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

Name: Compiled global dataset of PIC/POC and bSi concentrations measured by in situ pumps on multiple research cruises conducted from between 1973 and 2013
Published: 2022-11-18
Keywords: in situ pump, particulate carbon, biogenic carbon, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.883965.1

Spatial Extent: N:50 E:-9.66 S:-66.4 W:-172

Temporal Extent: 1973-12 - 2013-12

Project:

Biogenic Calcium Carbonate Solubilities and Reaction Rates by Lab and Field Saturometry (Calcite Saturometer)

Principal Investigator:

Frank J. Pavia (California Institute of Technology, Caltech)

Co-Principal Investigator:

Sijia Dong (California Institute of Technology, Caltech)

Phoebe J. Lam (University of California-Santa Cruz, UCSC)

Adam V. Subhas (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2022-11-18

Restricted:

Validated:

Yes

Current State:

Final no updates expected

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

Abstract:

This dataset is a compiled global dataset of inorganic and organic carbon and biogenic silica concentrations measured by in situ pumps. 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).

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Archival Copy

Version Date	Archive	Persistent Identifier	Date PID Issued
2022-11-18	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.883965.1	2022-11-28

Methods & Sampling

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; DOI: 10.26008/1912/bco-dmo.884057.1),
(2) GEOTRACES GP16 Particle Composition (https://www.bco-dmo.org/dataset/668083; DOI: 10.1575/1912/bco-dmo.668083.1), and
(3) GEOTRACES GA03 Particulate Composition (https://www.bco-dmo.org/dataset/3871; DOI: 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).

Data Processing Description

Data quality flags were assigned to values as follows:
0 = good quality - passed lab QC;
1 = unknown quality - oceanographically consistent, but no intercalibration possible;
4 = questionable quality - below detection limit or anomalously high or low;
8 = bad quality - failed lab QC, or known issue with sample.

Data Files

File
compiled_pic_poc_bsi.csv (Comma Separated Values (.csv), 177.31 KB) MD5:1e56c7ff88cf5aaa4bd5ee82506ee57e Primary data file for dataset ID 883965

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1923998

Deployments

None available yet

Instruments

Multiple Unit Large Volume Filtration System

Supplied Name: Multiple Unit Large Volume in-situ Filtration System

Supplied Description:

Instrument Type

Generic Name: Multiple Unit Large Volume Filtration System

Acronym: MULVFS

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/32/

Generic Description:

The Multiple Unit Large Volume Filtration System (MULVFS) was first described in Bishop et al., 1985 (doi: 10.1021/ba-1985-0209.ch009). The MULVFS consists of multiple (commonly 12) specialized particulate matter pumps, mounted in a frame and tethered to the ship by a cable (Bishop et al., 1985; Bishop and Wood, 2008). The MULVFS filters particulates from large volumes of seawater, although the exact protocols followed will vary for each project.

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	Cruise ID number if available; if not, a unique numeric cruiseID was created based on year and month of cruise. These correspond to the "cruiseID" column of related dataset 884057.	unitless	cruise_id
station_GEOTRC	GEOTRACES Station Number	unitless	station
Lon	longitude (negative values = West)	degrees East	lat
Lat	latitude (negative values = South)	degrees North	lon
depth_n	depth	meters	depth
month	month Format: %m	unitless	month
year	year Format: %Y	unitless	year
PICPOC_ssf	particulate inorganic carbon to particulate organic carbon in small size fraction	unitless	ratio
PICPOC_lsf	particulate inorganic carbon to particulate organic carbon in large size fraction	unitless	ratio
PICPOC_lsf_ssf	particulate inorganic carbon to particulate organic carbon, large size fraction over small size fraction	unitless	ratio
POC_ssf	small size particulate organic carbon concentration	micromoles per liter	POC
POC_ssf_flag	small size particulate organic carbon quality control flags, defined as: 0 = good quality - passed lab QC; 1 = unknown quality - oceanographically consistent, but no intercalibration possible; 4 = questionable quality - below detection limit or anomalously high or low; 8 = bad quality - failed lab QC, or known issue with sample.	unitless	q_flag
POC_lsf	large size particulate organic carbon flux	micromoles per liter	POC
POC_lsf_flag	large size particulate organic carbon quality control flags, defined as: 0 = good quality - passed lab QC; 1 = unknown quality - oceanographically consistent, but no intercalibration possible; 4 = questionable quality - below detection limit or anomalously high or low; 8 = bad quality - failed lab QC, or known issue with sample.	unitless	q_flag
PIC_ssf	small size particulate inorganic carbon concentration	micromoles per liter	PIC
PIC_ssf_flag	small size particulate inorganic carbon quality control flags, defined as: 0 = good quality - passed lab QC; 1 = unknown quality - oceanographically consistent, but no intercalibration possible; 4 = questionable quality - below detection limit or anomalously high or low; 8 = bad quality - failed lab QC, or known issue with sample.	unitless	q_flag
PIC_lsf	large size particulate inorganic carbon flux	micromoles per liter	PIC
PIC_lsf_flag	large size particulate inorganic carbon quality control flags, defined as: 0 = good quality - passed lab QC; 1 = unknown quality - oceanographically consistent, but no intercalibration possible; 4 = questionable quality - below detection limit or anomalously high or low; 8 = bad quality - failed lab QC, or known issue with sample.	unitless	q_flag
bSi_ssf	small size biogenic silica concentration	micromoles per liter	Si_bio
bSi_ssf_flag	small size biogenic silica fquality control flags, defined as: 0 = good quality - passed lab QC; 1 = unknown quality - oceanographically consistent, but no intercalibration possible; 4 = questionable quality - below detection limit or anomalously high or low; 8 = bad quality - failed lab QC, or known issue with sample.	unitless	q_flag
bSi_lsf	large size biogenic silica flux	micromoles per liter	Si_bio
bSi_lsf_flag	large size biogenic silica quality control flags, defined as: 0 = good quality - passed lab QC; 1 = unknown quality - oceanographically consistent, but no intercalibration possible; 4 = questionable quality - below detection limit or anomalously high or low; 8 = bad quality - failed lab QC, or known issue with sample.	unitless	q_flag

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Database

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