1911OC

Cruise Summary

Summary:

CalCOFI 1911OC sailed on RV Oceanus on 04 Nov 2019 at 1000PDT from Nimitz Marine Facility, San Diego. All 75 science stations were successfully occupied. CTD casts and various net tows were completed at each science station. Underway visual observations of marine mammals were conducted while under transit. There was no acoustic component (i.e., no hydrophone array or sonobuoys) to this cruise. Other underway science included continuous pCO2/pH and meteorological measurements. The ship averaged >13 knots. The cruise ended Nimitz Marine Facility, San Diego on 19 Nov 2019 at 0800PDT.

Cruise Dates:

04 – 19 Nov 2019 (Mon-Tues; 16 DAS)

Loading:

02 – 03 Nov 2019

Offloading:

20 Nov 2019

Ship:

RV Oceanus

Contacts:

Dave Faber, Chief Scientist, SIO

Angela Klemmedson, 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)

0.0038

0.00554

Oxygen ml/L

y = 0.7984x + 0.0473 R² = 0.9995

y = 1.0140x + 0.0410 R² = 0.9994

Oxygen umol/Kg

y = 0.7972x + 1.9461 R² = 0.9994

y = 1.0130x + 1.6532 R² = 0.9994

Single Nitrate (Satlantic ISUS v3 SN111) and Fluorescence (Wetlabs ECO AFL/FL) Sensors

LINEARPOLYNOMIAL
Nitrate

y = 27.7823x - 28.6637 R² = 0.9973
Fluorescence

y = 8.4271x - 0.2757 R² = 0.8956

y = 11.8891x2+ 5.3895x - 0.1531 R² = 0.8821

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.