| Identifier | I490AT | ||||||||
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| Alternate names | I-4-90-AT,AMASSEDS_CRUISE_II | ||||||||
| Purpose | To measure the physical, chemical and geological properties in the water column and seabed within the Amazon zone, that region extending from the mouth of the river across the shelf where there are strong gradients in salinity. | ||||||||
| Description | Woods Hole Oceanographic Institution,University of Washington,United States Geological Survey, Menlo Park, California,North Carolina State University,Louisiana Universities Marine Consortium,Bedford Institute of Oceanography. Chief Scientists: Rocky Geyer, John Maddock. Geological data (CTDmeter, underwatercamera, boxcore, ADP, Geoprobe, turbiditymeter, currentmeter) of field activity I-4-90-AT in Amazon Shelf from 03/09/1990 to 03/21/1990 | ||||||||
| Location | Amazon Shelf | ||||||||
| Summary | Between the mouth of the Para River and anchor station 1, 5 CTD stations were occupied. Anchor station 1 was occupied between 1800 on 10 March and 1215 on 11 March. CTD casts were obtained once per hour, accompanied by 10 liter water samples at various depths. These samples were filtered for suspended solids and analyzed for chemical species. A plankton camera was attached to the CTD to take pictures ofthe flocculants within the water column. Hourly profiles were obtained with the Gafanhoto profiler. 8 box cores were obtained during the anchor station. A 600 kHz acoustic Doppler current profiler was operated continuously during the anchor stations and throughout the cruise, providing a continous record of that currents as a function of depth under the ship. During a portion of the anchor station a S4 electromagnetic current meter was deployed to measure currents, temperature and salinity. 9 CTD casts were conducted between anchor station 1 and the site of GEOPROBE. Attempts to recover GEOPROBE were abandoned because of rough weather. Anchor station 2 was occupied between 1700 on 12 March and 1900 on 13 March during which hourly CTD and gafanhoto casts were performed. Continous profiles with the S4 current meter were also performed. 2 box cores were also taken at the end of the station. After anchor station 2, the ship transited to mooring site M-2 to verify the moored equipment was intact then returned to site of GEOPROBE to attempt recovery. The recovery attempt was unsuccessful. Anchor statin 3 offshore of Rio Cunani was conducted between 0143 on 15 March to 0315 on 16 March. Anchor station 4, also offshore of Rio Cunani was occupied on 18 March at 1800 until 19 March at 1300. During this anchor station coastal sampling was conducted by UFPA and US scientists. The same set of measurements were made at stations 3 and 4 as at station 2. 7 CTD cast were obtained enroute to anchor station 5. Anchor station 5 was occupied at 1100 on 18 March to 1300 on 19 March. Same measurments were taken as at other anchor stations. A survey including 24 CTD casts extended from anchor station 5 to the 60 m isobath to anchor station 6. Anchor station 6 was performed at the river mouth, 12 m water depth, with same measurements taken as other anchor stations plus the addition of 6 box cores. Anchor station 7 reoccupied the site of anchor station 1. Between 0700 and 1930 on 21 March profile measurments and 6 box cores were obtained. | ||||||||
| Info derived | CTD casts for suspended solids and analyzed for chemical species, pictures of flocculants within the water column, hourly profiles, samples, currents as a function of depth, temperature, salinity. | ||||||||
| Comments | Staff information imported from InfoBank Rocky Geyer (WHOI) - Chief Scientist John Maddock (chief Scientist) - Co Brent McKee (Lumcon) - Scientist Kim McCoy - Technician Craig Marquette (WHOI) - Technician Chris Sherwood - Student Ellen Petticrew - Technician Tim Milligan (Bedford Institute of Oceanography) - Technician Pete Swarzenski (Lumcon) - Student Greg Booth - Student Tom Pacioni - Student Steve Harden (North Carolina State University) - Student Gail Kineke (University Of Washington) - Student George Tate (USGS) - Student Mead Allison - Student Alfredo Bernedo - Scientist Paulo Cavalante - Student Julio Faleiro - Student Jose Neto - Student Sven Muller - Student Cleise Cordeiro - Student Sergio Oliveira - Student Carlos Correa - Technician Marcelo Viana - Student Marcelo Travassos - Student | ||||||||
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| Activity | Geological |
| Organization |
Woods Hole Oceanographic Institution(WHOI)
Woods Hole, MA02543
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| Organization |
University of Washington
Seattle, WA
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| Organization |
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
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North Carolina State University
Raliegh, NC
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| Organization |
Louisiana Universities Marine Consortium(LUMCOM)
Chauvin, LA
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| Organization | Bedford Institute of Oceanography |
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| Crew members |
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| Affiliate principal | Rocky Geyer (WHOI), John Maddock | ||||||||||||||||||
| Affiliate staff | John Maddock (chief Scientist) - Co,Brent McKee (Lumcon) - Scientist,Kim McCoy - Technician,Craig Marquette (WHOI) - Technician,Ellen Petticrew - Technician,Tim Milligan (Bedford Institute of Oceanography) - Technician,Pete Swarzenski (Lumcon) - Student,Tom Pacioni - Student,Steve Harden (North Carolina State University) - Student,Julio Faleiro - Student,Jose Neto - Student,Sven Muller - Student,Sergio Oliveira - Student,Marcelo Viana - Student,Marcelo Travassos - Student |
| Data category: | Environmental Data, Imagery, Sampling, Time Series |
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| Data type: | CTD, Photo, Biology, Geology, Current, Mooring (physical oceanography), Turbidity |
| Equipment | Usage description | Data types | Datasets |
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| CTD | Surveys (geochemical), Experiments (geochemical), CTD | (no data reported) | |
| underwatercamera | Photo | (no data reported) | |
| boxcore | Biology, Geology | (no data reported) | |
| ADP | Current | (no data reported) | |
| Geoprobe | Mooring (physical oceanography) | (no data reported) | |
| turbiditymeter | Turbidity | (no data reported) | |
| currentmeter | Current | (no data reported) |
