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Northeast Pacific CTD Data
Contact: Jane Fleischbein
More information is available in the following data reports (PDF's):1997-1998 Report - Cruises W9707A, W9709B, W9711C, W9801B, W9804A, AR9806, AR9807, W9808A, W9809A, and W9811A.1999-2000 Report - Cruises W9902A, W9904B, W9907A, W9909C, W9911A, W0002A, W0004B, W0007A, and W0009A.2001 Report - Cruises W0101B, W0101C, W0103A, W0103B, W0107A, W0109A, W0110A, and W0111B.2002-2003 Report - Cruises W0202A, W0204A, W0207A, AT7-21, W0212A, W0302A, W0304A, NH0307A, and W0309B.2004 Report - Cruises W0408D and W0409A.
Refer to the data reports above and to the CCS LTOP website.
Parameter names were changed to conform to BCO-DMO convention; BCO-DMO corrected the date and month values for stations 24 and 25 of the W9711C cruise (month and day were reversed). 05/29/12.
The Conductivity, Temperature, Depth (CTD) unit is an integrated instrument package designed to measure the conductivity, temperature, and pressure (depth) of the water column. The instrument is lowered via cable through the water column and permits scientists observe the physical properties in real time via a conducting cable connecting the CTD to a deck unit and computer on the ship. The CTD is often configured with additional optional sensors including fluorometers, transmissometers and/or radiometers. It is often combined with a Rosette of water sampling bottles (e.g. Niskin, GO-FLO) for collecting discrete water samples during the cast. This instrument designation is used when specific make and model are not known.
CTD measurements taken, CTD unit unidentified
Cruise identification (e.g. W0101C = R/V Wecoma cruise 0101C).
Year (4 digits)
Name of station
Bottom depth, in meters.
Latitude; positive = north.
Longitude; positive = east.
Pressure, (depth of sample recording).
Potential temperature; originally named 'POT_T'.
Potential density (sigma-t).
Specific volume anomaly (he difference between the in situ specific volume and the specific volume of seawater at the same pressure). Originally named 'SP_V_AN'.
Dynamic height; originally named 'DYN_HT'. Dynamic height is the integral of the specific volume over pressure. Measured in joules per kilogram.
Fluorometer voltage reading.
Oxygen current in volts. Originally named 'O2C'.
Oxygen temperature. Originally named 'O2T'.
Oxygen concentration (called 'O2_2' in cruises prior to W0007A).
Light transmission. Measured in volts through cruise W0007A; measured in % light transmission after cruise W0007A. Originally named 'TRN'.
Dissolved oxygen measurement from cruises prior to and including W0007A. Cruises after W0007A use 'O2'. Column originally named 'O2S'.
Biological and Chemical Oceanography Data Management Office.
Funded by the U.S. National Science Foundation