CTD Processing Summary CalCOFI 0804JD CTD Final Data (reprocessed/reformatted 08/2018) | |||||||||||||||||||||
Download 0804JD CTD raw cast files zipped | Download 0804JD FinalQC CTD + bottle data | ||||||||||||||||||||
General CTD Notes - data acquisition cast notes, logistics, processing notes are listed below | |||||||||||||||||||||
CTD sensor corrections derived by comparing 4 secs of CTD sensor data (prior to bottle closure) to bottle samples | |||||||||||||||||||||
Dual T & S | Primary Sensor | Secondary Sensor | |||||||||||||||||||
Temperature, dual SBE3 | No offset or correction | No offset or correction | |||||||||||||||||||
Salinity offset (bottle - CTD salinity; > 350m only; Seabird SBE4; fliers excluded) | -0.0016 | 0.0025 | |||||||||||||||||||
Single sensors - note only one CTD O2 sensor ml/L uM/Kg | |||||||||||||||||||||
Oxygen (ml/L & uM/Kg; single Seabird SBE43) |
y = 1.0122x - 0.0208 R² = 0.9998 |
y = 1.0122x - 0.9053 R² = 0.9998 |
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Nitrate - Satlantic MBARI-ISUS (SN 111) |
y = 30.718x - 6.9314 R² = 0.9908 |
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Seapoint Fluorometer - linear & polynomial regressions |
y = 4.9751x - 0.259 R² = 0.6513 |
y = 3.4204x2 + 1.9413x + 0.0311 R² = 0.7366 |
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General notes: Station Pattern & Cruise Track
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Leg 1: CalCOFI 0804JD • 24 Mar - 9 Apr 2008 • NOAA RV David Starr Jordan • San Diego to San Diego
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Voltage | Sensor |
V0 | Trans |
V1 | Fluor |
V2 | ISUS |
V3 | |
V4 | O2 |
V5 | |
V6 | ALT |
V7 | PAR |
CalCOFI 0804JD CTD Data Processing & Console Ops Notes
Removed salt fliers on both primary & secondary comparisons.
No deep CTD casts (>515m) were performed on Leg 1 but 1000m casts were performed on Leg 2 on MBARI Line 67 (66.7) stations.
Only one O2 sensor was deployed, no ISUS, no Surface PAR, no pH. These were purchased in mid-2009 and first deployed on CalCOFI 0907M2 when a new 911+ system was bought.
V2 Deck unit was also purchased at that time so this cruise was on V1 Deck Unit - requiring Align-CTD offset of secondary conductivity (0.073sec).
Original hdr file on cast 001 & 002 require correction - normal fields were not setup before the 1st cast since a new version of Seasave was installed. It was fixed on cast 003. Casts 001 & 002 hdr files were edited during processing - note the .hex binary file has not been corrected on casts 001 & 002.
CalCOFI 0804JD CTD Cast & Data Processing Notes
The first station was after 1800PST because of acoustics calibration at the start of the cruise. No prodo station on day 1.
Cast 001 sta 93.3 26.7: hdr fields created post-cast since form was not setup in the new version of Seasave (v7). ISUS operational but very noisy-spikey on downcast 0-15m.
Cast 002 SCCOOS sta 93.4 26.4: hdr field created but station was entered into cast field, corrected post-cast. Not corrected in the .hex file.
Cast 003 SCCOOS sta 91.7 26.4: hdr file format working now, ISUS working fine
Cast 004 sta 93.3 28.0: buoy on station, had to move off station, short delay; ISUS working fine
Cast 005 sta 93.3 30.0: chl max 32m; ISUS working
Cast 006 sta 93.3 35: prodo station, ISUS looks good
Cast 007 sta 93.3 40.0:some noise-spikes on downcast profiles but processed data look fine/smooth
Cast 008 sta 93.3 45.0: salinity spikes noted from 0-5m on downcast (pumps catch air?); bottle #18 spring loop snapped, replaced with bottle #24 temporarily - then a large crack in bottle #24 was noticed (not used yet this cruise). Replaced from spare bottle pool. mrk #17 missed, hand-edited post-cast.
Cast 009 sta 93.3 50.0: Wind 20kts, moon @3/4; 40m chl max
Cast 010 sta 93.3 55.0: winds 20-23kts, seas picking up a bit; down at 30m/min then 48m/min; 30m chl max
Cast 011 sta 93.3 60.0: prodo station
Cast 012 sta 93.3 70.0: downcast profiles have some noise, not sure about the cause, response looks alright
Cast 013 sta 93.3 80.0: cold night, moderate seas, down at 30 then 40 eventually 45m/min; new ISUS battery installed pre-cast but ISUS went to zero ~15-30m on downcast
Cast 014 sta 93.3 90.0: prodo station, ISUS looks fine this cast, no dropouts
Cast 015 sta 93.3 100.0: chl max 100m, ISUS good, nothing else noted
Cast 016 sta 93.3 110.0: chl max 80m, double mrk at #9, edited post-cast; ISUS okay
Cast 017 sta 93.3 120.0: early prodo station; winch operator Vlad reset wire count accidentally between 31-21m, had to go back down to 21m; ISUS good
Cast 018 sta 90.0 120.0: bottom contact alarm sounded off @30m on downcast - erroneous most likely or something big swam by; forgot to trip the surface bottle so it was put back into the ocean for bottle #20 (2m).
