1907BH CTD Processing Notes

CTD Processing Summary CalCOFI 1907BH CTD Final Data
Download 1907BH CTD raw cast files zipped		Download 1907BH Final CTD + bottle data
General CTD Notes - data acquisition notes, logistics, processing - see below. Please note that these regressions are generated from processed CTD vs FINAL bottle data and are considered done. CTD temperatures and salinities may not have changed significantly but oxygen, estimated chlorophyll-a, estimated nitrate may be significantly different than preliminary data. Questionable or mistrip bottle data have been removed from the correction regressions but may be visible on the CTD.csv plots. For this cruise and future cruises, both primary & secondary sensor profiles vs bottle data will be generated and archived in the downloadable CTD+Bottle data files. These plots are under the "csv-plots\Primary" & "csv-plots\Secondary" subdirectories.
CTD sensor corrections derived by comparing CTD sensor data, 4sec averages prior-to-bottle closure, to bottle samples
Dual T, S, & O2	Primary Sensor	Secondary Sensor
Salinity offset (bottle - CTD salinity; > 350m only; Seabird SBE4)	-0.0033	-0.0061
Oxygen ml/L (dual Seabird SBE43)	y = 1.0223x - 0.0043 R² = 0.9997	y = 1.0334x + 0.0523 R² = 0.9997
Oxygen umol/Kg (dual Seabird SBE43)	y =1.0213x + 0.1182 R² = 0.9999	y = 1.0319x + 2.4074 R² = 0.9998
Single sensors	Linear	Polynomial
Nitrate - ISUS 4sec ave voltage vs Bottle NO3 (Satlantic ISUS v3 SN111)	y = 27.2958x - 27.8866 R² = 0.9929
Fluorometer - linear & polynomial regressions	y= 11.0834x - 0.4148 R² = 0.8742	y = 8.9265x2+ 6.5138x - 0.1721 R² = 0.8943

General notes: These are cast & preliminary CTD Processing Notes from 1907BH cruise

CalCOFI 1907BH General Cruise & Cast Notes:

CalCOFI 1907BH sailed on RV Bold Horizon at 0800 PDT 11July2019 from 10^th Ave Marine Terminal San Diego. 70 of 75 science stations were completed. Approximately 12 hours were lost early in the cruise due to satellite communications malfunction. The ship diverted from the standard CalCOFI cruise track after 93.3 45.0 north to San Clemente Island to affect repairs and resumed work at 93.3 50.0. Service and support from the ship was excellent.

CTD General Notes and Problems:

CalCOFI used their 24-10L CTD-rosette with a two-pin termination, cable grip, deck unit, monitor, mouse &. SIO-CalCOFI installed their CTD blade PC (Win7), surface PAR; remote depth readout box; and wired/wireless data network. SIO-CalCOFI's Seabird 911+, 24-bottle epoxy-coated rosette with standard bridle was deployed by the Bold Horizon winch system.
Standard sensor configuration: dual T, C, & O2 on separately plumbed & pumped horizontal arrays; Wetlabs ECO-Fl fluorometer; C-Star transmissometer; Biospherical PAR & Surface PAR (mounted on the LTER GP van); MBARI-ISUS v3 w/ battery; SBE18 pH; altimeter. Refer to .hdr files for serial & model numbers or the table below. All sensors expcet ISUS; worked fine throughout the cruise and no changes were necessary. ISUS had minor issues during the first 13 stations of 70; due to ISUS battery.

Setup: Using SIO-CalCOFI's 24-10L bottle CTD-rosette epoxy-coated standard bridle frame. CTD - SBE 9+ (SN#3161-0936) Sensor Configuration
1° Sensors: freshly calibrated	2° Sensors:
SBE 3plus temperature sensor (SN#5109); Conductivity SBE 4 Sensor (SN#3569) Oxygen SBE 43 Sensor (SN#3284) Pump	SBE 3plus temperature sensor (SN#5102); Conductivity SBE 4 Sensor (SN#2206) Oxygen SBE 43 Sensor (SN#1075) Pump
Other sensors (unpumped)
Wetlabs ECO/FL Fluorometer SN#3122 Wetlabs C-Star Transmissometer SN#CST-811DR pH SBE 18 SN#0709 Remote PAR SN#70209	CCE-LTER MBARI-ISUS v3 SN#111 Altimeter SN#46604 Carousel SBE 32 3217964-0225 Reference PAR SN#20514

Logistics & General System/Sampling Notes:

Cast Notes (transcribed from console ops, clipboard notes, & data processing):