|CTD Processing Summary CalCOFI 1404OS CTD Final Data|
|Download 1404OS CTD raw cast files zipped||Download 1404OS 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)||0.0003||0.0021|
|Oxygen ml/L (dual Seabird SBE43)||y = 1.0719x - 0.026
R² = 0.9994
|y = 1.0321x - 0.004
R² = 0.9994
|Oxygen umoles/Kg (dual Seabird SBE43)||y = 1.074x - 1.0524
R² = 0.9994
|y = 1.0342x - 0.1014
R² = 0.9994
|Nitrate - ISUS 4sec ave voltage vs Bottle Nitrate (Satlantic MBARI-ISUS v2)||y = 27.527x - 3.2941
R² = 0.9965
|Fluorometer - linear & polynomial regressions||
y = 14.198x - 0.7086
R² = 0.9041
y = 2.7581x2+11.449x-0.5092
R² = 0.9121
|General notes: These are cast & final CTD Processing Notes from 1404OS cruise|
CalCOFI 1404OS General Cast Notes: This cruise occupied 70 stations: 61 standard, & 9 SCCOOS. The station schedule was done normally with one exception, sta 87.50. Sta 87.50 was missed earlier in the cruise so it was occupied on the way home 17 Apr 2014. The CTD winch failed after the third station, Camp Pendleton SCCOOS 91.7 26.4 and required a return to port for repair. This resulted in a station work delay from 0044 30 Mar 2014 to 1625 01 Apr 2014 (PST); between stations 91.7 26.4 & 93.28. Although the watches & ship were operating on Daylight Savings Time, all data acquired and logged were recorded as PST.
Cast 03 - 04: CTD winch brokedown and require repair; returned to San Diego for two days.
Cast 08 - bottle 10 tripped prematurely; pH sensor not uncapped so pH data bad.
Cast 10 - substantial ship roll in moderate seas; bottle 19 was opened at surface so CTD was sent back down to 10m & bottle 22 tripped
Cast 11 - bottle 13 (70m) bottle valve sheared off during retrieval, no seawater collected.
Cast 16 - bottle 2 mistripped, bad O2 draw temperature indicated
Cast 18 - bottles 06, 13 & 16 lids did not close properly; bottles 13 & 16 replaced post-cast; #6 will be monitored for repeat problem
Cast 21 - moderate seas, windy
Cast 23 - double trip at 85m bottles 12 & 13 so an extra marker was done at 74m bottle 14; bottle 13 labeled mistrip - salt only since duplicate
Cast 24 - trigger #1 replaced since sticking - O2 draw temp too high; switched to a larger trolley shackle
Cast 29 - sta named 90.0 29.0 - should be 90.0 27.7 > fixed in files
Cast 30 - calm evening
Cast 33 - files named incorrectly and corrected: 1402033 >>> 1404033
Cast 35 - Santa Monica Basin station PRODO cast to 750m, no terminal bottle tripped since LTER needed a 10m bottle & 23 needed for prodo
Cast 36 - calm, cold foggy; ~2nm for desired position due to Naval Operation
Cast 37 - CTD yo-yo'd from 171 to 131 to 141 due to winch miscommunication
Cast 42 - CTD yo-yo'd from 230 to 200 to 210 due to winch miscommunication, radio static
Cast 44 - bottle #1 mistrip, lanyard on the right - should be on the left, less friction.
Cast 47 - restarted downcast since data acquistion was not started, CTD was returned to surface and cast restarted
Cast 48 - winch could only go down at 30m/min & recover at 20m/min then was unable to lift the CTD out of the water; ~14mins of surface data was acquired before the acquisition was shutdown during delayed recovery. Hydraulics repaired before the next cast without any significant station delay.
Cast 51 - file misnamed 52 > fixed in files
Cast 69 - rough, sunny afternoon