Author: James Wilkinson
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Brief History
The origin of CalCOFI through the decline of the Pacific sardine fishery (excerpt from The CalCOFI Book by Sam McClatchie, Springer Publishing) Created in the 1920s, the sardine fishery hit its peak in the 1930’s and the Pacific sardine (Sardinops sagax) quickly became the largest fishery on the North American Pacific coast. However, within a…
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Recent Photos
All images ©James R Wilkinson/SIO-CalCOFI (click image for higher resolution) Please checkout CalCOFI photo albums on Facebook & Google+ (8″ 300dpi image links: tif, png, jpg) All images ©James R Wilkinson/SIO-CalCOFI (click on image for…
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DIC CSV Index
DIC CSV Column Header Index CSV Column Header Description Cast_Index CalCOFI Hydrographic Database Cast Table Index; 1 = CalCOFI database’s 1st cast record Bottle_Index CalCOFI Hydrographic Database Bottle Table Index; 1 = CalCOFI database’s 1st bottle record Cruise CalCOFI Cruise Designation with century prefix; CalCOFI 0901 = 200901 Depth(m) Sample Depth in meters Line.Sta_ID CalCOFI…
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DIC: Dissolved Inorganic Carbon
CalCOFI collects samples for inorganic carbon and total alkalinity at specific stations throughout the cruise track. Seawater samples are collected from several depths, preserved and brought back to SIO for total inorganic carbon and total alkalinity analysis. These measurements allow the calculation of pH and pCO2. The objectives of these measurements are: first, the long-term…
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Nano-Microplankton Abundance & Biomass
CCE-LTER asseses the microbial community assemblages of the California Current ecosystem (CCE) for abundance and biomass using high-throughput digital epifluorescence microscopy. Samples to estimate the nano- and microplankton (0.2-2.0-µm and 2.0-20-µm size, respectively) are collected, preserved, stained, and filtered onto a membrane filter and mounted on a glass microscope slide in the field. Slides are…
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Taxon-Specific Phyto-Pigments
CCE-LTER uses a high-performance liquid chromatographic (HPLC) method with a reverse phase C8 column to measure concentrations of chlorophylls and carotenoids in samples of particulate matter from the California Current Ecosystem (CCE). Concentrations of chlorophyll a are used as a proxy for phytoplankton biomass and concentrations of other taxon-specific pigments are used to determine contributions…
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Size Fractionation
CCE-LTER determines the size distribution of total chlorophyll a by filtering water though filters of differing pore sizes, extracting these in acetone and analyzing fluorometrically. Using size fractionation of chlorophyll a and taxon-specific pigments (chlorophylls and carotenoids) from HPLC analysis, the samples analyzed within the California Current Ecosystem are used to develop a metric for…
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2014 CalCOFI Conference
2014 CalCOFI Conference was held at the Scripps Seaside Forum, Scripps Institution of Oceanography, in La Jolla, CA ( Map ) Dec 8 – 10. Thanks to everyone who attended and participated. The topic for the 2014 Symposium convened by Dave Checkley, SIO: Predicting the California Current System – Please review CalCOFI Reports Vol 56, 2015 for…
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1210NH Cruise Summary
Summary: All 75 stations occupied: 66 standard & 9 SCCOOS 20m isobath stations Data Links: 1210NH CTD Cast Files; Final bottle-corrected CTD csvs, plots, & metadata; Cruise Dates: 19 October – 05 November 2012 (Fri – Mon) Load Dates: 16 – 18 October 2012 at MarFac, Pt Loma (Tues – Thurs) Offload Date: 06 Nov 2012 (Tues)…
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1207OS Cruise Summary
Summary: CalCOFI Leg 1: 75 stations occupied, 66 standard & 9 SCCOOS 20m isobath stations Data Links: 1207OS CTD Cast Files; FinalQC bottle-corrected CTD csvs, plots, & metadata Cruise Dates: CalCOFI Leg 1: Mon 2 Jul, depart San Diego – Thu 19 Jul, return San Diego, CA (18 DAS) CCE Leg 2: 22 Jul San Diego…