Dataset: GT10-11 - Particulate Po Pb
Deployment: KN199-04

Particulate 210Po and 210Pb from US GEOTRACES North Atlantic KN199-04 and KN204-01

Principal Investigator:

Mark Baskaran (Wayne State University, WSU)

Co-Principal Investigator:

Thomas M. Church (University of Delaware)

Gillian Stewart (Queens College, CUNY QC)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

U.S. GEOTRACES North Atlantic Transect (GA03) (U.S. GEOTRACES NAT)

Current State:

Final no updates expected

Deployment Synonyms:

GA03, GT10, USGT-NAT-2010, KN199-4, GNAT, U.S. GEOTRACES NAZT Leg 1, knorr199-4/5, Section Cruise (GA03), 316N20101015

Version Date:

2013-06-14

Data URL:

https://www.bco-dmo.org/dataset-deployment/455941/data

Expand/Collapse All

Description

Version changes:
Version 14June2013: The depth for KN204-01 pump samples was updated from target (nominal) depths to depths based on the final, corrected, and most accurate pump depth. The KN199-04 depths remain as the target (nominal) depths. See the particle composition dataset (https://www.bco-dmo.org/dataset/3871) in the Sampling section for further details.

Methods & Sampling

Dataset acquisition description

Currently the recommended assay of both dissolved and particulate seawater samples are outlined in GEOTRACES procedures manual at:
http://www.obs-vlfr.fr/GEOTRACES/science/intercalibration/222-sampling-and-sample-handling-protocols-for-geotraces-cruises
It is also published in Baskaran, et al. (2013).

Data Processing Description

Dataset Processing Description

The calculated activities were corrected for in-growth, decay, chemical recoveries, filter and reagent blanks and detector background (all details are outlined by Baskaran et al. (2013) given above).

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-0961351	NSF Division of Ocean Sciences

Instruments

CTD Sea-Bird

Supplied Description:

A self-recording Seabird 19plus CTD, deployed at the end of the line for both cruises.

Instrument Type

Generic Name: CTD Sea-Bird

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/130/

Generic Description:

Conductivity, Temperature, Depth (CTD) sensor package from SeaBird Electronics, no specific unit identified. This instrument designation is used when specific make and model are not known. See also other SeaBird instruments listed under CTD. More information from Sea-Bird Electronics.

McLane Pump

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.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	Official cruise identifier e.g. KN199-04 = R/V Knorr cruise number 199-04	dimensionless	cruise_id
cruise_name	project designated cruise name	dimensionless	cruise_name
station_GEOTRC	GEOTRACES station number	dimensionless	station
depth	final depth of pump sample. For KN199-4: reported depth is the target depth from wire out. For KN204-1: reported depth is corrected depth using RBR data loggers.	meters	depth
cast_GEOTRC	Cast identifier numbered consecutively within a station. Values were added from the intermediate US GEOTRACES master file (see Processing Description).	dimensionless	cast
lat	latitude; North is positive	decimal degrees	lat
lon	longitude; East is positive	decimal degrees	lon
event_GEOTRC	Unique identifying number for US GEOTRACES sampling events; ranges from 2001 to 2225 for KN199-04 events and from 3001 to 3282 for KN204-01 events. Values were added from the intermediate US GEOTRACES master file (see Processing Description).	dimensionless	event
sample_GEOTRC	Unique identifying number for US GEOTRACES samples	dimensionless	sample
sample_bottle_GEOTRC	Unique identification numbers given to samples taken from bottles; ranges from 1 to 24; often used synonymously with bottle number. Values were added from the intermediate US GEOTRACES master file (see Processing Description).	dimensionless	sample
bottle_GEOTRC	Alphanumeric characters identifying bottle type (e.g. NIS representing Niskin and GF representing GOFLO) and position on a CTD rosette. Values were added from the intermediate US GEOTRACES master file (see Processing Description).	dimensionless	bottle
Po_210	particulate Polonium-210 activity	dpm (nuclear decays per minute)/100 kilgrams	trace_metal_conc
Po_210_sd	particulate Polonium-210 activity error	dpm/100 kilgrams	trace_metal_sd
Pb_210	particulate Lead-210 activity	dpm/100 kilgrams	trace_metal_conc
Pb_210_sd	particulate Lead-210 activity error	dpm/100 kilgrams	trace_metal_sd
Po_Pb_ratio	activity ratio of Polonium to Lead	dimensionless	no_bcodmo_term
Po_Pb_ratio_sd	activity ratio of Polonium to Lead error	dimensionless	no_bcodmo_term
BTL_ISO_DateTime_UTC	Date and time (UTC) variable recorded at the bottle sampling time in ISO compliant format. Values were added from the intermediate US GEOTRACES master file (see Processing Description). This standard is based on ISO 8601:2004(E) and takes on the following form: 2009-08-30T14:05:00[.xx]Z (UTC time)	yyyy-MM-dd'T'HH:mm:ss.SS'Z'	ISO_DateTime_UTC
instr	instrument used for sample collection: McL-Prof = McLane Profiler; 30-ODF = Ocean Data Facility 12 bottle 30 liter Niskin rosette.	unitless	instrument

Database

Contribute Data

Dataset: GT10-11 - Particulate Po Pb
Deployment: KN199-04

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: GT10-11 - Particulate Po PbDeployment: KN199-04

Dataset acquisition description

Dataset Processing Description

Dataset: GT10-11 - Particulate Po Pb
Deployment: KN199-04