USGS Woods Hole, MA Field Activity Report for 78031

Alternate number:

103

Platform:

ATLANTIS II

Submersible:

Owner-Operator:

WHOI, Woods Hole, MA

Captain:

David Cassiles-Master, WHOI

Center Principal:

Brad Butman

Affiliate Principal
(if any):

Area of Operations:

Mid-Atantic Shelf, Wilmington Canyon, Mud Patch, Great South Channel, United States, North America, North Atlantic

Bounding Coordinates

North:

41.75

South:

38.25

West:

-74.25

East:

-66

Start and End Dates:

September 28, 1978 to October 5, 1978

Start and End Ports:

from Woods Hole, MA to Woods Hole, MA

Days at Sea:

Project Number:

Project Title:

Cruise Funding Source:

Contract:

Type of Activity:

Mooring work

Objectives:

Deploy 5 tripod systems, 6 current moorings; Recover 2 tripods and 2 current moorings. Monitor near-bottom circulation along the southern flank of Georges Bank, through Great South Channel, investigate coherence of flow between Georges Bank and mid-Atlantic shelf. Study currents and sediment movement in region of fine-grained sediments south of Martha s Vineyard.2.Conduct temperature, salinity/suspended matter observations along shelf sections to determine position of moorings relative to coastal water masses to aid data interpretation.3.Sidescan-sonar survey to determine large-scale bedform distribution and direction of movement.4.Recover, relight, and replace necessary surface marker floats at tripod and current locations (so fishermen can avoid fouling their nets and leave instrumentation undisturbed.)

Information to be derived:

Times series data

Data Types (and Media) Produced:

Scientific Party
(USGS):

Brad Butman-Chi Sci; Cynthia Bryden, Charles Deadmon, Neal Lillard-Corpus, Marlene Noble, Carol Parmenter, Stephanie Pfirman, B. Reckert-Washington, William Strahle, David Twichell, John West-Corpus;

Scientific Party
(affiliate):

J. Ratcliff-Benthos;; Andrew Eliason-Eliason Data Services;; T. Sackton-Observer-Fair Share;; T. Dourdeville-WHOI,

Data Curator:

Scientific Equipment:

Mooring gear
XBT
CTD
Surface grab sampler
Sidescan sonar system

Navigation techniques used:

Loran-C (Northstar 6000)

Summary of Results:

Recovered tripods:2(#148,149 deployed #78010 OCEANUS 045 May 10-18, 1978); Recovered current mooring:2(#150,151 deployed #78010 OCEANUS 045 May 10-18, 1978); Deployed tripod:5(#155,156 both recovered #79002 OCEANUS 056 Mar 6-15, 1979; #157 recovered #78035 WHITEFOOT Oct 30-Nov 2, 1978; #158,159 both recovered #79002 OCEANUS 056 Mar 6-15, 1979); Deployed current mooring:6(#160 recovered #79002 OCEANUS 056 Mar 6-15, 1979; #161 incomplete recovery information; #162 partial recovery by fisherman OCEAN STATE Oct 16, 1978; #163 recovered #79002 OCEANUS 056 Mar 6-15, 1979; #164 recovered Jan 30, 1979 no ship and cruise information; #165 recovered #79002 OCEANUS 056 Mar 6-15, 1979); XBT s:61; CTD/Transmission:33; Surface salinity:91; Surface grab samples:7 (#4727-4733); Sidescan sonar:18km

Number of Stations Occupied:

Station Description:

Number of Submersible Dives:

Continuous Data (in Km):

Seismic Line Descriptions:

Track Plot:

Related Web Sites:

Remarks:

Contact:

Brad Butman (bbutman@usgs.gov)

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