California Current Ecosystem LTER

Particulate Organic Carbon and Nitrogen (CalCOFI Cruise)

Title
Particulate organic carbon and nitrogen measurements at selected depths in the water column from CalCOFI-CCE Augmented cruises in the California Current System, 2004 - July 2020.

Abstract
Water column bottle samples at multiple depths are taken during CalCOFI cruises (since 2004, ongoing) at various CTD stations, filtered, and stored at -20°C. Measurements of particulate organic carbon (POC) and nitrogen (PON) are performed onshore in the lab where samples are acidified, dried and analyzed by high-temperature combustion. The sample and tin capsule react with oxygen and combust at 1000°C, and the sample is broken down, thus converting organic carbon to CO2 and reducing nitrogen oxides to N2 gas. Both gases are measured by thermal conductivity. Samples analyzed within the CCE constrain the mean C:N ratio of small particulates and by difference relative to measured living biomass, the biomass of suspended detritus.

Keywords
habitats, marine, measurements, carbon, organic matter, pocn, Organic Matter

LTER Data System Record
http://dx.doi.org/10.6073/pasta/cc17b24a88c32eee8c9132f9a19c82c3
Projects
California Current Ecosystem LTER
CalCOFI - Scripps Institution of Oceanography

Creators
Goericke, Ralf (rgoericke@ucsd.edu)

Contact
CCE LTER Information Manager (ccelter.im@gmail.com)

Data

table ParticulateOrganicCarbonandNitrogen
Main data table for dataset
Rows: 14986
Columns: 16
View / Download

Methods


General Methods
Measured for 1-L samples, filtered onto precombusted glass-fiber filters, dried for 48 h at 60°C, and analyzed by high-temperature combustion (Perkin Elmer Model 2400 Elemental Analyzer) relative to standards and blanks.

Frequency
Selected Stations Seasonally