.8 nm; Optical beam attenuation coefficient, 453 nm; Optical beam attenuation coefficient, 457.3 nm; Optical beam attenuation coefficient, 461.3 nm; Optical beam attenuation coefficient, 465.5 nm; Optical beam attenuation coefficient, 469.8 nm; Optical beam attenuation coefficient, 474.3 nm; Optical beam attenuation coefficient, 479.4 nm; Optical beam attenuation coefficient, 483.6 nm; Optical beam attenuation coefficient, 487.9 nm; Optical beam attenuation coefficient, 492 nm; Optical beam attenuation coefficient, 496.1 nm; Optical beam attenuation coefficient, 500.5 nm; Optical beam attenuation coefficient, 504.7 nm; Optical beam attenuation coefficient, 509.4 nm; Optical beam attenuation coefficient, 514 nm; Optical beam attenuation coefficient, 518.9 nm; Optical beam attenuation coefficient, 523.2 nm; Optical beam attenuation coefficient, 527.5 nm; Optical beam attenuation coefficient, 531.5 nm; Optical beam attenuation coefficient, 535.8 nm; Optical beam attenuation coefficient, 539.7 nm; Optical beam attenuation coefficient, 544 nm; Optical beam attenuation coefficient, 548.5 nm; Optical beam attenuation coefficient, 552.4 nm; Optical beam attenuation coefficient, 557.2 nm; Optical beam attenuation coefficient, 561.5 nm; Optical beam attenuation coefficient, 565.6 nm; Optical beam attenuation coefficient, 569.8 nm; Optical beam attenuation coefficient, 573.2 nm; Optical beam attenuation coefficient, 577.1 nm; Optical beam attenuation coefficient, 580.8 nm; Optical beam attenuation coefficient, 582.9 nm; Optical beam attenuation coefficient, 586.4 nm; Optical beam attenuation coefficient, 590.5 nm; Optical beam attenuation coefficient, 594.7 nm; Optical beam attenuation coefficient, 598.9 nm; Optical beam attenuation coefficient, 603.1 nm; Optical beam attenuation coefficient, 607.5 nm; Optical beam attenuation coefficient, 611.8 nm; Optical beam attenuation coefficient, 615.9 nm; Optical beam attenuation coefficient, 620.2 nm; Optical beam attenuation coefficient, 624.2 nm; Optical beam attenuation coefficient, 627.9 nm; Optical beam attenuation coefficient, 632 nm; Optical beam attenuation coefficient, 635.8 nm; Optical beam attenuation coefficient, 640 nm; Optical beam attenuation coefficient, 644 nm; Optical beam attenuation coefficient, 648.1 nm; Optical beam attenuation coefficient, 652.2 nm; Optical beam attenuation coefficient, 656.3 nm; Optical beam attenuation coefficient, 660.6 nm; Optical beam attenuation coefficient, 664.7 nm; Optical beam attenuation coefficient, 668.8 nm; Optical beam attenuation coefficient, 672.9 nm; Optical beam attenuation coefficient, 676.8 nm; Optical beam attenuation coefficient, 680.4 nm; Optical beam attenuation coefficient, 684 nm; Optical beam attenuation coefficient, 687.7 nm; Optical beam attenuation coefficient, 691.1 nm; Optical beam attenuation coefficient, 694.7 nm; Optical beam attenuation coefficient, 698.1 nm; Optical beam attenuation coefficient, 701.5 nm; Optical beam attenuation coefficient, standard deviation; Polarstern; PS93.2; PS93.2-track; Spectrophotometer, WET Labs, Inc., AC-S; Underway cruise track measurements