Category: References
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Salinity
Salinity Determination OVERVIEW: This procedure describes the method for the determination of seawater salinity using a Guildline Portasal™ Salinometer (Model 8410). 1. Principle During a cruise a 24 bottle rosette is used to collect seawater salinity samples of ~225 mL from all bottles closed from pre-designated depths. A Guildline Instruments Portasal™ Salinometer (8410A) makes the precise…
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Primary Productivity Methods
PRIMARY PRODUCTIVITY OVERVIEW: Primary production is estimated from 14C uptake using a simulated in situ technique in which the assimilation of dissolved inorganic carbon by phytoplankton yields a measure of the rate of photosynthetic primary production in the euphotic zone. 1. Principle Seawater samples are incubated with a radioactive substrate to determine the…
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Primary Productivity History
PRIMARY PRODUCTIVITY CHANGES A description of the method was written February 2010 by D. Wolgast. Changes to the method are listed below. Radioactive Specific Activity Changes Section Date Prepared By Description 3.3 6/10/2016 D. Wolgast 25mCi diluted to 32uCi/ml Batch 0509YW4, 800mls 3.3 8/8/2014 D. Wolgast New 14C Stock: diluted to…
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ISUS Nitrate
ISUS Nitrate Sensor SUMMARY: Since November 2004, a Satlantic ISUS nitrate sensor has been integrated with a Seabird 911+ CTD-Rosette system deployed on CalCOFI cruises. Cruises typically occupy 75 stations, collecting approximately 1400 discrete seawater samples throughout the water column. The discrete seawater samples are analyzed at-sea for nitrate, nitrite, silicate, phosphate and ammonia…
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CalCOFI Data Report Publication Format Index
CalCOFI Data Report Data Description: Line 1, Field 1: Research Vessel Line 1, Field 2: Cruise Name Line 1, Field 3: CalCOFI Line & Station (CalCOFI’s standard line and station values) Line 3, Field 1 – 2: Latitude and Longitude of station at beginning of CTD upcast Line 3, Field 3 – 5: Cast…
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ISUS Nitrate History
ISUS NITRATE HISTORY The original methods description was written Feb 2010 by J. Wilkinson. Changes to the method or instrument are listed below. Changes Cruise/Ship Date Author Description 1611SR+ 11-06-2016 J.Wilkinson ISUS firmware upgraded to v3 allowing ISUScom software usage & sensor recalibration by SIO-CalCOFI, plus batch downloading via USB cable 1203SH+ 3-24-2012 L.…
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Sta.csv Index: 2014 Data Format
A station csv (sta.csv) is generated for each hydrographic station occupied during a cruise. Bottle data records for each depth are built & populated during sample analysis and data processing.
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CTD General Practices
CTD General Practices: System Description, Deployment, Data Aquisition, & Maintenance SUMMARY: Since 1993, the CalCOFI program has deployed a Seabird 911 CTD mounted on a 24-bottle rosette during seasonal, quarterly cruises off California. The CTD-rosette is lowered into the ocean to 515m, depth-permitting, on 75 hydrographic stations using the ship’s conductive-wire winch. Data from the…
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Casts.csv Index: SIO-CalCOFI Data Processing Format
SIO-CalCOFI data file casts.csv is the main hydrographic station information data file used by our data-processing software.