1904RL
Cruise Summary
Summary:
CalCOFI 1904RL sailed on FSV Reuben Lasker on 02 Apr 2019 at 1230PDT from 10th Ave Marine Terminal, San Diego. 67 of 75 science stations were successfully occupied. CTD casts and various net tows were completed at each science station. Underway visual observations of marine mammals and avifauna were conducted while under transit. Other underway science included continuous pCO2/pH and meteorological measurements. The cruise ended Nimitz Marine Facility, San Diego on 19 Nov 2019 at 0800PDT.
Cruise Dates:
02 – 18 Apr 2019 (Tue-Thu; 17 DAS)
Loading:
27 Mar & 1 Apr 2019
Offloading:
19 Apr 2019
Ship:
Contacts:
Bryan Overcash, Chief Scientist, NOAA
Dan Schuller, Technical Coordinator, SIO
Cruise Map:
Station Data Collected:
CTD Sensors:
- Temperature
- Conductivity/Salinity
- Dissolved Oxygen
- Fluorescence
- Transmittance
- PAR (Photosynthetically Active Radiation)
- Nitrate (ISUS)
- Altimetry
Bottle Samples:
- Salinity
- Dissolved Oxygen
- Nutrients
- Chlorophyll-a & Phaeopigments
- Primary Productivity
- Phytoplankton
- HPLC (High Performance Liquid Chromatography)
- DIC (Dissolved Inorganic Carbon)
- DNA/RNA
Nets:
- Bongo
- Manta
- Pairovet
- PRPOOS
Underway Data Collected:
- Surface & Meteorological Measurements
- Marine Mammal Visual & Acoustic Observations
- Seabird Visual Observations
- CUFES (Continuous Underway Fish Egg Sampler)
- ADCP (Acoustic Doppler Current Profiler)
- pCO2 (partial pressure of carbon dioxide)
- ALF (Advanced Laser Fluorometer)
- Fisheries Acoustic Observations (EK60)
Preliminary Plots
Please note: these data are 1m-bin-average Seasoft-processed CTD data that have not gone through quality control checks or bottle corrections. Anomalies are based on 50-year harmonics (1949-1999).
10 meter Preliminary CTD Data Contours
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10 meter Anomaly Contours (50 yr mean)
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100 meter Preliminary CTD Data Contours
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100 meter Anomaly Contours (50 yr mean)
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200 meter Preliminary CTD Data Contours
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200 meter Anomaly Contours (50 yr mean)
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300 meter Preliminary CTD Data Contours
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300 meter Anomaly Contours (50 yr mean)
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CTD Processing Notes
CTD Sensor Corrections:
Derived by comparing sensor data (4 sec avg prior-to-bottle closure) to bottle samples.
Dual Salinity (Seabird SBE4) and Oxygen (Seabird SBE43) Sensors
| PRIMARY SENSOR | SECONDARY SENSOR | |
|---|---|---|
| Salinity offset (bottle - sensor; > 350 m) | -0.00218 | 0.002378 |
| Oxygen ml/L | y = 1.0277x + 0.0137; R² = 0.9996 | y = 1.0536x + 0.0423; R² = 0.9996 |
| Oxygen umol/Kg | y = 1.0286x + 0.6031; R² = 0.9997 | y = 1.0543x + 1.8765; R² = 0.9997 |
Single Nitrate (Satlantic ISUS v3 SN111) and Fluorescence (Wetlabs ECO AFL/FL) Sensors
| LINEAR | POLYNOMIAL | |
|---|---|---|
| Nitrate | y = 28.145x - 21.053; R² = 0.9956 | |
| Fluorescence | y = 13.85x - 0.5885; R² = 0.8241 | y = 19.225x2+ 4.5721x - 0.1043; R² = 0.908 |
Regressions:
Please note: these regressions are generated from preliminary CTD vs bottle data and will be reprocessed once final bottle data are available. CTD temperatures and salinities do not usually change but oxygen, chlorophyll-a, and nitrate may change significantly after QAQC. 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.
