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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

y=7.0294x-0.2322

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
Summary: 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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