USGS Coastal and Marine Geology Program

Coastal & Marine Geology Program

Field Activity Details for field activity 1978-018-FA

Other ID: none

Status: Completed

Organization(s): USGS, Woods Hole Coastal and Marine Science Center

Funding Program(s):

Location: South Carolina shelf, United States, North America, North Atlantic;

Principal Investigator(s): Bradford Butman

Affiliate Investigator(s):

Information Specialist(s):

Data Type(s): Environmental Data: Temperature, Imagery: Photo, Sampling: Biology, Sampling: Geology, Time Series: Mooring (physical oceanography)

Scientific Purpose/Goals: The WHITEFOOT cruise was part of a continuing study of currents and sediment transport on the U.S. east coast continental shelf. The purpose of the cruise was to recover 2 bottom tripods and deploy 1 tripod on the South Carolina shelf, to conduct hydrographic observations (XBT), to relight 2 surface marker buoys at the tripod site locations, and to obtain samples of surface sediments at the tripod locations.

Vehicle(s):

Start Date: 1978-07-13

Start Port/Location: Georgetown, SC

End Date: 1978-07-14

End Port/Location: Georgetown, SC

Equipment Used: XBT, Camera- deep sea, Grab sampler, Bottom tripod

Information to be Derived: Time series data;

Summary of Activity and Data Gathered: Mooring condition: The tripod had moderate biological growth on the frame and instrument housings. The camera window had several barnacles and a light coating of slime. The transmissometer prism also had a light coating of slime. Some aluminum oxide corrosion had formed on the transmissometer light port. The current rotor and vane were free. There was some difficulty in recovering the tripod through a rear A-frame installed on the WHITEFOOT. The current sensor was damaged on recovery. Although it took several minutes to get the tripod aboard, quick visual observation of the instrument in the water showed several fish inhabiting the savonius rotor current sensor. Crabs, one small octopus, and several fish also inhabited the corner box frames, open structural pipes, and top lifting plate of the tripod. The camera strobe would not fire on deck, indicating malfunction or low batteries. Moorings recovered: 1 (#147 deployed FA 78009 ISELIN Apr. 10-15, 1978). Moorings deployed: 2 (#152 recovered FA 78039 ISELIN Nov. 14-17, 1978; and #153 recovered FA 78038 WHITEFOOT Dec. 13, 1978). Surface salinity samples: 10; Surface grab samples: 2; XBT: 10.

Staff: Bradford Butman, William J. Strahle

Affiliate Staff:

Notes: Original Center People field contained: Brad Butman - Ch. Sci.; William Strahle - Elect. Eng.

Location Map:

Platform(s):

photo of Whitefoot
Whitefoot

Publications

Gelfenbaum, G., and Noble, M., 1993, Significant bed elevation changes related to Gulf Stream dynamics on the South Carolina continental shelf: Continental Shelf Research, v. 13 no. 4, doi: 10.1016/0278-4343(93)90057-5.

Noble, M.A., and Gelfenbaum, G.R., 1992, Seasonal fluctuations in sea level on the South Carolina shelf and their relationship to the Gulf Stream: Journal of Geophysical Research - Oceans, v. 97 no. C6, URL: http://europa.agu.org/?view=article&uri=/journals/jc/92JC00811.xml&t=noble.

Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
XBT --- Temperature
Camera- deep sea --- Photo
1978-018-FA-PH-001 ( film collection of TRIPOD 153; 19780713-19781213)
Grab sampler --- Biology
Geology
Bottom tripod --- Mooring (physical oceanography)
1978-018-FA-OM-001 ( SAB mooring data)