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CalCOFI 9804JD CTD Notes
1998 was an El Nino year and CalCOFI sailed on monthly cruises: 4 typical quarterly cruises and 7 one-week, line 90 & line 80 cruises. 9804JD was the full Spring CalCOFI. At this time, CalCOFI was deploying a SBE 911+ Seabird CTD on a 24-10L rosette using a General Oceanics Pylon (1015-24). A single set of temperature (SBE 3F), conductivity (SBE 4), and oxygen (SBE 13) driven by a 3k pump (SBE 5) were deployed. Additional sensors on the array were: Seatech 20cm transmissometer, Seatech fluorometer, Biospherical QSP200 remote PAR & Surface PAR, Benthos altimeter & pinger (notes referencing PDR pinger traces may be more reliable than altimeter at that time).
In Aug 2016, the CTD data were reprocessed so importing into the CalCOFI CTD database would be possible. This required running the DOS version Seasoft 4.4 on Windows XP using Virtual Box in Windows 7. Once asc files were generated, BtlVsCTD (CalCOFI CTD + bottle merging program), was run in Windows 7 togenerate CTD.csvs. Plots of CTD 1m profiles with bottle data were generated using Matlab.
Cast Notes:
CTD Console Operator Notes (EHR, JLM, DG):
Sensors: Pressure SBE9: 39873; Temperature SBE3: 1074; Conductivity SBE4: 722; O2 SBE14:130120;
SBE 9: 93235-203; Pump: 252; Rem PAR: 4271; Ref PAR: 6139/3149; Fluor: 91s; Trans: 164; Pinger used for height off bottom.
Note: typically chl max notes are not listed but this cruise's are particularly deep for a Spring CalCOFI, plus there is not an abundance of notes
Cast 01: no notes
Cast 02: JLM wrote they drifted off station during the MER cast and bottom shoaled so terminal depth was 460 since the pinger was not turned on precast.
Cast 03: chl max @30m
Cast 04, 05 chl max @ 40m
Cast 06: two markers at 80m, corrected, prodo
cast 07: chl max @ 85-90m
cast 08: chl max @ 85m, wide max
cast 09: chl max @ 100m
cast 10: chl max @ 120m, prodo
cast 11: chl max @ 115m
cast 12: chl max @ 100m
cast 13: chl max @ 110m
cast 14: chl max @ 125m prodo
cast 15: chl max 115, mixed layer 100m
cast 16: chl max @ 135m
cast 17: chl max @ 128m; 45m secchi; prodo
cast 18: chl max @ 125m; wire angle changing depths ~5m
cast 19: chl max @ 115m; salinity inversion @115m
cast 20: chl max @ 120m
cast 21: chl max @ 115m, prodo
cast 22: chl max @ 115m, wire angle changing, lots of repositioning
cast 23: chl max @ 95m
cast 24: chl max @ 34-40m
cast 25: chl max @ 30m, no prodo due to Navy Ops extending transit time, too late for LAN; 2 Mitchell bottles
cast 26: chl max @ 40m, bottom depth changing rapidly
cast 27: chl max @ 15m, shallow sta ~55m
cast 28: chl max @ 30m
cast 29: chl max @ 0-25m
cast 30: chl max @ 10-20m, secchi 10m, prodo, two markers at 380 - corrected
cast 31: no notes
cast 32: chl max @ 35m
cast 33: shallow 76m station; pinger reads ~7m from bottom @ bottle #1
cast 34: chl max @ 30-90m broad max; lanyard in lid #4, H2O bad
cast 35: no notes
cast 36: chl max @ 90m
cast 37, 38: chl max @ 100m
cast 39: chl max @ 100m prodo
cast 40: chl max @ 135m, wire angle changing, tension spiking slowed from 60m/min to 30m/min
cast 41: chl max @ 80m
cast 42: chl max @ 90m, prodo
cast 43: chl max @ 95m
cast 44: chl max @ 80m
cast 45: chl max @ 95m, prodo
cast 46: JRW serviced PAR cable - regreased and cable tie added
cast 47,48: no notes
cast 49: chl max @ 0-30m
cast 50: no notes
cast 51: Santa Barbara Basin, 20m chl max, wire angle variable, PDR showed ~6m off bottom at #1 trip; fluorometer output switched to 1x prior to this cast
cast 52: no notes
cast 53: chl max @ 25m
cast 54: chl max @ 60m, duplicate marker at 320 - 20 bottles, 21 markers -corrected
cast 55: chl max @ 60m
cast 56: no notes
cast 57: chl max @ 117m, wire angle changing = chasing target depths
cast 58: chl max @ 105m
cast 59: chl max @ 125m, prodo, bottle #11 dropped so O2 test case at surface could be tripped - 100m mixed layer
cast 60: no ntoes
cast 61: chl max @ 70m
cast 62: chl max @ 79m
cast 63: chl max @ 65m; pylon evidently mis-set, bottles actually tripped were 24, 1-21. 22-23 were untripped. Samples were drawn assuming order as edited, marker corrected by EHR
#24 was 515, #1 was 440...#21 was surface, lanyards shifted by 1 spot to the left (GO pylon)
cast 64: chl max @ 50m
cast 65: chl max @ 0-20m
cast 66: chl max @ 0-20m
cast 67: no notes
cast 68: prodo, type 1
cast 69: no notes
cast 70: chl max @ 88m
cast 71: chl max @ 80m
cast 72: chl max @ 75m, prodo
cast 73: chl max @ 75m, upcast differs from downcast
cast 74: no notes
cast 75: chl max @ 70m, strong gradient
cast 76: low surface S, very sharp S gradient
cast 77: no notes
cast 78: chl max @ surface
cast 79: shoaling bottom, start depth 413m, terminal depth 377m, pinger showed CTD ~10m off bottom at depth
cast 80: no notes
cast 81: chl max @ 0-20m + peak at 80m & transmissometer peak to match
cast 82: chl max @ 10-20, smaller max at 85m; suface salinity < 32 with very sharp gradient at 10m
cast 83: chl max @ 65m, smaller peak at 40m (reversed); bottles #12 & 13 reversed, out of order (#12 @ 85m; #13 @95m)
cast 84: chl max @ 75m; fired #4, no confirmation, fired again, got confirmation; bottle #4 opened at surface, skipped during sampling
cast 85: chl max @ 70m, last station 67.80
Date: 09/06/2016; console ops notes from 9804JD cast notebook
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