Samples from surface microlayer (SML) and undelying water (ULW) were collected in selected stations in the Southern of the North Sea. Samples were stored in cool container (< 10°C via freezer packs) and transported to the lab in the same day. Excitation Emission matrix (EEM) measurements were perfomed with a Perkin Elmer Fluorometer L55.Excitation wavelength was fixed in a spectral range of 200 nm to 400 nm, with steps of 5 nm. EEMs were recorded over a wavelength range of 220 nm to 600 nm, with 5-nm steps.

NoStds = Number of standardsNoSamples = Number of samplesNoScanDims = Number of scan dimensionsNoScanPoints(1) = Number of scan points (1)NoScanPoints(2) = Number of scan points (2)CalibType = calibration typeScanType1 = Scan type (1)WLStart1 = Wavelength start (1)WLEnd1 = Wavelength end (1)ScanType2 = Scan type (2)WLStart2 = Wavelength start (2)WLEnd2 = Wavelength end (2)WLSpeed1 = wavelength speed (1)WLStep2 = wavelength step (2)LumMode = Luminiscense modePhosDelay = Phosphorescense delayPhosGate = Phosphorescense gatePhosCycle = Phosphorescense cyclePhosFlash = Phosphorescense flashExCorr = Excitation correctionExWl = Excitation wavelength (nm)EmWl = Emission wavelength (nm)ExSlit = Excitation slitEmSlit = Emmision slitEmCutFilter = Emmision cutting filterEmMirror = emission mirrorExFilter = Excitation filter EmFilter = Emision filterIntTime = Integration timeInt [200] = Intensity of signal at the excitation wavelength (counts).

Supplement to: Miranda Montenegro, Mario Luis; Mustaffa, Nur Ili Hamizah; Robinson, Tiera-Brandy; Stolle, Christian; Ribas-Ribas, Mariana; Wurl, Oliver; Zielinski, Oliver (2018): Influence of solar radiation on biogeochemical parameters and fluorescent dissolved organic matter (FDOM) in the sea surface microlayer of the southern coastal North Sea. Elementa - Science of the Anthropocene, 6(1), 15