1507OC

Cruise Summary

Summary:

1507OC Summer CalCOFI cruise on RV Oceanus; 08 – 25 Jul 2015; 71 stations (62 standard & 8 SCCOOS) successfully occupied. Stations 86.7 110, 83.3 110, 76.7 100.0, & 85.4 35.8 were cancelled to maximize remaining shiptime, reduced by ship equipment failures. No delays or station cancellations were due to bad weather or scientific equipment failures. All PRPOOS tows on lines 90.0 & 80.0 were performed but tows on lines 83.3 & 86.7 were cancelled. ~75hrs of shiptime were lost due to personal emergency and two separate ship equipment failures (refrigeration unit & seal to main generator cooling pump). The cruise was extended one day to help recover time & minimize station loss; originally, the ship was to return 24 Jul.

Cruise Dates:

08 – 25 Jul 2015 (Wed-Sat; 18 DAS)

Loading:

06 – 07 Jul 2015 

Offloading:

27 Jul 2015 

Ship:

RV Oceanus

Contacts:

James Wilkinson, Chief Scientist, IOD SIO-CalCOFI

Amy Hays, SWFSC-NOAA Technical Coordinator

Jennifer Rodgers-Wolgast, SIO-CalCOFI Volunteer Coordinator

Cruise Map:

Station Data Collected:

CTD Sensors:

  • Temperature
  • Conductivity/Salinity
  • Dissolved Oxygen
  • Fluorescence
  • Transmittance
  • PAR (Photosynthetically Active Radiation)
  • Nitrate (ISUS)
  • Altimetry
  • pH

Bottle Samples:

  • Salinity
  • Dissolved Oxygen
  • Nutrients
  • Chlorophyll-a & Phaeopigments
  • Primary Productivity
  • Phytoplankton
  • HPLC (High Performance Liquid Chromatography)
  • DIC (Dissolved Inorganic Carbon)/pH
  • LTER Ancillary
  • Fukushima Cs-134
  • NCOG DNA/RNA

Nets:

  • Bongo
  • Manta
  • Pairovet
  • PRPOOS

Underway Data Collected:

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)

0.0010

0.0039

Oxygen ml/L

y = 1.0528x - 0.0219; R² = 0.9996

y = 1.0381x - 0.0158; R² = 0.9996

Oxygen umol/Kg

y = 1.0547x - 0.8194; R² = 0.9996

y = 1.0399x - 0.5543; R² = 0.9996

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

LINEARPOLYNOMIAL
Nitrate

y= 28.031x - 8.7794;

R² = 0.9906
Fluorescence

y = 7.4981x - 0.2437; R² = 0.7392

y = -0.182x2+7.5075x - 0.2442; R² = 0.7392

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.