Cast 019 sta 90.0 110.0: altimeter still acting up, causing bottom contact alarm to sound; serviced the altimeter and fluorometer Y-cable post-cast; new ISUS battery installed post-cast; ISUS profile good; chl max 91m
Cast 020 sta 90.0 100.0: early prodo cast; CTD yo-yo'd @325m by winch operator Vlad; ISUS good
Cast 021 sta 90.0 90.0: nothing noted, ISUS looks good
Cast 022 sta 90.0 80.0: chl max 60m; point-checking note - "no 140m bottle trip, both bottle tripped at 125m - two 125m markers", not a mistrip but a missed-trip, not noted on console ops by operator; ISUS good
Cast 023 sta 90.0 70.0: 28kt winds - seas picking up again; deck test pre-cast; LTER cardinal sta; cold night, some rolls; wire angle high from 515 to 200m upcast; modem error message from carousel ~440m upcast; CTD yo-yo a couple time to get target depths
Cast 024 sta 90.0 60.0: prodo station; serious (~40m extra) wire angle
Cast 025 sta 90.0 53.0: mislabeled cast 024 initially, fixed post-cast in all files; ISUS data "stair-stepping" & spikey - low battery
Cast 026 sta 90.0 45.0: new ISUS battery installed pre-cast, ISUS looks good
Cast 027 sta 90.0 37.0: sunrise station, dolphins spotted; chl max 20m mixed layer 20m; deck tested
Cast 028 sta 90.0 35.0: prodo station
Cast 029 sta 90.0 30.0: nothing noted
Cast 030 sta 90.0 28.0: 62m bottom, cast to 55m - altimeter read 10m from bottom; bottle #4 leaking slightly from bottom cap
Cast 031 sta 86.7 33.0: 54m bottom, cast to 50m, altimeter 6.8m
Cast 032 sta 86.7 35.0: spikey chl & transmissometer profiles - particulates?; ISUS battery changed post-cast; transmissometer cable serviced post-cast
Cast 033 sta 86.7 40.0: Santa Monica Basin station; fresh ISUS battery; cast to 787m, 9m off bottom
Cast 034 sta 86.7 45.0: 23-bottle prodo cast
Cast 035 sta 86.7 50.0: San Nicolas Island station, shallow 76m bottom, cast to 70m, 8.3 on altimeter
Cast 036 sta 86.7 55.0: chl max 22m; nothing noted, ISUS good
Cast 037 sta 86.7 60.0: chl max 25m, nothing noted, ISUS good
Cast 038 sta 86.7 70.0: calm , cold night; ISUS good, battery changed post-cast; chl max 40m, mixed layer 50m; deck test pre-cast
Cast 039 sta 86.7 80.0: 22 bottle prodo cast to 515m; ISUS good
Cast 040 sta 86.7 90.0: chl max 45m, mixed layer 55m; nothing else noted
Cast 041 sta 86.7 100.0: 22 bottle cast to 515m, extra chl max bottle for LTER; chl max 71m; calm night; ISUS good
Cast 042 sta 86.7 110.0: 24 bottle prodo cast (2 test cases tripped); no ISUS data collected(?), nothing noted
Cast 043 sta 83.3 110.0: super calm seas, man overboard drill prior to station; ISUS back & good
Cast 044 sta 83.3 100.0: replaced ISUS battery before cast but no data collected (???)
