Journals 2005/2006

James J. Dornicik
Ward Melville High School, East Setauket, New York

"Investigating Vertical Mixing at Eddy A4" R/V Oceanus July 14 - August 5, 2005

Journal Index: July 14 - 15 - 16 - 17 - 18 - 19 - 20        21 - 22 - 23 - 24 - 25 - 26 - 27         28 - 29 - 30 - 31 August 1 - 2 - 3 - 4 - 5

July 29, 2005
Analyzing the water samples, prepping the sampling sled, and redeployment of the sampling sled

The sampling sled came out of the water at 08:00 hours. All the water samples were removed and tested for the presence of SF6.

SF6 our tracer was detected in several of the samples. The depth of the tracer varies due to the sled following a density profile. To give move clarity to where it was found the integrated samplers that were located on the sled at a depth of around 100m showed a large concentration of sample. Quantifiable amounts of tracer were detected 3m below, 3.8 meters above, 7.2 meters above the sled and 10.2 meters above the sled. The syringes on the medusa carousel were better able to tell us when we passed through the tracer. On analysis it was determined that we crossed the tracer path in the last thirty minutes of the tow.

The rest of the day was used to reset all the equipment and get it ready for redeployment.

At 20:30 we deployed the sampling sled and set our tow.