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Cruise Report, RV ATAIR, Cruise 0671013-1, Bremerhaven - Skagen - Aberdeen, 19 Jul - 11 Aug 2022 
54 
Water Sampling with respect to Density 
Water sampling with respect to density analysis was carried out on selected stations. Similarly 
to salinity, water samples were taken from the Niksin bottles that were closed near the surface 
at 5 dbar and close to the bottom. Numbered glass bottles were used and rinsed three times 
with seawater before finally filling the bottle. The sample was made air-tight by closing the 
bottle with a rubber plug and attaching a metal seal on top. All samples were given a BSH 
sample Identification number similar to Bedford numbers. Back at the home lab, density 
samples were analysed with a densitymeter of type Mett/er Toledo Excellence D6. In total, 46 
samples taken from station locations distributed all across the North Sea were analysed for 
density. Figure 5.2 presents the station locations with density sampling carried out during 
zruise 067/013-1. There are no density samples from the Dutch EEZ. The purpose of the 
density sampling and analysis is to build up a density database for the North Sea for the sake 
of obtaining absolute salinity data, Sa. These should be based on density measurements that 
san be traced back to SI units, a prerequisite when considering the Thermodynamic Equation 
of Seawater 2010 (TEOS-10). 
61°N - 
At 
Density 
Sampling @®@ 
539 — 
„7° P 
NO4R 
AN 
55° 
53° = 
RV Atair 
Sruise 0671013-1 
*y Jul - 11 Aug 2022 
Par havan Skanan Ahkrnaarn 
51 > T 4 
8°W 6° 
A° 
2° 
0° 
° 
4° 
6° 
8° 
5 — 
10° 12°E 
Figure 5.2. Distribution of stations carried out during cruise 0671013-1 with density sampling (red dots).