Shelf Observations near the Columbia River Mouth
June 1967–October 1969

The Shelf Observations near the Columbia River Mouth project 1967–1969 was sponsored by the United States Atomic Energy Commission Contract AT(45-1)-1725 to Dr. C. Barnes at the University of Washington. The purpose of this study was to directly measure the current directions and magnitudes on the continental shelf off the coast of Washington. Project information and recovery notes are from T.S. Hopkins, 1971, Velocity, Temperature, and Pressure Observations from Moored Meters on the Shelf Near the Columbia River Mouth, 1967–1969, University of Washington, Department of Oceanography, Special Report 45.

The University of Washington recovered 8 current meters, B,C,N,O,S,V,Z,AA deployed on the continental shelf off the Washington coast. Current meters used were Braincon (BR) instruments measuring speed and direction. Data was sampled in 20 minute intervals, then edited for spurious values. Smoothing was done on the components of the velocity vector, using a 9 point binomial filter.

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, º C,
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. Headers indicate the mooring, the deployment, variable, and depth rounded to the nearest meter. For example B67u79 indicates the data is from the B 1967 meter, u component at 79m. The last column, JJ, is zero filled to indicate last data column for that meter.

Meter: B                                   Position: 46º23.5'N, 124º22.0'W
Bottom depth: 82m
Deployed: 1435 (+8) August 31, 1967
Recovered: Fisherman caught current meter in bottom trawl, and subsequently abandoned it at the Union Oil dock in Astoria. Custody was recovered through action of the Clatsop Community College, Astoria, Oregon.

Actual Depth Variables Instrument Type, Comments
79
u,v
 BR

Meter: C                                  Position: 46º23.6'N, 124º14.1'W
Bottom depth: 50m
Deployed: 1100 (+8) Nov. 21, 1967
Recovered: This instrument was recovered from a fisherman in Grayland, Washington, in May 1968. He had picked up the submerged float and current meter off Westport after another fisherman had caught it in his gear and subsequently thrown it back to sea.

Actual Depth Variables Instrument Type, Comments
47
u,v
BR

Meter: N                                  Position: 46º25.0'N, 124º20.0'W
Bottom depth: 80m
Deployed: 1500 (+8) Sept. 23, 1968
Recovered: Dec. 10, 1968

Actual Depth Variables Instrument Type, Comments
60
u,v
 BR

Meter: O                                   Position: 46º24.8'N, 124º20'W
Bottom depth: 80m
Deployed: 1140 (+8) Dec. 19, 1968
Recovered: Feb. 19, 1969

Actual Depth Variables Instrument Type, Comments
77
u,v
 BR

Meter: S, V                              Position: 46º24.8'N, 124º20'W
Bottom depth: 80m
Deployed: 1313 (+8) May 25, 1969
Recovered: July 16, 1969

Actual Depth Variables Instrument Type, Comments
49
u,v
BR
77
u,v
BR

Meter: AA, Z                            Position: 46º24.8'N, 124º20'W
Bottom depth: 80m
Deployed: 1402 (+8) August 21, 1969
Recovered: October 22, 1969

Actual Depth Variables Instrument Type, Comments
19
u,v
BR
50
u,v
BR


Last updated July 24, 2013.