CTD Processing Summary CalCOFI 1911OC CTD Final Data
Download 1911OC CTD raw cast files zipped Download 1911OC Final CTD + bottle data

General CTD Notes - data acquisition notes, logistics, processing - see below.
Please note that these regressions are generated from processed CTD vs FINAL bottle data and are considered done. CTD temperatures and salinities may not have changed significantly but oxygen, estimated chlorophyll-a, estimated nitrate may be significantly different than Final data. Questionable or mistrip bottle data have been removed from the correction regressions but may be visible on the CTD.csv plots. For this cruise and future cruises, both primary & secondary sensor profiles vs bottle data will be generated and archived in the downloadable CTD+Bottle data files. These plots are under the "csv-plots\Primary" & "csv-plots\Secondary" subdirectories.
CTD sensor corrections derived by comparing CTD sensor data, 4sec averages prior-to-bottle closure, to bottle samples
Dual T, S, & O2 Primary Sensor Secondary Sensor
Salinity offset (bottle - CTD salinity; > 350m only; Seabird SBE4) 0.0038 0.00554
Oxygen ml/L (dual Seabird SBE43) y = 0.7984x + 0.0473
R² = 0.9995		 y = 1.0140x + 0.0410
R² = 0.9994
Oxygen umol/Kg (dual Seabird SBE43) y =0.7972x + 1.9461
R² = 0.9994		 y = 1.0130x + 1.6532
R² = 0.9994
Single sensors Linear Polynomial
Nitrate - ISUS 4sec ave voltage vs Bottle NO3
(Satlantic ISUS v3 SN111)		 y = 27.7823x - 28.6637
R² = 0.9973		  
Fluorometer - linear & polynomial regressions

y= 8.4271x - 0.2757
R² = 0.8956

y = 11.8891x2+ 5.3895x - 0.1531
R² = 0.8821
  
 		   Secondary CTD O2 Sensor vs Bottle O2
MBARI-ISUS Voltage vs Bottle NO3 Wetlabs ECO/FL Fluorometer Voltage vs Chlorophyll-a
   
 
General notes: These are cast & Final CTD Processing Notes from 1911OC cruise

CalCOFI 1911OC General Cruise & Cast Notes:

CalCOFI 1911OC sailed on RV Oceanus at 0800 PDT 04 November 2019 from SIO Marfacth.  All 75 science stations were completed.Service and support from the ship was excellent.

CTD General Notes and Problems:

CalCOFI used their 24-10L CTD-rosette with a two-pin termination, cable grip, deck unit, monitor, mouse &. SIO-CalCOFI installed their CTD blade PC (Win7), surface PAR; remote depth readout box; and wired/wireless data network. SIO-CalCOFI's Seabird 911+, 24-bottle epoxy-coated rosette with standard bridle was deployed by the Bold Horizon winch system.
Standard sensor configuration: dual T, C, & O2 on separately plumbed & pumped horizontal arrays; Wetlabs ECO-Fl fluorometer; C-Star transmissometer; Biospherical PAR & Surface PAR (mounted on the LTER GP van); MBARI-ISUS v3 w/ battery; SBE18 pH; altimeter. Refer to .hdr files for serial & model numbers or the table below. Primary Oxygen sensor was swapped out after cast 6 due to a high offset value. The PH sensor was also removed on station 12 due to instrument issues.

Setup: Using SIO-CalCOFI's 24-10L bottle CTD-rosette epoxy-coated standard bridle frame.
CTD - SBE 9+ (SN#3161-0936) Sensor Configuration
1° Sensors: freshly calibrated 2° Sensors:
 SBE 3plus temperature sensor (SN#5109);
 Conductivity SBE 4 Sensor (SN#3569)
 Oxygen SBE 43 Sensor (SN#3284)and (SN#0680)
 Pump		  SBE 3plus temperature sensor (SN#5102);
 Conductivity SBE 4 Sensor (SN#2206)
 Oxygen SBE 43 Sensor (SN#1075)
 Pump
Other sensors (unpumped)

Wetlabs ECO/FL Fluorometer SN#3122
Wetlabs C-Star Transmissometer SN#CST-811DR
pH SBE 18 SN#0709
Remote PAR SN#70209

 CCE-LTER MBARI-ISUS v3 SN#111
Altimeter SN#46604
Carousel SBE 32 3217964-0225
Reference PAR SN#20514

Logistics & General System/Sampling Notes:

Cast Notes (transcribed from console ops, clipboard notes, & data processing):