2001RL CTD Processing Notes

CTD Processing Summary CalCOFI 2001RL CTD Final Data
Download 2001RL CTD raw cast files zipped		Download 2001RL Final CTD + bottle data
General CTD Notes - data acquisition notes, logistics, processing - see below. Please note that these regressions are generated from Final CTD vs 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"
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)	-0.00038	-0.000139
Oxygen ml/L (dual Seabird SBE43)	y = 1.0586x - 0.0316 R² = 0.9998	y = 1.0586x - 0.0259 R² = 0.9993
Oxygen umol/Kg (dual Seabird SBE43)	y =1.0583x - 1.3727 R² = 0.9997	y = 1.0058x - 0.0259 R² = 0.9863
Single sensors	Linear	Polynomial
Nitrate - ISUS 4sec ave voltage vs Bottle NO3 (Satlantic ISUS v3 SN111)	y = 27.119x - 13.481 R² = 0.9863
Fluorometer - linear & polynomial regressions	y= 7.3931x - 0.2186 R² = 0.8483	y = 5.0083x2+ 6.3337x - 0.1801 R² = 0.8496

General notes: These are cast & Final CTD Processing Notes from 2001RL cruise

CalCOFI 2001RL General Cruise & Cast Notes:

CalCOFI 2001RL sailed on Reuben Lasker at 1300 PDT 04 Janurary 2020 from 10th Avenue^th. All 75 science stations were completed including all northern lines, totalling 104 stations.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 NOAA 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. Primary Oxygen sensor was swapped out after cast 6 due to a high offset value. The PH sensor was also removed due to instrument issues and being serviced.

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#2533); Conductivity SBE 4 Sensor (SN#3568) Oxygen SBE 43 Sensor (SN#0680) Pump	SBE 3plus temperature sensor (SN#5109); Conductivity SBE 4 Sensor (SN#3569) 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):