Dataset: Surface Towfish Dissolved Trace Metal (Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb) Concentrations
Deployment: RR1813

Surface Towfish Dissolved Trace Metal (Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb) Concentrations

View Data: For data, See Dataset Metadata Page: https://www.bco-dmo.org/dataset/869683

Principal Investigator:

Kristen Nicolle Buck (University of South Florida, USF)

Co-Principal Investigator:

Mark A. Brzezinski (University of California-Santa Barbara, UCSB-MSI)

Bethany D. Jenkins (University of Rhode Island, URI)

Student:

Shannon M. Burns (University of South Florida, USF)

Contact:

Kristen Nicolle Buck (Oregon State University, OSU)

BCO-DMO Data Manager:

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

Karen Soenen (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Collaborative Research: Diatoms, Food Webs and Carbon Export - Leveraging NASA EXPORTS to Test the Role of Diatom Physiology in the Biological Carbon Pump (Diatoms and carbon export)

Version:

Deployment Synonyms:

EXPORTS

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Description

Methods & Sampling

Dataset acquisition description

Surface (~2 meters) water samples for dissolved trace metal concentrations were collected using a custom trace metal clean "towfish" sampling system (Mellett and Buck 2020) on the R/V Roger Revelle between 18 August and 6 September 2018 (during cruise RR1813). A total of 24 samples were filtered (<0.2 micrometers, Pall Acropak) inline, collected in acid-cleaned 125-milliliter low-density polyethylene (LDPE, Nalgene) bottles, and acidified to 0.024 M hydrochloric acid (HCl, Fisher Optima). Dissolved trace metal (Fe, Cu, Mn, Co, Ni, Cu, Zn, Cd, Pb) concentrations were determined by high-resolution inductively coupled plasma mass spectrometry (HR-ICP-MS) at the University of South Florida (Hollister et al. 2020).

Samples were collected at sea by Ph.D. student Travis Mellett (USF) and Dr. Salvatore Caprara (USF). Sample analyses for dissolved trace metals were performed by Shannon Burns (USF) with assistance from Dr. Salvatore Caprara (USF).

Data Processing Description

Dataset Processing Description

Data Processing:
Data processing was done with ESI SC version 2.9.0.380.

Data Quality Flags:
The standard Ocean Data View (ODV) / SeaDataNet qualifying flags were used (reference all flags at http://vocab.nerc.ac.uk/collection/L20/current/).

1: Good Value: Good quality data value that is not part of any identified malfunction and has been verified as consistent with real phenomena during the quality control process. [Used when replicates were in good agreement].
2: Probably Good Value: Data value that is probably consistent with real phenomena but this is unconfirmed. [Used when data is oceanographically consistent but no replicates.]
3: Probably Bad Value: Data value recognized as unusual during quality control that forms part of a feature that is probably inconsistent with real phenomena. [Used when data not oceanographically consistent but replicate analyses agreed.]
4: Bad Value: An obviously erroneous data value. [Used when replicates did not agree].
5: Changed Value: Data value adjusted during quality control. [Not used].
6: Value Below Detection Limit: The level of the measured phenomenon was too small to be quantified by the technique employed to measure it. Values are replaced with ‘nd’ for ‘not detectable’. [See Table 1 for detection limits.]
7: Value in Excess: The level of the measured phenomenon was too large to be quantified by the technique employed to measure it. The accompanying value is the measurement limit for the technique. [Not used].
8: Interpolated Value: This value has been derived by interpolation from other values in the data object. [Not used].
9: Missing Value: The data value is missing. Any accompanying value will be a magic number representing absent data. [Not used].
A: Value Phenomenon Uncertain: There is uncertainty in the description of the measured phenomenon associated with the value such as chemical species or biological entity. [Not used.]

