Summary for Field Activity Number 84024

Alternate Leg: ID (159)

Area of Operations : Southern New England Shelf and Slope,Massachusetts, United States, North America, North Atlantic

Dates: November 13, 1984 to November 20, 1984

Chief scientist: Brad Butman
   

Objectives: 1) To recover an array of current meters and bottom instruments deployed on the Continental Slope in March 1984 (Slope Array III); 2) Conduct a hydrographic survey across the outer shelf and upper slope between 68 and 71 degrees W.

Type of Activity: Mooring work;

Information to be derived: Times series data;Samples and Chemical Analysis;

Summary: Moorings recovered: 7(#277,278,279,280,281,282 all deployed #84004 OCEANUS 149 Mar 12-19, 1984; #283 deployed #84031 OCEANUS 154 May 16-23, 1984). OC159 was the last in a series of 3 cruises conducted as part of a USGS program to study currents and sediment transport on the Continental Slope. The program is supported by the USGS and by the Minerals Management Service. Despite the weather, all major scientific objectives were accomplished. All moorings were recovered and a moderate CTD survey was completed. One section was repeated 3 times during the cruise which should illustrate temporal changes in suspended sediment during typical storm conditions. A 1-m Sea Tech transmissometer was used to make suspended sediment observations. The oxygen sensor on the CTD failed early in the cruise.

USGS Project Number:

Contact: Brad Butman (bbutman@usgs.gov)

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