Browsing CalCOFI Methods by Issue Date

Now showing items 1-20 of 30

    • Distance From Shore. 

      CalCOFI (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 ...

    • Line.Sta Algorithms. 

      CalCOFI (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 ...

    • Dissolved oxygen. 

      CalCOFI (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 ...

    • Primary Productivity Protocol. 

      CalCOFI (California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2014)
      PRE-CRUISE PREPARATIONS 1. Check well in advance of cruise to be sure there is enough isotope ready to be used. This amount may vary depending on specific activity desired. Also, check scintillation fluid and all ...

    • Scintillation Counter 2008. 

      CalCOFI (California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2014)
      New(er) Beckman LS 6000IC (SysID# 231220) scintillation counter donated to SIO-CalCOFI by NOAA in early 2008. Repaired by SIO-CalCOFI and in service Oct 2008, replacing our broken/non-repairable Beckman LS 1801.

    • Salinity 

      CalCOFI (California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2014)
      This procedure describes the method for the determination of seawater salinity using a Guildline Portasal™ Salinometer (Model 8410).

    • Nutrient methods. 

      CalCOFI (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.

    • Chlorophyll methods. 

      CalCOFI (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.

    • ISUS Nitrate sensor. 

      CalCOFI (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 ...

    • NCOG Sampling Method. 

      CalCOFI (California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2015)
      NCOG Sampling For DNA and RNA Samples for NCOG Project

    • Underway Data Processing. 

      CalCOFI (California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2016)
      Underway Data Processing Methods

    • Bottle sampling depths. 

      CalCOFI (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 ...

    • CTD General Practices: System Description, Deployment, Data Aquisition, & Maintenance. 

      CalCOFI (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. 

      CalCOFI (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 ...

    • Methods Timeline. 

      CalCOFI (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 ...

    • ISUS Nitrate history. 

      CalCOFI (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.

    • Primary Productivity History. 

      CalCOFI (California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2017)
      A description of the method was written February 2010 by D. Wolgast. Changes to the method are listed below.

    • CTD System. 

      CalCOFI (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, ...

    • CTD Standard Sensors. 

      CalCOFI (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 ...

    • SeasaveV7 Setup & Data Acquisition. 

      CalCOFI (California Cooperative Oceanic Fisheries Investigation, La Jolla, CA, 2017)
      SeasaveV7 on Windows 7 CTD Operator's Cookbook