Description of Table 1 (see Supplemental Files for the actual table): Average concentration ± standard deviation for relevant quality control samples (QCs), reference materials, and Milli-Q (MQ) blanks during dissolved trace metal analyses. A set of air blanks was run every seaFAST run. The limit of detection (LOD) for each dissolved element was calculated as 3 times the average SD of the air blanks. The QC surface seawater used was from the North Pacific (NP) EXPORTS cruise in August 2018. Reference materials (SAFe S, GSP) with consensus values were used. Consensus values for SAFe S and GSP are available on the GEOTRACES website (https://www.geotraces.org/standards-and-reference-materials/). *Dissolved Co and Cu concentrations are reported for UV-oxidized samples only. **Consensus values were converted to units of nM (Mn, Fe, Ni, Cu, and Zn) or pM (Co, Cd, and Pb) using average seawater density of 1.025 kg/L.

BCO-DMO Processing:
- converted DATE field to YYYY-MM-DD format;
- added the ISO_DateTime_UTC field.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1756433	NSF Division of Ocean Sciences
OCE-1756442	NSF Division of Ocean Sciences
OCE-1756816	NSF Division of Ocean Sciences

Instruments

Inductively Coupled Plasma Mass Spectrometer

Supplied Name: Element XR Inductively Coupled Plasma Mass Spectrophotometer

Supplied Description:

Instrument Type

Generic Name: Inductively Coupled Plasma Mass Spectrometer

Acronym: ICP Mass Spec

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB15/

Generic Description:

An ICP Mass Spec is an instrument that passes nebulized samples into an inductively-coupled gas plasma (8-10000 K) where they are atomized and ionized. Ions of specific mass-to-charge ratios are quantified in a quadrupole mass spectrometer.

SeaFAST Automated Preconcentration System

Supplied Name: SeaFAST pico

Supplied Description:

Instrument Type

Generic Name: SeaFAST Automated Preconcentration System

Generic Description:

The seaFAST is an automated sample introduction system for analysis of seawater and other high matrix samples for analyses by ICPMS (Inductively Coupled Plasma Mass Spectrometry).

towed unmanned submersible

Supplied Name: custom trace metal clean "towfish" sampling system

Supplied Description:

Instrument Type

Generic Name: towed unmanned submersible

Generic Description:

A vehicle towed by rigid cable through the water column at fixed or varying depth with no propulsion and no human operator (e.g. Towfish, Scanfish, UOR, SeaSoar).

