1802SH

Cruise Summary

Summary:

CalCOFI 1802SH sailed on NOAA Ship Bell M. Shimada on 01 Feb 2018 from 10th Avenue Marine Terminal, San Diego. With only eleven days-at-sea, 40 stations were scheduled. With mostly calm weather and fast transit times, 5 additional stations on Line 77 were added. Forty-five stations were completed before transiting north & offloading in San Francisco.

Cruise Dates:

01 – 11 Feb 2018 (Thu-Sun; 11 DAS)

Loading:

29 – 31 Jan 2018

Offloading:

12 Feb 2018

Ship:

NOAA FSV Bell M. Shimada

Contacts:

Bryan Overcash, Chief Scientist, NOAA

Dave Wolgast, 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)

0.0020

-0.0001

Oxygen ml/L

y = 1.0731x + 0.0003; R² = 0.9999

y = 1.0452x + 0.0061; R² = 0.9996

Oxygen umol/Kg

y = 1.0749x + 0.1044; R² = 0.9999

y = 1.0469x + 0.3613; R² = 0.9996

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

LINEARPOLYNOMIAL
Nitrate

y = 27.665x - 6.1033; R² = 0.9905
Fluorescence

y = 10.582x - 0.418; R² = 0.7945

y = 16.582x2 + 4.9389x - 0.1495; R² = 0.8357

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.