|What happens at a hydrographic station during the small-scale survey?
The helicopter lands on the sea ice, near open water or thin ice.
(2) A small winch is used to lower a Seabird CTD-O2 instrument down to ~550 m or the bottom, whichever comes first. This provides profiles of temperature, salinity, and dissolved oxygen as a function of depth.
(3) An XCP is deployed in the hole, providing a profile of how currents change with depth.
(4) A Niskin bottle is used to take a sample of water at ~6 m depth, to be analyzed later for salinity, dissolved nutrients and barium, and oxygen isotopes.
Then we take off and fly to another site or back to home base!