Wednesday, August 12", 2015 
v 03:08 — 03:25 Station GNO0018S: 
CTD profile with rosette sampler 
W&S 05:00: Bft. 1, 230°, 1025 hPa, Ta = 16.9 °C, cloudy. Tw= 17.1 °C, 34.47 psu. 
06:43 — 06:55 Station GN019 (Doggerbank): 
Secchi depth, CTD profile with rosette sampler and nutrients. 
The CTD was covered with jellyfish and had to be cleared with sea water. 
W&S 10:00: Bft. 0, -°, 1026 hPa, Ta = 17.2 °C, clear sky. Tw = 17.1 °C, 34.59 psu. 
vv 10:20 — 10:34 Station GN0019S: 
Secchi depth and CTD profile with rosette sampler. 
W&S 14:00: Bft. 2, 70°, 1026 hPa, TA = 20.1 °C, clear sky. Tw= 17.6 °C, 34.63 psu. 
14:16 — 14:35 Station GNO020 (east of Doggerbank): 
Secchi depth and CTD profile with rosette sampler. RA: Cs-137. Nutrients. 
TN 17:00 — 17:45: Tow of the neuston net for micro plastics with 3 kn. 
W&S 18:00: Bft. 3, 60°, 1025 hPa, TA = 19.8 °C, clear sky. Tw= 18.0 °C, 34.44 psu. 
18:30 — 18:42 Station GN021/AWZW2 (Nordschillgrund): 
Secchi depth and CTD profile with rosette sampler. RA: Cs-137. Nutrients. 
23:06 — 23:18 Station GNO022 (Weiße Bank): 
CTD profile with rosette sampler. RA: Cs-137. 
Thursday, August 13", 2015 
v 02:09 — 02:21 Station GNO022A: 
CTD profile with rosette sampler. 
04:40 — 04:58 Station GNO023: 
Secchi depth, CTD profile with rosette sampler and nutrients. 
W&S 05:30: Bft. 5, 80°, 1024 hPa, TA = 15.5 °C, clear sky. Tw= 18.4 °C, 31.42 psu. 
07:19 — 07:31 Station GN025 (west of Sylt): 
Secchi depth and CTD profile with rosette sampler. RA: Cs-137, Sr-90, Pu, H-3. 
Nutrients. 
W&S 11:00: Bit. 3, 70°. 1023 hPa, Ta = 18.9 °C, clear sky. Tw = 18.5 °C, 32.35 psu. 
Between Horns Rev and GN026 strong red tides in form of patched and extended 
stripes along oceanic frontal zones known from ocean colour satellite data have been 
observed. 
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