Keywords: ammonium; Ammonium; Calculated; Calculated: DGPS surface elevation - depth below sediment surface; Calculated: NOx - NO2; Calulated: NOx + NH4; Coastal section; Conductivity probe; Conductivity probe with integrated temperature sensor; CSEC; DATE/TIME; DEPTH, sediment/rock; DGPS; estimated for North Beach Seawater; ELEVATION; Event label; Flow through cell; optical measurement (PyroScience); High Energy Beach; iron; Iron; LATITUDE; LONGITUDE; manganese; Manganese; Mass spectrometry; nitrate; Nitrate; Nitrate and Nitrite; nitrite; Nitrite; Nitrogen, inorganic, dissolved; North Sea; Oxygen; Photometric; POINT DISTANCE from start; Salinity; Spiekeroog_S2_T1-174B; Spiekeroog_S2_T1-188; Spiekeroog_S2_T1-191; Spiekeroog_S2_T1-7; Spiekeroog_S2_T1-78; Spiekeroog_S2_T2-13; Spiekeroog_S2_T2-143; Spiekeroog_S2_T2-164; Spiekeroog_S2_T2-169; Spiekeroog_S2_T2-72; Spiekeroog_S2_T3-210; Spiekeroog_S2_T3-229; Spiekeroog_S2_T3-230; Spiekeroog_S2_T3-249-230; Spiekeroog_S2_T3-249-231; Spiekeroog_S2_T3-249-232; Spiekeroog_S2_T3-249-233; Spiekeroog_S2_T3-270; Spiekeroog_S2_T3-291; Spiekeroog_S2_THR-12; Spiekeroog_S2_THR-15; Spiekeroog_S2_THR-18; Spiekeroog_S2_THR-21; Spiekeroog_S2_THR-24; Spiekeroog_S2_THR-27; Spiekeroog_S2_THR-3; Spiekeroog_S2_THR-30; Spiekeroog_S2_THR-33; Spiekeroog_S2_THR-36; Spiekeroog_S2_THR-39; Spiekeroog_S2_THR-42; Spiekeroog_S2_THR-45; Spiekeroog_S2_THR-48; Spiekeroog_S2_THR-51; Spiekeroog_S2_THR-57; Spiekeroog_S2_THR-6; Spiekeroog_S2_THR-9; Spiekeroog, German Bight, North Sea; Station label; subterranean estuary; Temperature, water; Transect; UTM Easting, Universal Transverse Mercator; UTM Northing, Universal Transverse Mercator