Summary for Field Activity Number 77032

Alternate Leg: ID (Leg I, II)

Area of Operations : United States South Atlantic shelf, Mid-Atlantic Bight, Georges Bank, United States, North America, North Atlantic

Dates: September 6, 1977 to September 23, 1977

Chief scientist: William Strahle-Leg I, Brad Butman-LegII
   

Objectives: 1.Recover 5 instrumented bottom tripod packages and deploy 2 tripods as part of a continuing study of currents and sediment transport on the east coast continental shelf. 2.Recover 2 current meter moorings, deploy 3 current meter moorings as part of a continuing study of currents and sediment transport. 2 current moorings were deployed for EG&G. 3.Make underway XBT observations of water temperature and structure, obtain profiles of temperature and conductivity(CTD) along selected transects running across shelf and alongshelf. Measurements were designed to determine position of shelf-slope water front, to aid in interpretation of tripod and current meter data, to map distribution of cold pool water found on the shelf in summer off New Jersey coast and to study mixing through Great South Channel. 4.Recover, replace, and relight as necessary surface marker floats at tripod and current meter locations. Floats serve to mark instrument locations and deter fishing activity.

Type of Activity: Mooring work
physical oceanographic observations

Information to be derived: Time series data

Summary: LegI:Recovered tripods:3(#129,131 both deployed #77023 OCEANUS 029 Jul. 6-13, 1977, #134 deployed #77028 ADVANCE II Aug. 5-7, 1977); XBT:65; Surface salinity samples:64. LegII:Recovered tripods:4(#128,130,132,133 all deployed #77023 OCEANUS 029 Jul. 6-13, 1977); Deployed tripods: 3(#135,136,137,2EG&G current meters all recovered #78001 OCEANUS 038 Jan. 19-26, 1978); XBT:65; CTD:49; Surface salinity samples:110;

USGS Project Number:

Contact: Brad Butman (bbutman@usgs.gov)