Our primary goal is to understand how the long travel of phosphorus-containing particles through the deep, deep waters of the open Atlantic Ocean changes the properties of these particles, and by that the potential for marine algae to get access to the yummy phosphorus. An interesting angle is that as you go deeper, some phosphorus-containing minerals start to dissolve (and release phosphorus) by an effect that is similar to ocean acidification; this might help us to shed light on the behavior of phosphorus in an acidified ocean under high CO2, which no one really knows. We will throw heaps of equipment at achieving our goal: water and sediment sampling devices, NIOZ-built autonomous systems that can measure chemical processes in the seafloor at 5 km depth, long cables with systems that collect sinking material (including the associated phosphorus) at different depths, and more. Check this space for updates by the cruise participants and who knows, maybe a first glimpse of some exciting new discoveries!