The Astoria Canyon Project 1978

The Astoria Canyon 1978 Project was sponsored by the United States Department of Energy Contract EY-76-S-06-2225 TA25 to Drs. B. Hickey & J. Dungan Smith 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 maintained 8 current meter moorings, AC781 through AC788 in and around Astoria Canyon. Current meters were a mix of Aanderaa (AA) and Braincon (BR) instruments. The Braincon instruments were used as backup only and no data was archived. Speed and direction and temperature were measured by the Aanderaa meters. Data was sampled in 20 minute intervals, then edited for spurious values. Speed and direction were independently filtered with a 5 point binomial filter spanning approximately 1.5 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 AC782u60 indicates the data is from the AC782 mooring, u component at 60m, AC788T100 indicates the data is from the AC788 mooring, temperature data at 100m. The last column, JJ, is zero filled to indicate last data column for that meter.

Mooring: AC781                                   Position: 46º07.9'N, 124º32.0'W
Bottom depth: 140m
Deployed: 1520 (+8) Jan. 14, 1978
Recovered: Released 1646 (+8) April 25, 1978 with no response. Array found floating intact April 29 at 45º54.6'N, 124º08.5'W

Actual Depth Variables Instrument type, Comments
60
u,v,T
 AA

 

Mooring: AC782                                  Position: 46º20.7'N, 124º33.5'W
Bottom depth: 140m
Deployed: 1222 (+8) Jan. 15, 1978
Recovered: Released April 25, 1978 but no response. Steel float and meter found drifting by fisherman April 8, 1978.

Actual Depth Variables Instrument type and Comments
60
u,v,T
 AA

 

Mooring: AC783                                  Position: 46º16.8'N, 124º19.6'W
Bottom depth: 110m
Deployed: 1452 (+8) Jan. 15, 1978
Recovered: 1500 (+8) April 25, 1978

Actual Depth Variables Instrument type and Comments
60
u,v,T
 AA

 

Mooring: AC784                                  Position: 46º13.9'N, 124º34.4'W
Bottom depth: 732m
Deployed: 1017 (+8) Feb. 25, 1978
Recovered: 1150 (+8) April 25, 1978

Actual Depth Variables Instrument type and Comments
60
u,v,T
 AA

 

Mooring: AC785                                  Position: 46º14.0'N, 124º23.4'W
Bottom depth: 140m
Deployed: 1228 (+8) Feb. 25, 1978
Recovered: 1400 (+8) April 25, 1978

Actual Depth Variables Instrument type and Comments
60
u,v,T
 AA

 

Mooring: AC786                                  Position: 46º18.5'N, 124º27.5'W
Bottom depth: 140m
Deployed: 1358 (+8) Feb. 25, 1978
Recovered: Released April 25, not found during ecovery operations.

Actual Depth Variables Instrument type and Comments
60
u,v,T
 AA, Subsurface net float recovered by fisherman near Pt. Grenville May 22, 1978. Current meter found on beach near Cascade Head approximately June 10, 1978. Battery failed. Short record.

 

Mooring: AC787                                  Position: 46º16.3'N, 124º32.2'W
Bottom depth: 140m
Deployed: 0857 (+8) Feb. 25, 1978
Recovered: 1100 (+8) April 25, 1978

Actual Depth Variables Instrument type and Comments
60
u,v,T
 AA

 

Mooring: AC788                                  Position: 46º13.3'N, 124º23.4'W
Bottom depth: 140m
Deployed: 1033 (+8) Oct. 28, 1978
Recovered: 0740 (+8) Dec. 13, 1978

Actual Depth Variables Instrument type and Comments
40
u,v,T
 AA, After approximately 4 days no useful data.
100
u,v,T
 AA, After approximately 3 weeks no useful data.
125
u,v,T
 AA


Last updated Sept. 17, 2013.