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CTD Processing Summary CalCOFI 1301SH CTD Data FinalQC (2017 reprocessing, adding QC columns)
Download 1301SH CTD raw cast files zipped Download 1301SH FinalQC CTD + bottle data
General CTD Notes - data acquisition notes, logistics, processing - see below
CTD sensor corrections derived by comparing 4 secs of CTD sensor data (prior to bottle closure) to bottle samples
Dual T, S, & O2 Primary Sensor Secondary Sensor
Salinity offset (bottle - CTD salinity; > 350m only; Seabird SBE4) -0.0078 -0.00627
Oxygen ml/L (dual Seabird SBE43) y = 1.0363x - 0.0383
R² = 0.9994
y = 1.0334x - 0.033
R² = 0.9994
Oxygen umoles/Kg (dual Seabird SBE43) y = 1.0368x - 1.6624
R² = 0.9994
y = 1.0339x - 1.4348
R² = 0.9994
Single sensors Linear Polynomial
Nitrate - ISUS 4sec ave voltage vs Bottle Nitrate (Satlantic MBARI-ISUS v2) y = 28.196x - 8.825
R² = 0.9834
 
Fluorometer - linear & polynomial regressions

y = 5.72x - 0.1329

R² = 0.6927

y = 1.6023x2+4.8558x-0.0829

R² = 0.6974

  
 
  Secondary CTD O2 Sensor vs Bottle O2
MBARI-ISUS Voltage vs Bottle NO3 Wetlabs ECO/FL Fluorometer Voltage vs Chlorophyll-a
 
General notes: This is the final CTD Processing Summary from 1301SH cruise

CalCOFI 1301SH occupied 90 stations from line 93.3 to 66.7 (San Diego to Monterey CA). Sixty-six standard CalCOFI stations (ie occupied quarterly) and 6 SCCOOS stations along with 18 central coast stations were sampled by the CTD-rosette. Net tows were performed on all stations. CUFES underway egg sampling, SCS meterological and sea surface temperature/salinity/fluorometric data were collected during most transits. The SCS seawater pump system was secured during rough conditions to protect the pump.

CTD configuration was standard: Seabird 911+ with dual T, C, O2, & pumps;  Wetlabs C-Star 25cm transmissometer; Biospherical QSP200L PAR;  Datasonics/Benthos Altimeter; NEW ADDITION is a brand new WET Labs ECO-AFL/FL,  replacing our Seapoint Fluorometer. Sensitivity setting was 0-50mg/m^3; Seabird  pH; Satlantic ISUS v2 & battery. Please refer to the xmlcon files or cruise  prospectus for additional info.

CTD cast notes:
Station 001 - 072 were 515m (depth-permitting), 20-24 bottle rosette CTD casts.
•    Sensor data collected: dual temperature, dual conductivity (dual salinity), dual oxygen, fluorescence, transmissometer, remote PAR, altimeter, ISUS nitrate sensor, & pH. Altimeter note: on stations 061 - 070 the altimeter (voltage 2) was replaced by Shimada's Wetlabs EcoFLNTU fluorometer for diagnostic deployments vs our Seapoint Fluorometer. Data from this sensor may be good on stations 061-062 but does not look good on stas 063-070.
•    Seawater samples taken:oxygen, salinity, nutrients, chlorophylls, LTER ancillary samples, DIC, & daily primary productivity incubation samples.
Stations 073 - 083 were 515 (depth-permitting), 12 bottle rosette CTD casts.
•    Sensor data collected unchanged: dual temperature, dual conductivity (dual salinity), dual oxygen, fluorescence, transmissometer, remote PAR, altimeter (on stations shallower than 515), ISUS nitrate sensor, & pH.
•    Seawater samples taken: 12 oxygen, 2 salinities, 9 chlorophylls.
Stations 084 - 090 (line 67 off Monterey) were 1000m (depth-permitting)
•    Sensor data collected unchanged: dual temperature, dual conductivity (dual salinity), dual oxygen, fluorescence, transmissometer, remote PAR, altimeter, ISUS nitrate sensor, & pH.
•    Seawater samples taken: 12 oxygen, 2 salinities, 9 chlorophylls; plus 7 (24hr) primary productivity experiments performed by MBARI.

Station 007: the primary salinities during the upcast between 455-438m look bad, QC codes are "9" for those depths; use the 2nd salinities.

2017 reprocessing added data-quality code columns and data codes on bad or missing data ("9") or questionable data ("8"). Data values should not have changed from the previously published final CTD data. But the column number on updated CTD.csvs has changed from 65 to 82. Refer to the CTD.csv data format webpage: 65-column index; 82-column index

 
 
 
 
 
 
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