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
DATE	UTC date when sample was pulled from the towfish, in format YYYY-MM-DD	unitless	date
TIME_LOCAL	Local time (Alaska Standard Time, GMT-9) of sampling, in format HH:MM	unitless	time
TIME_UTC	UTC time of sampling, in format HH:MM	unitless	time
JULIAN_DAY	Day of year sampled.	unitless	julian_day
ID	Sample ID, where TF stands for towfish.	unitless	sample
LATITUDE	Latitude in decimal degrees North (north is positive)	decimal degrees	lat
LONGITUDE	Longitude in decimal degrees East (west is negative)	decimal degrees	lon
Mn_D_CONC	Concentration of dissolved manganese (Mn)	nanomoles per liter (nM)	trace_metal_conc
Mn_D_CONC_Flag	Standard Ocean Data View qualifying flag for dissolved manganese concentration. (1 = Good Value, 2 = Probably Good Value, 3 = Probably Bad Value, 4 = Bad Value, 5 = Changed Value, 6 = Value Below Detection Limit, 7 = Value in Excess, 8 = Interpolated Value, 9 = Missing Value, A = Value Phenomenon Uncertain). See Processing Notes for full flag details.	unitless	flag
Fe_D_CONC	Concentration of total dissolved iron (Fe) in a sample. Values below the limit of detection [see Table 1 for LODs] are replaced with 'nd' for 'not detectable' and accompanied by Flag 6 in the dataset.	nanomoles per liter (nM)	trace_metal_conc
Fe_D_CONC_Flag	Standard Ocean Data View qualifying flag for dissolved iron concentration. (1 = Good Value, 2 = Probably Good Value, 3 = Probably Bad Value, 4 = Bad Value, 5 = Changed Value, 6 = Value Below Detection Limit, 7 = Value in Excess, 8 = Interpolated Value, 9 = Missing Value, A = Value Phenomenon Uncertain). See Processing Notes for full flag details.	unitless	flag
Co_D_CONC	Concentration of dissolved cobalt (Co)	picomoles per liter (pM)	trace_metal_conc
Co_D_CONC_flag	Standard Ocean Data View qualifying flag for dissolved cobalt concentration. (1 = Good Value, 2 = Probably Good Value, 3 = Probably Bad Value, 4 = Bad Value, 5 = Changed Value, 6 = Value Below Detection Limit, 7 = Value in Excess, 8 = Interpolated Value, 9 = Missing Value, A = Value Phenomenon Uncertain). See Processing Notes for full flag details.	unitless	flag
Ni_D_CONC	Concentration of dissolved nickel (Ni)	nanomoles per liter (nM)	trace_metal_conc
Ni_D_CONC_flag	Standard Ocean Data View qualifying flag for dissolved nickel concentration. (1 = Good Value, 2 = Probably Good Value, 3 = Probably Bad Value, 4 = Bad Value, 5 = Changed Value, 6 = Value Below Detection Limit, 7 = Value in Excess, 8 = Interpolated Value, 9 = Missing Value, A = Value Phenomenon Uncertain). See Processing Notes for full flag details.	unitless	flag
Cu_D_CONC	Concentration of dissolved copper (Cu)	nanomoles per liter (nM)	trace_metal_conc
Cu_D_CONC_flag	Standard Ocean Data View qualifying flag for dissolved copper concentration. (1 = Good Value, 2 = Probably Good Value, 3 = Probably Bad Value, 4 = Bad Value, 5 = Changed Value, 6 = Value Below Detection Limit, 7 = Value in Excess, 8 = Interpolated Value, 9 = Missing Value, A = Value Phenomenon Uncertain). See Processing Notes for full flag details.	unitless	flag
Zn_D_CONC	Concentration of dissolved zinc (Zn). Values below the limit of detection [see Table 1 for LODs] are replaced with 'nd' for 'not detectable' and accompanied by Flag 6 in the dataset.	nanomoles per liter (nM)	trace_metal_conc
Zn_D_CONC_flag	Standard Ocean Data View qualifying flag for dissolved zinc concentration. (1 = Good Value, 2 = Probably Good Value, 3 = Probably Bad Value, 4 = Bad Value, 5 = Changed Value, 6 = Value Below Detection Limit, 7 = Value in Excess, 8 = Interpolated Value, 9 = Missing Value, A = Value Phenomenon Uncertain). See Processing Notes for full flag details.	unitless	flag
Cd_D_CONC	Concentration of dissolved cadmium (Cd)	picomoles per liter (pM)	trace_metal_conc
Cd_D_CONC_flag	Standard Ocean Data View qualifying flag for dissolved cadmium concentration. (1 = Good Value, 2 = Probably Good Value, 3 = Probably Bad Value, 4 = Bad Value, 5 = Changed Value, 6 = Value Below Detection Limit, 7 = Value in Excess, 8 = Interpolated Value, 9 = Missing Value, A = Value Phenomenon Uncertain). See Processing Notes for full flag details.	unitless	flag
Pb_D_CONC	Concentration of dissolved lead (Pb)	picomoles per liter (pM)	trace_metal_conc
Pb_D_CONC_flag	Standard Ocean Data View qualifying flag for dissolved lead concentration. (1 = Good Value, 2 = Probably Good Value, 3 = Probably Bad Value, 4 = Bad Value, 5 = Changed Value, 6 = Value Below Detection Limit, 7 = Value in Excess, 8 = Interpolated Value, 9 = Missing Value, A = Value Phenomenon Uncertain). See Processing Notes for full flag details.	unitless	flag
ISO_DateTime_UTC	ISO 8601 notation of date and time of sampling, UTC timezone	unitless	ISO_DateTime_UTC

Database

Contribute Data

Dataset: Surface Towfish Dissolved Trace Metal (Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb) Concentrations
Deployment: RR1813

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Surface Towfish Dissolved Trace Metal (Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb) ConcentrationsDeployment: RR1813

Dataset acquisition description

Dataset Processing Description

Dataset: Surface Towfish Dissolved Trace Metal (Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb) Concentrations
Deployment: RR1813