8 Cruise Report, RV ATAIR, Cruise 067I033-1, Bremerhaven – Thybor?n – Aberdeen, 23 Jul – 15 Aug 2024 ? Which processes are linked to the variability in the North Atlantic Oscillation (NAO) and to what extent? Chlorophyll-a and phytoplankton sampling carried during the cruise and analysis of selected samples will serve for improving remote-sensing products and satellite sensor validation by means of comparison with in-situ data.