Dataset: Turbulence microstructure profiles
Deployment: HRS2204

This cruise visited eight stations on the Northeastern U.S. Continental Shelf. Latitudes and Longitudes provided per sample in the data, but general station descriptions are below. Turbulence microstructure profiles were only obtained at stations deep enough for free-fall profiling. These stations included Station 1, 2, 3, 4, and 8.

• Station 1 - Station 3: Georges Bank near the Gulf of Maine. Approximate location was 41.7 N, 68 W. Samples acquired from 0 m to 25 m depths.
• Station 4: The Great South Channel near the Gulf of Maine. Approximate location was 41.6 N, 69 W. Samples acquired from 0 m to 150 m depths.
• Station 5: Only one CTD profile was taken before this station was aborted due to weather. No data acquired. Station location was 40.8 N, 70.5 W.
• Station 6: Off the coast of Martha's Vineyard. Approximate location was 41.3 N, 70.5 W. Samples acquired from 0 m to 10 m depths.
• Station 7: At the mouth of the Sakonnet River near Newport, Rhode Island. Approximate location was 41.5 N, 71.2 W. Samples acquired from 0 m to 10 m depths.
• Station 8: Hudson Canyon near New York. Approximate location was 39.5 N, 72.3 W. Samples acquired from 0 m to 200 m depths.

Turbulence dissipation rate profiles were obtained following standard deployment techniques for the Rockland Scientific VMP-250 instrument. This instrument free-falls through the water column and measures shear spectra from piezo-electric probes. The instrument was deployed attached to a PID-02 free-fall winch and slightly negatively-buoyant tether to eliminate the influence of tether drag. Two shear probes (calibrated by Rockland within 2 mos of deployment) were installed on the instrument along with one temperature microstructure sensor. For deployment, the instrument was lowered into the water and held at the surface prior to release. The instrument was allowed to free-fall until close to bottom before bringing it back to the surface. the tether was manually fed out of the free-fall winch during the profile and one loop was maintained on the water surface to minimize tether drag on the instrument. Three profiles at each deployment were obtained prior to instrument recovery.