|CTD Processing Summary CalCOFI 1501NH CTD Final Data|
|Download 1501NH CTD raw cast files zipped||Download 1501NH FinalQC CTD + bottle data
Note: Metadata files compiled from CTD processing are split 1-64 (dual TCO), 65-100 (single TCO)
|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)||-0.00232||0.00084|
|Oxygen ml/L (dual Seabird SBE43)||y = 1.0507x - 0.0094
R² = 0.9997
|y = 1.0397x - 0.0132
R² = 0.9998
|Oxygen umoles/Kg (dual Seabird SBE43)||y = 1.0507x - 0.4099
R² = 0.9997
|y = 1.0397x - 0.5732
R² = 0.9998
|Nitrate - ISUS 4sec ave voltage vs Bottle Nitrate (Satlantic MBARI-ISUS v2)||y = 27.23x - 7.1464
R² = 0.9945
|Fluorometer - linear & polynomial regressions||
y = 7.1988x - 0.2187
R² = 0.8363
y = 7.2289x2+5.7762x-0.1677
R² = 0.839
|General notes: These are cast & final CTD Processing Notes from 1501NH cruise|
CalCOFI 1501NH General Cast Notes: This cruise occupied 100 stations: 93 standard, & 7 SCCOOS. The stations were occupied in traditional sequence but MBARI-SECRET 20nm stations, 63.65 63.75 63.85 & 63.95 were not occupied. SCCOOS stations 80.0 50.5 (too rough, windy night) & 85.4 35.8 (offline, shiptime) were not occupied. No CTD casts deeper than 770m were performed - no 1000m MBARI-SECRET casts on Line 63 & no 3500m casts on 90.90 or 80.90.
Cast 01 - non-confirmations for bottles #2 at 50m and #3 at 42m; suspect #1 was 60m then #2 was 36m, both prodo bottles. Noisy signal & spikes noted on upcast; downcast looks okay.
Cast 02 - SCCOOS shallow station immediately after Cast 01; signal noise but 4 bottles marked, tripped, & closed.
Cast 03 - SCCOOS shallow station; downcast prfiles looks okay; upcast: 5m bottle #4 did not close - carousel jumped from 4 to 2 so additional trips were necessary to catchup. CTD reterminated post-cast.
Cast 04 - 93.28 severe problems, lost 12hrs troubleshooting CTD issues; CTD reterminated after 150m of wire removed. CTD pumps are turning off at ~50m on downcast. Additional solutions attempted: 1) 1° conductivity sensor changed before cast; 2) carousel changes as per DAG suggestion; 3) new pump cable; 4) new pylon cable; 5) spare deck unit used; 6) dummied secondary pump WORKED. So secondary sensor data on casts 004 - 011 are bad.
Cast 04 - 11 primary sensor data good, secondary sensor bad - no pump
Cast 06 - bottom valves on bottle #1 & #20 replaced post-cast, drippy
Cast 08 - bottle #10 replaced, bottom o-ring leaking
Cast 12 - backup pump installed as 2°; dual conductors - black & white combined for signal, shield as ground. Both pumps & sensor sets are working.
Cast 15 - rockin-rolling
Cast 19 - 15kt winds but relatively calm
Cast 20 - some big rolls
Cast 21 - rolling
Cast 22 - windy, rolling
Cast 23 - going down slow 30m/min then 40m/min; sunny but windy & rough
Cast 24 - going down slow 30 then 40 - rough seas
Cast 25 - mid-size rollers
Cast 27 - calmer; two markers at 440m - file edited/corrected
Cast 29 - calm sunny
Cast 37 - calm bright but cloudy; transmissometer dropout @ 500m downcast
Cast 40 - small pH spike at 330m on downcast
Cast 45 - calm morning; Fukushima water collected from underway since all bottle needed
Cast 48 - no nav file; created one from marker file
Cast 60 - RS232 issues, deck unit reset seemed to fix the glitch; MET system froze & was reset as well. Extra 4om tripped & ignored
Cast 61 - relatively calm with some big rolls - trough
Cast 62 - deck unit error lights flashed red at 35m downcast; spikes in O2 135m downcast; fluorometer spike @ 458m upcast. Connectors checked and serviced post-cast.
Cast 63 - all sensors glitched out at 85m on downcast but transient
Cast 64 - carousel reset after major spike, RJ did not fire enough bottles to "catch-up" so no bottles closed less than 200m ie only the 1st 7 depths from 515 to 200 trapped water. Downcast does not look bad but the transmissometer dropped out at 450-515m downcast. Pre-cast notes by RJ: deck unit displaying zeros on all channels, changed sea cable slo-blow fuse & fast-blow fuse. Numbers came back but it was decided to run only primary sensors and disable secondary sensors & pump.
Cast 65T - test cast, primary T, C, O2 & pump only on white & black conductors. Looked at sliprings but did not see any obvious problem. Test successful.
Cast 65 - single sensors no problems at all
Cast 66 - Fukushima seawater collected at 25m bottle 19 (should have tripped another for 20L; used remainder of bottle 18) and surface bottle 22. Pr offset adjusted by -0.05.
Cast 69 - rough seas again
Cast 70 -71 - moderate rollers
Cast 73 - no nav file created - will create one from marker
Cast 75 - big rollers, transmissometer failure 450-515m downcast.
Cast 76 - big rollers, hard to hit target depths; transmissometer out at 500-515m
Cast 77 - big rollers, hard to hit target depths; transmissometer out at 480-515m
Cast 78 - big rollers, hard to hit target depths; transmissometer out at 480-515m
Cast 79 - rough sunny weather; Windex bottle broke in wetlab (ammonia?); transmissometer okay
Cast 80 - moderate seas; transmissometer dropped out ~450-515m downcast
Cast 81 - Transmissometer spikes ~430-490m
Cast 82 -84 - Transmissometer squirrely ~450-500m downcast; no spare (Goericke's spare uses older connector)
Cast 85 - crossed lanyards on bottles #2-3
Cast 86 - 100 - 12 bottle casts, Leg II after 8 scientists disembarked in Santa Cruz/Monterey
Cast 88 - 100 - Transmissometer squirrely ~400-515m downcast; no spare (Goericke's spare uses older connector)
Cast 92 - moderate rollers
Missing nav files created from mrk files: Cast 41, 62, & 73
Cast 09 - cast mislabeled 08 in hdr, hdr & hex files corrected using text & hex editors.
26Feb2015 / 16Aug2016(final update) / 08Mar2017 (CTD.csv file renaming; .asc file sensor-voltage relabeling)