The Astoria Canyon Project May 1983–August 1983

The Astoria Canyon Project was sponsored by the United States Department of Energy Contract DE-AT06-76-EV-71025 to Dr. B. Hickey at the University of Washington. The study of circulation in and around canyons is important to the Washington coast since several canyons are located in this area. Astoria and Quinault Canyon provide the primary conduits by which land derived sediments and pollutants reach the deep ocean.

The University of Washington deployed 7 current meter moorings, AC831 through AC837 in and around Astoria Canyon. Current meters were all Aanderaa (AA) instruments. Speed and direction and temperature were measured by the Aanderaa meters. Data was sampled in 15 minute intervals, then edited for spurious values. Speed and direction were independently filtered with a 5 point binomial filter spanning approximately 1.25 hours then resolved into u and v components.

Abbreviations and units are:
Depth, m, meters,
Speed, spd, cm/sec,
Direction, D, degrees, true north,
u component (eastward), u, v component (northward), v, cm/sec, true North,
Temperature, T, ºC,
Pressure, P, decibars,
Date and time is listed as DATE. Add 8 hours to get GMT, format is mm/dd/yy hh:mm.

Data files consist of ASCII tab delimited files, one per meter. Headers indicate the mooring, the deployment, variable, and depth rounded to the nearest meter. For example AC832u70 indicates the data is from the AC832 mooring, u component at 70m, AC835T134 indicates the data is from the AC835 mooring, temperature data at 134m. The last column, JJ, is zero filled to indicate last data column for that meter.

Mooring: AC831                                  Position: 46º13.38'N, 124º28.42'W
Bottom depth: 146m
Deployed: 0920 (+8) May 17, 1983
Recovered: June 8, 1983. One float from mooring found near Tillamook Head (Cape Meares). June 12, 1983 large net float recovered in the Three Arch area. No instramentation with data was ever recovered.

 

Mooring: AC832                                  Position: 46º13.7'N, 124º29.2'W
Bottom depth: 380m
Deployed: 1415 (+8) May 20, 1983
Recovered: Array was dragged up June 23, 1983 by F/V Lisa Rose. One instrument was lost on recovery. The rest were returned to the UW.

Actual Depth Variables Comments
70
u,v,T
Data record ends June 22.
110
u,v,T
Data record ends June 22.
370
D,T
Rotor may have come off during deployment. No speed data. Direction and Temperature data only. Data record ends June 22.

 

Mooring: AC833                                 Position: 46º14.9'N, 124º29.5'W
Bottom depth: 580m
Deployed: 0924 (+8) May 22, 1983
Recovered: Found floating in 113m of water south west of Astoria Canyon on August 26, 1983 by F/V Pacific Conquest.

Actual Depth Variables Comments
110
u,v,T
 Data record ends Aug. 19.
150
u,v,T
 Data record ends July 16.
210
u,v,T
 Data record ends June 18.
370
u,v,T
 Data record ends July 24.
570
u,v,T
 Data record ends Aug. 19.

 

Mooring: AC834                                 Position: 46º16.01'N, 124º30.41'W
Bottom depth: 450m
Deployed: 1242 (+8) May 21, 1983
Recovered: This mooring was recovered by the submersible Alvin, August 12, 1984. Found in approximately 425m of water. Top float was missing. No information is available as to when the mooring was compromised. Use data with care.

Actual Depth Variables Comments
140
u,v,T
 Data record ends May 30.
180
u,v,T
 Data record ends May 30.
200
u,v,T
 Data record ends May 30.
260
u,v,T
 Data record ends May 22.
420
u.v,T
 Meter had temperature record through Sept. 22, 1983 when tape ran out. Instrument most likely on the bottom after flotation was lost so the full T record was kept. The spd and direction measurements went bad beginning 1855 May 22, 1983, so u,v were zeroed out for the rest of the record.

 

Mooring: AC835                                 Position: 46º16.3'N, 124º30.4'W
Bottom depth: 184m
Deployed: 1525 (+8) May 21, 1983
Recovered: 1716 (+8) Aug. 17, 1983

Actual Depth Variables Comments
94
u,v,T
Data record ended Aug. 17.
134
u,v,T
Data record ended Aug. 12.

 

Mooring: AC836                                 Position: 46º16.2'N, 124º27.1'W
Bottom depth: 404m
Deployed: 1830 (+8) May 19, 1983
Recovered: 0707 (+8) Aug. 19, 1983

Actual Depth Variables Comments
174
u,v,T
Record ends early Aug. 13.
234
u,v,T
Record ends early June 30.
394
u,v,T
Record ends early July 16.

 

Mooring: AC837                                 Position: 46º15.6'N, 124º25.0'W
Bottom depth: 374m
Deployed: 1258 (+8) May 19, 1983
Recovered: Array dragged up by F/V Pacific Queen on August 6 or 7.

Actual Depth Variables Comments
89
u,v,T
Data record ends Aug. 6. Beginning around July 7 temperature record begins to have bad sections.
169
u,v,T
Data record ends Aug. 6.
229
u,v,T
Data record ends June 11.


Last updated Sept. 17, 2013.