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CTD Processing Summary CalCOFI 1307NH CTD Data Final
Download 1307NH CTD raw cast files zipped Download 1307NH FinalQC CTD + bottle data
General CTD Notes - data acquisition notes, logistics, processing - see below
CTD sensor corrections derived by comparing 4 secs of CTD sensor data (prior to bottle closure) to bottle samples
Dual T, S, & O2 Primary Sensor Secondary Sensor
Salinity offset (bottle - CTD salinity; > 350m only; Seabird SBE4) -0.00214 -0.00226
Oxygen ml/L (dual Seabird SBE43) y = 1.0484x - 0.0219
R² = 0.9992
y = 1.0496x - 0.0243
R² = 0.9994
Oxygen umoles/Kg (dual Seabird SBE43) y = 1.0496x - 1.0905
R² = 0.9991
y = 1.0508x - 1.1991
R² = 0.9995
Single sensors Linear Polynomial
Nitrate - ISUS 4sec ave voltage vs Bottle Nitrate (Satlantic MBARI-ISUS v2) y = 28.979x - 9.0078
R² = 0.9853
 
Fluorometer - linear & polynomial regressions

 

y = 1.7338x2+3.5758x-0.0172

R² = 0.698

  
 
  Secondary CTD O2 Sensor vs Bottle O2
MBARI-ISUS Voltage vs Bottle NO3 Wetlabs ECO/FL Fluorometer Voltage vs Chlorophyll-a
 
General notes: This is the final CTD Processing Summary from 1307NH cruise
CalCOFI 1307NH: 74 stations occupied, 66 standard & 8 SCCOOS (80.0 50.5 dropped due to weather); station order was impacted by Naval Operations. 
CTD configuration was standard: Seabird 911+ with dual T, C, O2, & pumps; Wetlabs C-Star 25cm transmissometer; Biospherical QSP200L PAR; Datasonics/Benthos Altimeter; NEW ADDITION is a brand new WET Labs ECO-AFL/FL, replacing our Seapoint Fluorometer. Sensitivity setting was 0-50mg/m^3; Seabird pH; Satlantic ISUS v2 & battery. Please refer to the xmlcon files or cruise  prospectus for additional info.
This cruise had many non-confirmation problems - bottles being closed but no confirmation returning. It was later discovered faulty conductive wire(s) were to blame after the questionable wires were excluded on only a single conductor and shield ground used.
 
Cast 001 93.3 26.7: CTD started down but archiving was not initiated so it was brought back to surface, data acquistion started then lowered

Cast 002 93.4 26.4: No trip at #3, tripped 2 at 5m. Omit #4, re-numbered #5 to surface bottle.

Cast 007 93 40- Bottle 11 didn’t confirm, fired again and the next bottle to be fired advanced by 2 numbers. 2 bottles were tripped at 100m.

Cast 008 93.3 45.0- 270m #5, non confirm_ next bottle jumped from 5 to 7.

Cast 009 93.3 50.0: #12 85m no confirmation - updated to #14 next depth

Cast 012 93 70- Really high NO3, Non confirm 1 and 2, finally caught up at 3

Cast 013 93.3 80.0- Non confirms at #’s 6, 11, 15, 16,17, 18 went from 16-18should be 19? Think #16 was a non closure 3 bottles still open at surface, sent back down to trip 48 m for prodo with # 22.

Cast 014 93 90- 2 non confirms at 380m non confirm at 270m and non confirms at 50m and 40m, Duplicates at 380 m and no 40m bottle

Cast 021 - 3500m deep cast "Scan length error: expected = 88, actual = 15" message seen during the upcast on-screen at 657m. No CTD sensor data collected between 1758m-1267m data on upcast - signal failure that restarted at 1266m to surface. Another glitch: oxygen upcast profile from ~1800-1300m looks wrong

Cast 023 90.0 70.0: Eventlog GPS wrong, computer serving GPS frozen

Cast 032 86.7 110.0- 4 bottles tripped at 29 m extras are 19 20 21 22 brought on deck reset 19-22; put back into water after resetting

Cast 039 83.3 55.0: bottle #21 mistripped, no closure

Cast 044 81.9 46.9- Popped 2 bottles at 20m, pulled CTD on deck emptied bottle 23 and sent back in to sample 10m depth. No ph data.

Cast 046 80 55- 15 m DIC Sample.

Cast 047 80 60-No ISUS Data.

Cast 050 80 90- Transmissometer spikey near terminal depth at 400-515m.

Cast 054 77 80- Inversion at 50m

Cast 062 87.45: ISUS sent in unplugged, returned to deck immediately but did not work

Cast 063 87.40: ISUS still not working even though the battery was replaced; went from 765 to 700 then back to 750 on upcast to get 15m-off-bottom bottle

Cast 064 87.35: still no ISUS data; down-welled O2 feature at 250m

Cast 065 85.4 35.8: No ISUS data

Cast 066 87.33: No ISUS data

Cast 067 86.8 32.5: ISUS data finally, main cable questionable

Cast 062-69: No reliable ISUS data.

Cast 073 90 37- Bottle 20 did not close, sent CTD back down and used bottle 24 to sample 20m 

Note: this page was updated 16Oct2015; CTD data was reprocessed using new data code format and final regressions were regenerated. 2015 reprocessing added data-quality code columns and data codes on bad or missing data ("9") or questionable data ("8"). Data values should not have changed from the previously published final CTD data. But the column number on updated CTD.csvs has changed from 65 to 82. Refer to the CTD.csv data format webpage: 65-column index; 82-column index

 
 
 
 
 
 
 
 
 
 
 
 
 
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