Sunday, September 2"7, 2018 
03:00 Filling of a 600 liter container with sea water for M31 group. 
04:06 — 04:40 Station GNO020 (east of Doggerbank): 
CTD profile with rosette sampler. 
pH value, alkalinity, chlorophyll and O, at 5 m depth and about 3 m above bottom. 
RA: Cs-137, Sr-90, Pu, H-3. 
OG: 1x100 L nonpolar, 1x10 polar, 5 m depth. 
W&S: Bft. 4, 180°, 1027 hPa, Ta = 17.0 °C, fine, Tw= 17.3 °C, S = 34.70 psu. 
08:04 — 23:41 Station GN021/AWZW2 (Nordschillgrund): 
Secchi depth, CTD profile with rosette sampler. 
pH value, alkalinity, chlorophyll and O, at 5 m depth and about 3 m above bottom. 
RA: Cs-137. 
W&S: Bft. 3, 170°, 1028 hPa, Ta = 17.8 °C, fine, Ty = 17.4 °C, S = 34.44 psu 
12:17 — 12:55 Station GN022 (Weiße Bank): 
Secchi depth, CTD profile with rosette sampler. 
pH value, alkalinity, chlorophyll and O, at 5 m depth and about 3 m above bottom. 
RA: Cs-137. 
OG: 1x100 L nonpolar, 1x10 L nonpolar, 1x10 L polar, 5 m depth. 
W&S: Bft. 2, 140°, 1028 hPa, Ta = 20.3 °C, fine, Tw = 18.6 °C, S = 34.42 psu. 
Sample bottle with Bedford ID 184072 (position 3 of release unit) was not closed. 
15:22 — 15:57 Station GNO022A: 
Secchi depth, CTD profile with rosette sampler. 
RA: Cs-137. 
OG: 1x100 L nonpolar, 1x10 L polar, 5 m depth. 
W&S: Bft. 2, 20°, 1027 hPa, Ta = 21.6 °C, fine, Tw= 18.7 °C, S = 33.56 psu. 
18:10 — 18:31 Station GNO23: 
Secchi depth, CTD profile with rosette sampler. 
pH value, alkalinity, chlorophyll and O, at 5 m depth and about 3 m above bottom. 
RA: Cs-137, Sr-90, Pu, H-3 
OG: 1x100 L nonpolar, 1x5 L polar, 5 m depth.. 
W&S: Bft. 4, 30°, 1026 hPa, Ta = 18.7 °C, fine, Tw= 18.8 °C, S = 32.32 psu. 
20:26 — 20:48 Station GNO024: 
CTD profile with rosette sampler. 
pH value, alkalinity, chlorophyll and O, at 5 m depth and about 3 m above bottom. 
RA: — 
OG: 1x100 L nonpolar, 1x5 L polar, 5 m depth. 
W&S: Bft. 3, 90°, 1026 hPa, Ta = 19.1 °C, fine, Tw= 19.1 °C, S = 31.91 
22:00 — 22:22 Station GN025 (west of Sylt): 
CTD profile with rosette sampler. 
oH value, alkalinity, chlorophyll and O, at 5 m depth and about 3 m above bottom. 
RA: Cs-137, Sr-90, Pu, H-3. 
OG: 1x100 L nonpolar, 1x5 L polar, 5 m depth. 
W&S: Bft. 3, 70°, 1026 hPa, Ta = 18.1 °C, obscured sky, T= 18.6 °C, S = 32.04 psu. 
PSU. 
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