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Summary: CalCOFI 1911OC sailed on RV Oceanus at 1000PDT 04 Nov 2019 from Nimitz Marine Facility San Diego. 75 of 75 science stations were completed. CTD casts, secchi disk 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, allowing sufficient time to complete all 75 stations and return to San Diego before schedule on 19 Nov 2019 0800PDT. 
Cruise Dates:  04 - 19 Nov 2019 (Mon-Tue; 16 DAS)
Loading: Loading & Setup 02 - 03 Nov 2019 with departure 04 Nov 2019
Offloading: 20 Nov 2019 (Wed) Nimitz Marine Facility San Diego
Ship: RV Oceanus
Station plan: 75 Stations completed (66 CalCOFI + 9 SCCOOS)
Cruise Map:
   
Contacts: Dave Faber, Chief Scientist, SIO
Angela Klemmedson, Technical Coordinator, SIO
   

CTD Processing Summary CalCOFI 1911OC CTD Final Data
Download 1911OC CTD raw cast files zipped Download 1911OC Final CTD + bottle data

General CTD Notes - data acquisition notes, logistics, processing - see below.
Please note that these regressions are generated from processed CTD vs FINAL bottle data and are considered done. CTD temperatures and salinities may not have changed significantly but oxygen, estimated chlorophyll-a, estimated nitrate may be significantly different than Final data. Questionable or mistrip bottle data have been removed from the correction regressions 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.

CTD sensor corrections derived by comparing CTD sensor data, 4sec averages prior-to-bottle closure, to bottle samples
Dual T, S, & O2 Primary Sensor Secondary Sensor
Salinity offset (bottle - CTD salinity; > 350m only; Seabird SBE4) 0.0038 0.00554
Oxygen ml/L (dual Seabird SBE43) y = 0.7984x + 0.0473
R² = 0.9995
y = 1.0140x + 0.0410
R² = 0.9994
Oxygen umol/Kg (dual Seabird SBE43) y =0.7972x + 1.9461
R² = 0.9994
y = 1.0130x + 1.6532
R² = 0.9994
Single sensors Linear Polynomial
Nitrate - ISUS 4sec ave voltage vs Bottle NO3
(Satlantic ISUS v3 SN111)
y = 27.7823x - 28.6637
R² = 0.9973
 
Fluorometer - linear & polynomial regressions

y= 8.4271x - 0.2757
R² = 0.8956

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

  
 
  Secondary CTD O2 Sensor vs Bottle O2
MBARI-ISUS Voltage vs Bottle NO3 Wetlabs ECO/FL Fluorometer Voltage vs Chlorophyll-a
   
 

Please note that the anomalies are based on 50-year harmonics (1949-1999) and these data are 1m binavg Seasoft-processed CTD data that have not gone through thorough quality control checks or bottle corrections. They are presented to give a general impression of current conditions. Final data plots will be published after all data are processed.

10 & 100 meter Preliminary CTD Data & Anomaly (50yr mean) Contours (Click for larger image)
200 meters (Click for larger image)
300 meter (Click for larger image)

 

Announcement: CalCOFI 1911OC Cruise Instructions
Cruise Dates: 04-19 Nov 2019 (Mon-Tue; 16 DAS) 
Loading: 02-03 Nov 2019 (Sat-Sun) Nimitz Marine Facility San Diego with departure 04 Nov 2019 0800
Offloading: 20 Nov 2019 (Wed) Nimitz Marine Facility San Diego
Participant Forms:  
Ship: RV Oceanus
Station plan: 75 Stations (~66 CalCOFI + 9 SCCOOS); 
Cruise Map:
   
Contacts: This email address is being protected from spambots. You need JavaScript enabled to view it., Chief Scientist, SIO
  This email address is being protected from spambots. You need JavaScript enabled to view it., Technical Coordinator, SIO
   

 

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