Repository of community practices in Ocean Research, Applications and Data/Information Management
Browsing CalCOFI Methods by Author "CalCOFI"
Now showing items 1-20 of 30
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Bottle sampling depths.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2017)The CalCOFI CTD-rosette is equipped with a Sea-Bird Electronic carousel water sampler (SBE 32), a computer-driven, electro-magnetically-released latch system. The 24 ten-liter plastic (PVC) bottles, equipped with epoxy-coated ... -
Bottom Depth Echo-Sounding Correction.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2018)CalCOFI has always corrected bottom depths reported using Carter Tables 50 & 51 for the CalCOFI operations area, California's west coast. -
CalCOFI bottle sampling.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2018)The CalCOFI CTD-rosette is equipped with a Sea-Bird Electronic carousel water sampler (SBE 32), a computer-driven, electro-magnetically-released latch system. The 24 ten-liter plastic (PVC) bottles, equipped with epoxy-coated ... -
CalCOFI CTD FAQ.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2017)General practices & notes on CalCOFI's Seabird 911/911+ CTD-Rosette -
Chlorophyll methods.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2015)Chlorophyll a is extracted in an acetone solution. Chlorophyll and phaeopigments are then measured fluorometrically using an acidification technique. -
CTD Data Algorithms.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2017)CalCOFI CTD data, particularly the thermodynamic properties, are computed by Seasoft based on EOS-80. Temperatures, typically from the primary temperature sensor, are merged with bottle sample data into station files which ... -
CTD Data Processing Protocol.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2019)Please note, the processing methods described use SIO-CalCOFI-developed software (DECODR & BtlVsCTD) to merge and correct Seabird 911+ CTD data with bottle samples. The Seasoft portion of our data processing protocol follow ... -
CTD General Practices: System Description, Deployment, Data Aquisition, & Maintenance.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2017)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 ... -
CTD Setup & Diagnostics: Seabird CTD-Carousel Setup & Deck Unit Diagnostics.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2017)SIO-CalCOFI’s method of terminating the sea cable uses a custom 4-pin pigtail to terminate a multi-strand conductive wire that allows each individual conductor to be used in any combination. Terminating the sea cable using ... -
CTD Standard Sensors.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2017)CalCOFI's primary hydrographic instrument is a Seabird 911+ CTD equipped with dual temperature, conductivity and oxygen sensors mounted on a 24-10L bottle rosette. Additional CTD sensors mounted on the rosette frame include ... -
CTD System.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2017)A Sea-Bird Electronics 911plus V2 CTD collects vertical profile data at every CalCOFI station. In addition to being a dual TCO (temperature, conductivity, and oxygen) system, the CTD also interfaces with a transmissometer, ... -
Dissolved oxygen.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2014)The amount of dissolved oxygen in seawater is measured using the Carpenter modification of the Winkler method. Carpenters modification (1965) was designed to increase the accuracy of the original method devised by Winkler ... -
Distance From Shore.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2013)Distance = Distance from shore in nautical miles. The CalCOFI database includes a calculated distance-from-shore value used primarily for vertical section plots published in the hydrographic data reports. CalCOFI line ... -
Hytech Salinometer.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2019)Prior to CalCOFI's use of Guildline's Autosal and Portasal, different instrumentation or techniques were used to measure seawater sample salinities. When I first participated in cruises in the mid-1980's, salinities were ... -
ISUS Nitrate history.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2017)The original methods description was written Feb 2010 by J. Wilkinson. Changes to the method or instrument are listed below. -
ISUS Nitrate sensor.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2015)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 ... -
Line.Sta Algorithms.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2014)Converting between geographic coordinates in latitude and longitude and the line and station sampling pattern of the California Cooperative Fisheries Investigations (CalCOFI) program is a commonly required task for conducting ... -
Methods Timeline.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2017)CalCOFI Time Series data are over 67 years old. New adopted practices, methods, software and hardware are thoroughly tested to maintain dataset continuity as the program & science evolves. Core measurements are maintained ... -
NCOG Sampling Method.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2015)NCOG Sampling For DNA and RNA Samples for NCOG Project -
Nutrient methods.
(California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2015)The phytoplankton macro nutrients nitrate, nitrite, silicate, and phosphate in seawater are analyzed using colorimetric assays. Ammonium concentrations are determined using a fluorometric assay.
