CTD Processing Summary CalCOFI 1701RL CTD Final Data
Download 1701RL CTD raw cast files zipped Download 1701RL FinalQC CTD + bottle data 

General CTD Notes - data acquisition notes, logistics, processing - see below.
Please note that these regressions are generated from Final CTD vs bottle data and have gone through SIO-CalCOFI's strict data processing and point-checking protocol. CTD temperatures and salinities may not have changed from preliminary data but oxygen, estimated chlorophyll-a, estimated nitrate may change significantly after point-checking. Questionable or mistrip bottle data are removed from these comparisons 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 average prior to bottle closure, to bottle samples
Dual T, S, & O2 Primary Sensor Secondary Sensor
Salinity offset (bottle - CTD salinity; > 350m only; Seabird SBE4) -0.0004 -0.0034
Oxygen ml/L (dual Seabird SBE43; 2° O2 Calib Off) y = 1.0103x+0.0092
R² = 0.9996
y = 1.0562x - 0.0003
R² = 0.9996
Oxygen umol/Kg (dual Seabird SBE43; 2° O2 Calib Off) y =0.0108x+0.8621
R² = 0.9996
y = 1.0562x - 0.0003
R² = 0.9996
Single sensors Linear Polynomial
Nitrate - ISUS 4sec ave voltage vs Bottle NO3 (Frank's Satlantic ISUS v3)
Cast 001 - 020 (pre-calibration)
y = 36.489x - 1.3351
R² = 0.9466

y = -18.449x2 + 57.489x - 2.2373

R² = 0.9626

Nitrate - ISUS 4sec ave voltage vs bottle NO3; Cast 021 - 083 (post-calibration) y = 27.903x - 4.3872
R² = 0.987
Fluorometer - linear & polynomial regressions


R² = 0.8105

y = 6.7661x2 + 5.5486x - 0.1745

R² = 0.8128

  Secondary CTD O2 Sensor vs Bottle O2
MBARI-ISUS Voltage vs Bottle NO3 MBARI-ISUS Voltage vs Bottle NO3
Wetlabs ECO/FL Fluorometer Voltage vs Chlorophyll-a    


Project: CalCOFI 1701RL, Winter CalCOFI on NOAA RV Reuben Lasker

CalCOFI 1701RL sailed from 10th Ave Marine Terminal, San Diego Jan 05 2017 at 1300PST.
The cruise was split into two legs due to severe weather off California Jan 20-24.

  • Leg I Jan 05 - 20: RV Reuben Lasker completed 75 stations successfully before returning to San Diego ~1730PST Jan 20.
  • Leg II 25 - 29 Jan: RV Reuben Lasker departed 10th Ave Marine Terminal at 0900PST 25 Jan and transited N to survey Lines 73, 70, 67, & 63. Remaining shiptime limited RV Reuben Lasker to 8 coastal stations & transects on these lines. CUFES surveying for eggs and performing two CTD profile-only casts per line (no seawater samples).
Data files/links: 1701RL Raw CTD Cast Files; 1701RL FinalQC CTD+Bottle Data Files; Prelim. Horizontal Contour Plots
Instructions: CalCOFI 1701RL Cruise Instructions
Cruise Dates: Thursday, 05 Jan 2017 - Sunday, 29 Jan 2017
Loading: Early pre-holiday break loading: 19 - 21 Dec 2016
Tuesday, 04 Jan 2017 - Wednesday, 05 Jan 2017 morning; 10th Ave Marine Terminal, San Diego, CA
Offloading: 30 Jan 2017; 10th Ave Marine Terminal, San Diego, CA
Partiicpant Forms: NOAA Medical Forms - required for all cruise participants sailing Jan 05 2017
Ship: RV Reuben Lasker
Station plan: 104 Stations (95 CalCOFI + 9 SCCOOS) were scheduled and 83 (74 CalCOFI + 9 SCCOOS) were successfully occupied due to severe weather Jan 20-24. Green transit is Leg I returning to San Diego; Blue transits are Leg II N & S transits. Red stations were CUFES surveyed only during the transit south.
Cruise Map:
Contacts: Amy Hays, Chief Scientist, NMFS
  Dave Wolgast, IOD (SIO Technical Coordinator)

Please note that the anomalies are based on 50-year harmonics (1949-1999) and these data are 1m binavg Seasoft-processed CTD data that have not gone through thorough quality control checks or bottle corrections. They are presented to give a general impression of current conditions. Final data plots will be published after all data are processed.

10 & 100 meter Preliminary CTD Data & Anomaly (50yr mean) Contours (Click for larger image)
200 meters (Click for larger image)
300 meter (Click for larger image)


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