Monday morning the dive hut was moved from Station 68 to Station 57 and the divers collected sediment samples. The first photo shows typical sediment processing, from left to right Marietta Cleckley (putting samples in the cooler), Kristi Jones (retrieving the small push core for extrusion), Sally Morehead (extruding the large push core), and Stephen Sweet (opening a container for the sample Sally is extruding).
The next photo shows a close up of small push core sampling. The sample is extruded, put in a petrie dish, and then the cooler for transport back to the Crary Laboratory. This sample will be analyzed on-site for toxicity and coliforms.

Station Sediment Sampling

Water sampling at a station involves taking a vertical profile of the water column using an in situ CTD (Conductivity-Temperature-Depth) instrument. The CTD is placed on the line and is slowly lowered to the bottom.The next figure shows Andrew Klein lowering the CTD at this station.

After the CTD cast is taken, a bottle cast is performed.5 liter Niskin water sampling bottles are lowered to just below the ice, to mid depth, and to near the bottom on 3 successive casts. The bottle is tripped at the appropriate depth and the bottle is brought to the surface and sampled. The following photo shows the bottle being recovered, with from left to right Sally Morehead (ready to sample), Stephen Sweet (accepting the bottle) and Guy Denoux. The first sample drawn from the Niskin Bottle is the oxygen sample, followed by nutrients, salinity, chlorophyll a, and coliform samples. The bottle is being sampled by Marietta in the next photo and by Kristi in the final photo.

Water sampling at the station