1907BH

Cruise Summary

Summary:

CalCOFI 1907BH sailed on RV Bold Horizon on 11 Jul 2019 at 0800PDT from 10th Ave Marine Terminal, San Diego. 70 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, coupled with sonobuoy deployments at each station to record marine mammal acoustics. Other underway science included continuous pCO2/pH and meteorological measurements. Approximately 12 hours were lost early in the cruise due to satellite communications malfunction. The ship diverted from the standard CalCOFI cruise track after 93.3 45.0 north to San Clemente Island for satellite repairs and resumed work at 93.3 50.0. The cruise ended 10th Ave Marine Terminal, San Diego on 26 Jul 2019.

Cruise Dates:

11 – 26 Jul 2019 (Thu-Fri; 16 DAS)

Loading:

08 – 10 Jul 2019

Offloading:

29 Jul 2019

Ship:

RV Bold Horizon

Contacts:

Dan Schuller, Chief Scientist, 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)

-0.0033

-0.0061

Oxygen ml/L

y = 1.0223x - 0.0043; R² = 0.9997

y = 1.0334x + 0.0523; R² = 0.9997

Oxygen umol/Kg

y = 1.0213x + 0.1182; R² = 0.9999

y = 1.0319x + 2.4074; R² = 0.9998

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

LINEARPOLYNOMIAL
Nitrate

y = 27.2958x - 27.8866; R² = 0.9929
Fluorescence

y = 11.0834x - 0.4148; R² = 0.8742

y = 8.9265x2+ 6.5138x - 0.1721; R² = 0.8943

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.