Srulise Report, RV ATAIR, Cruise 0671013-1, Bremerhaven - Skagen - Aberdeen, 19 Jul - 11 Aug 2022 
departed from Bremerhaven, Germany, on 19 July arriving in the port of Skagen, Denmark, on 
31 July (see Figure 1.1). The vessel remained in the port from 31 July to 2 August to exchange 
srew members and scientific participants (see Section 2). The cruise was resumed on 2 Au- 
gust, when the vessel departed from Skagen to pursue the second leg of the cruise in the 
northern part of the North Sea. The cruise ended when the vessel arrived in Aberdeen, UK, on 
11 August 2022. 
In addition to the standard stations that cover the North Sea region, cruise 067/013-1 also 
served to conduct station work in the Skagerrak region and in the Minch, which is located 
between the Hebrides and the Scottish mainland. It also covered the northwesternmost part of 
the area under investigation, which is located at the edge of the western Scottish shelf break. 
The major purpose of cruise 067/013-1 based on respective measurement data is to assess 
the state of the North Sea in summer 2022 with focus on the physical state. Large-scale data 
will contribute to the investigation of the hydrographic state of the water column in different 
regions of the North Sea. Furthermore, temporal changes in the hydrography, which become 
apparent when the data is considered alongside data from previous cruises, will be addressed. 
Sampling water for radionuclide analysis is part of the BSH’s standard monitoring of radioactive 
sontamination in the North Sea. This is based on several legal and regulatory provisions, as 
well as the corresponding requirements for fulfilling them. The sampling will assess spatial 
changes in the concentrations of these radionuclides, as well as changes over time compared 
to previous cruises. Particular objectives related to cruise 067/013-1 addressing the state of 
the North Sea in 2022 are the following: 
How far does the Atlantic Water (AW) that enters the North Sea at its northern limits 
oropagate southward in summer 2022? 
Nhere does the main inflow take place? 
4Yow far does AW entering the southern North Sea via the English Channel penetrate 
northwards in summer 2022? 
What is the respective regional sharpness and depth of the thermocline? 
Nhat is the total salt and heat content of the North Sea in summer 2022? 
Where is the Baltic outflow located? 
What is the lateral distribution and concentration level of selected radionuclides in 
summer 2022? 
Overarching objectives that address temporal changes on different time scales are: 
How do changes in the Northeast Atlantic happening on time scales ranging from 
seasonal to decadal affect the North Sea? 
Which processes are linked to the variability in the North Atlantic Oscillation (NAO) and 
to what extent? 
Chlorophyll sampling carried during the cruise will serve for improving remote-sensing prod- 
ucts and satellite sensor validation by means of comparison with in situ data.