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CTD Processing Summary CalCOFI 1402SH CTD Data
Download 1402SH CTD raw cast files zipped Download 1402SH FinalQC CTD + bottle data
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) -0.0011 -0.0004
Oxygen ml/L (dual Seabird SBE43) y = 1.053x - 0.0121
R² = 0.9998
y = 1.0161x + 0.0053
R² = 0.9999
Oxygen umol/Kg (dual Seabird SBE43) y = 1.0545x - 0.3454
R² = 0.9998
y = 1.0176x + 0.4011
R² = 0.9999
Single sensors
Nitrate - ISUS 4sec ave voltage vs Bottle Nitrate (Satlantic MBARI-ISUS v2) y = 27.413x - 3.6183
R² = 0.9934
 
Fluorometer - polynomial & linear regressions y = 6.7287x - 0.2248
R² = 0.6925
y = 5.4518x2 +5.5523x - 0.1786
R² = 0.6940
  
Primary CTD O2 Sensor vs Bottle O2
  
Secondary CTD O2 Sensor vs Bottle O2
Primary CTD O2 Sensor vs Bottle O2 Secondary CTD O2 Sensor vs Bottle O2
MBARI-ISUS Voltage vs Bottle NO3 Wetlabs Fluorometer Voltage vs Chlorophyll-a
 
General notes: 

NOAA RV Bell M. Shimada had severe engine problems that required the ship return to San Diego for repairs after completing 36 stations. Unfortunately, the length of repairs put the remainder of the cruise out of the winter cruise target date window. No other ships were available - SIO RV New Horizon was in dry dock.

These are from the final bottle data comparisons.

Cast Notes:

Cast 000 - Sound velocity acoustics calibration cast in San Diego Bay, 10m; pr sensor offset applied post-cast -0.150

Cast 002 - no ISUS data, no battery? Shallow SCCOOS station

Cast 003 - ISUS data looks bad, battery? Shallow SCCOOS station

Cast 005 - Bottle #17 mistrip, no closure

Cast 007 - artificial (caused by winch wire jerk) chl spike at 20m

Cast 008 - Eventlog lost gps at depth, CTDatDepth event position may be bad; gps data in CTD data files should be fine

Cast 013 - lots of ship roll

Cast 015 - bottle #11 tripped early; extra marker at 11, skipped marker at 12, corrected post-cast

Cast 016 - CTD yo-yo'd on upcast between 125 & 140, 125m bottle tripped then CTD was lower to get forgotten 140m bottle

Cast 019 - bottle #23 no closure, winch communications issues slowed the cast

Cast 020 - extra surface bottle tripped for test case

Cast 023 - (Superbowl Sunday!)

Cast 024 - raining, fairly calm

Cast 026 - file named incorrectly, corrected post-cast

Cast 027 - no nav file created

Cast 034 - two markers/one bottle at terminal depth; missed tripping 5m bottle (cast depth <75m)

Cast 035 - Santa Monica Basin, bottle tripped first before CTDatDepth event logged because of close proximity to the bottom.

Cast 036 - last cast, ship engine problem required return to San Diego.


14Mar2015









 
 

 
 
 
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