Compiled global dataset of PIC/POC and bSi concentrations measured by in situ pumps on multiple research cruises conducted from between 1973 and 2013 (NCEI Accession 0291517)

This dataset contains chemical data collected in the Indian Ocean, North Atlantic Ocean, North Pacific Ocean, South Atlantic Ocean, South Pacific Ocean, and Southern Ocean from 1973-12-01 to 2013-12-31. These data include biogenic silica concentration, depth, particulate inorganic Carbon, and particulate organic Carbon (POC). The instruments used to collect these data include Multiple Unit Large Volume Filtration System. These data were collected by Frank J. Pavia and Sijia Dong of California Institute of Technology, Phoebe J. Lam of University of California-Santa Cruz, and Adam V. Subhas of Woods Hole Oceanographic Institution as part of the "Biogenic Calcium Carbonate Solubilities and Reaction Rates by Lab and Field Saturometry (Calcite Saturometer)" project. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2022-11-28.

The following is the text of the dataset description provided by BCO-DMO:

Compiled Global Dataset of PIC/POC and bSi Concentrations Measured by In Situ Pumps

Dataset Description:
Acquisition Description:
The data in this compilation come from three existing datasets already on BCO-DMO:
(1) The Compilation of MULVFS size-fractionated POC, PIC, and bSi data ( https://www.bco-dmo.org/dataset/884057 ; https://doi.org/10.26008/1912/bco-dmo.884057.1),
(2) GEOTRACES GP16 Particle Composition ( https://www.bco-dmo.org/dataset/668083 ; https://doi.org/10.1575/1912/bco-dmo.668083.1), and
(3) GEOTRACES GA03 Particulate Composition ( https://www.bco-dmo.org/dataset/3871 ; https://doi.org/10.1575/1912/bco-dmo.3871.5.1).

The collection and measurement methodologies for each of these datasets are described in detail on their respective BCO-DMO dataset landing pages.

For this dataset, we merged the Multiple Unit Large Volume in-situ Filtration System (MULVFS, Bishop et al. 1985) LVP PIC, POC, and bSi dataset published partially in Lam et al. 2011 with new data collected using McLane in-situ pumps equipped with two size-fractionating filters during the GEOTRACES program. The filter sizes generally consist of a 51 micrometer (μm) or 53μm pre-filter that collects large particles, followed by a 0.8μm or 1μm filter that collects smaller particles. We annotate large size fraction particles (>53μm or >51μm) as "LSF", and small size fraction particles (1-53μm or 0.8-51μm) denoted "SSF" (small size fraction).