be performed although during complex cloud conditions over the sea ice north of Svalbard. First, a thin low cloud layer was probed north of the Whaler’s Bay polynya with no mid-level clouds above it. Further [...] Saturday 30th March. Sunday, 24th March To reach the scientific goals of our campaign we need data over sea ice in cloudy conditions but also over open water. Moreover, we are interested in the effect of clouds [...] conditions were good enough to perform a flight over both the ice free part of Fram Strait but also over sea ice, this time up to 83° N. Moreover, strong wind is helpful for the turbulence measurements since