Cast 045 sta 83.3 90.0: ISUS working this cast; unusual salinity and other profiles between 50-150m; chl max 36m, mixed layer 11m
Cast 046 sta 83.3 80.0: 22 bottle prodo cast to 515m; ISUS working
Cast 047 sta 83.3 70.0: chl max 45m, mix[ed layer depth 20m; ISUS working
Cast 048 sta 83.3 60.0: rough weather, CTD prepped on station, winds 35+kts but not rolling bad yet; cold night; high surface NO3; extra bottle closed at 70m (#13-14); ISUS good
Cast 049 sta 83.3 55.0: rough marginal conditio/ns, 38+kt winds, surface cold & high NO3, steep O2 gradient; chl max 0-30m, mixed layer 50m; ISUS working
Cast 050 sta 83.3 51.0: shallow 13 bottle prodo station, bottom 108m, cast to 100m; ISUS good
Cast 051 sta 83.3 42.0: shallow 130m bottom, 12 bottle cast to 116m; visibly green, chl max 5m, 10m mixed layer; ISUS working
Cast 052 sta 83.3 40.6: 33m bottom, 6 bottle cast to 26m; LTER asked for a 10m bottle after arriving to surface so CTD was sent back to 10m bottle #6; chl max 15m
Cast 053 sta 81.8 46.9: Santa Barbara Basin station, 24 bottle cast to 574m, ~7m off bottom; very shallow mixed layer ~8m; steep O2 gradient 10-20m along with NO3; salts >34 PSU by 20m; ISUS working
Cast 054 sta 80.0 51.0: Pt Conception Station, 76m bottom, 9 bottle cast to 71m; chl max 6m
Cast 055 sta 76.7 49.0: headed north to Line 77 after 80.51; no prodo today, Bryan taken ashore at Avila Beach for minor medical problem; shallow 65m station, 8 bottle cast to 60m
Cast 056 sta 80.0 55.0: back to line 80; no Knudsen bottom depth but ~780m so no worries about hitting bottom; cold night, moderate seas; surface temp still cold (~10.7) with high NO3; ISUS worked on downcast and most of upcast (bad from ~130-0m); chl max 25m, mixed layer to 30m
Cast 057 sta 80.0 60.0: getting rough again, 30-40kt winds, cold sunrise; ISUS not working although pre-cast battery voltage was 12.6v; bottle #13 tripped but did not close; chl max 0-50m, mixed layer to 50m
Cast 058 sta 80.0 70.0: ISUS not working, partial pieces so data column needs to be flagged - done in processed CTD.csv
Cast 059 sta 80.0 80.0 (21:00 07 Apr 2008): fluorometer was pegged @ 0m before cast, restarting Seasave and all was well (?); bottle #13 did not trip; RTL's last CalCOFI cast; ISUS working
Leg 2: ISUS removed; most SIO personnel not onboard, only "trooper" JLW; please note cast number 150-177
Cast 150 sta 76.7 51.0 (12:38 23 Apr 2008): starting on Line 77 inshore, picking up stations missed Leg 1 due to very bad weather which caused the long Leg 2 delay; ~232m bottom, 15 bottle cast to 227m
Cast 151 sta 76.7 55.0: double chl peak noted, nothing else; no ISUS; 20 bottle cast to 515m
Cast 152 sta 76.7 60.0: bottle #8 did not close; 20 bottle cast to 515m
Cast 153 sta 76.7 70.0: secondary chl peak @90m; bottle #8 not closed again; cast mislabeled 152 instead of 153, fixed post-cast by AEH; 20 bottle cast to 515m
Cast 154 sta 76.7 80.0: 21 bottle cast to 515m, extra bottle closed @170m since #8's been mistripping
note cast numbering on Leg 2 is not consecutive due to NOAA's order occupied including trawl & net tow stations
Cast 160 sta 76.7 90.0: 21 bottle cast to 515m, extra bottle closed @170m since #8's been mistripping; broke end caps off #8 while retrieving
Cast 161 sta 76.7 100.0: 21 bottle cast to 515m, extra bottle closed @170m since #8's not working; deck unit alarm sounding at 100m to surface on upcast; no Knudsen bottom depth, not working this cast
northern Lines, changing to 12 bottle rosette sampling (1, 3, 5,... table-driven)
Cast 162 sta 73.3 90.0: accidentally tripped a bottle at 70m instead of 60m, skipped 60m
Cast 164 sta 73.3 80.0: chl max 18m, mixed layer to 43m
Cast 165 sta 73.3 70.0: Temp, O2 inversion @35-40m, also seen on transmissometer, not seen on salts
Cast 166 sta 73.3 60.0: double chl peaks again, 3 O2 inversions
Cast 167 sta 73.3 55.0: chl max 5m, 22m mixed layer
Cast 168 sta 70.0 55.0: secondary chl max @39m, 1st @18m, 20m mixed layer
Cast 169 sta 70.0 60.0: 12 bottle cast to 515m, nothing noted
Note: starting MBARI SECRET Line 67 1000m stations, every 20nm ie 66.7 60.0, 65.0, 70.0, 75.0, 80.0, 85.0, 90.0
Cast 170 sta 66.7 50.0: moved ~4nm west to get 1000m bottom for MBARI CTD casts - ~sta 66.7 51.0; 12 bottle cast to 1037m
Cast 172 sta 66.7 55.0: 12 bottle cast to 1023m; chl max 36m, mixed layer 38m
Cast 173 sta 66.7 60.0: 12 bottle cast to 1014m; chl max 20m, 40m mixed layer
Cast 174 sta 66.7 65.0: 12 bottle cast to 1033m; chl max 25m, 20m mixed layer
Cast 175 sta 66.7 70.0: 12 bottle cast to 1035m; O2 @200m looks a little crazy (checked out in point-checking post-cruise), temp & transmissometer look unaffected
Cast 176 sta 66.7 75.0: 12 bottle cast to 1032m; same O2 feature between 200-300m as last stn
Cast 177 sta 66.7 80.0: 12 bottle cast to 1028m; rough seas, salinity inversion @50m, O2 inversion @200m again, Temp inversion @50m too
JRW 09/07/2018