Dataset: GN01 Po-Pb Small Particles
Deployment: HLY1502

GN01 Po-Pb Small Particles

Principal Investigator:

Kanchan Maiti (Louisiana State University, LSU)

Co-Principal Investigator:

Wokil Bam (Louisiana State University, LSU)

BCO-DMO Data Manager:

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

Project:

GEOTRACES Arctic Section: Disequilibria between Radium-226, Lead-210 and Polonium-210 in the Arctic Ocean and their implications for trace metal distribution (GEOTRACES Arctic Trace Metal Disequilibria)

U.S. Arctic GEOTRACES Study (GN01) (U.S. GEOTRACES Arctic)

Current State:

Final no updates expected

Deployment Synonyms:

GN01, U.S. GEOTRACES Arctic, 32H120150809

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/808509/data

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Description

This dataset includes small particulate Polonium 210 and Lead 210 measurements from the Western Arctic Ocean, which were sampled as part of the 2015 US GEOTRACES Cruise (GN01; HLY1502). These data have been published in Bam et al., 2020.

Methods & Sampling

Dataset acquisition description

Both the sample collection and analytical methods were done following the GEOTRACES Cookbook (Cutter et al., 2017).

Particulate Po-210 and Pb-210 was collected using large volume McLane pumps. Samples were collected on two different filter sizes, small particles (1- 51 µm) and large particles (>51 µm) filtering 500-800 L seawater. This dataset contains data on the small particles.

Analytical procedures were performed at Louisiana State University, following the protocol described in GEOTRACES Cookbook, Flynn (1968) and Fleer and Bacon (1984). The counting for Po-210 was done using Canberra Alpha Analyst high-resolution silicon-surface barrier (PIPS). The counting error was less than 10% for all the samples including the tracer.

Data Processing Description

Dataset Processing Description

Data Processing: Followed Baskaran et al (2013) and Riguad et al. (2013) for the data calculation.

Data were flagged using the SeaDataNet quality flag scheme. For more information on SeaDataNet flags, see: https://www.geotraces.org/geotraces-quality-flag-policy/ and https://www.seadatanet.org/Standards/Data-Quality-Control

SeaDataNet quality flag definitions:
0 = No quality control;
1 = Good value;
2 = Probably good value;
3 = Probably bad value;
4 = Bad value;
5 = Changed value;
6 = Value below detection;
7 = Value in excess;
8 = Interpolated value;
9 = Missing value;
A = Value phenomenon uncertain.

More information about this dataset deployment

Funding

Award Number	Funding Source
OPP-1435376	NSF Office of Polar Programs (formerly NSF PLR)

Instruments

McLane Pump

Supplied Name: large volume McLane pumps

Supplied Description:

Instrument Type

Generic Name: McLane Pump

Generic Description:

McLane pumps sample large volumes of seawater at depth. They are attached to a wire and lowered to different depths in the ocean. As the water is pumped through the filter, particles suspended in the ocean are collected on the filters. The pumps are then retrieved and the contents of the filters are analyzed in a lab.

Spectrometer

Supplied Name: Alpha Spectroscopy Passivated Implanted Planar Silicon (PIPS) detector

Supplied Description:

Canberra Alpha Analyst high-resolution 142 silicon-surface barrier (PIPS)

Instrument Type

Generic Name: Spectrometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0460/

Generic Description:

A spectrometer is an optical instrument used to measure properties of light over a specific portion of the electromagnetic spectrum.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Station_ID	Station identifier	unitless	station
Start_Date_UTC	Date (UTC) at start of sampling; format: yyyy-mm-dd	unitless	date
Start_Time_UTC	Time (UTC) at start of sampling; format: HH:MM	unitless	time
End_Date_UTC	Date (UTC) at end of sampling; format: yyyy-mm-dd	unitless	date
End_Time_UTC	Time (UTC) at end of sampling; format: HH:MM	unitless	time
Start_Latitude	Latitude at start of sampling	degrees North	lat
Start_Longitude	Longitude at start of sampling	degrees East	lon
End_Latitude	Latitude at end of sampling	degrees North	lat
End_Longitude	Longitude at end of sampling	degrees East	lon
Event_ID	GEOTRACES event number	unitless	event
Sample_ID	GEOTRACES sample number	unitless	sample
Sample_Depth	Sample depth	meters (m)	depth
Pb_210_SPT_CONC_PUMP_cbmm3u	Concentration (or activity) of 210Pb in small particles	mBq/kg	trace_element_conc
SD1_Pb_210_SPT_CONC_PUMP_cbmm3u	One standard deviation for Pb_210_SPT_CONC_PUMP_cbmm3u	mBq/kg	trace_element_conc
Flag_Pb_210_SPT_CONC_PUMP_cbmm3u	Quality flag for Pb_210_SPT_CONC_PUMP_cbmm3u	None	q_flag
Po_210_SPT_CONC_PUMP_5c1vo9	Concentration (or activity) of 210Po in small particles	mBq/kg	trace_element_conc
SD1_Po_210_SPT_CONC_PUMP_5c1vo9	One standard deviation for Po_210_SPT_CONC_PUMP_5c1vo9	mBq/kg	trace_element_conc
Flag_Po_210_SPT_CONC_PUMP_5c1vo9	Quality flag for Po_210_SPT_CONC_PUMP_5c1vo9	None	q_flag
Start_ISO_DateTime_UTC	Date and time (UTC) at start of sampling formatted to ISO 8601 standard; format: yyyy-mm-ddT:HH:MMZ	unitless	ISO_DateTime_UTC
End_ISO_DateTime_UTC	Date and time (UTC) at end of sampling formatted to ISO 8601 standard; format: yyyy-mm-ddT:HH:MMZ	unitless	ISO_DateTime_UTC

Database

Contribute Data

Dataset: GN01 Po-Pb Small Particles
Deployment: HLY1502

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: GN01 Po-Pb Small ParticlesDeployment: HLY1502

Dataset acquisition description

Dataset Processing Description

Dataset: GN01 Po-Pb Small Particles
Deployment: HLY1502