Dataset: thor
Deployment: TT012

Thorium-234 activity in particulate and dissolved phases

Principal Investigator:

J. Kirk Cochran (Stony Brook University, SUNY Stony Brook)

BCO-DMO Data Manager:

Cynthia L. Chandler (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

U.S. JGOFS Equatorial Pacific (EqPac)

Version:

May, 1996

Deployment Synonyms:

EqPac Fall Time Series

Version Date:

1996-05-15

Data URL:

https://www.bco-dmo.org/dataset-deployment/450947/data

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Description

Thorium-234 activity in particulate and dissolved phases

Methods & Sampling

Dataset acquisition description

See Platform deployments for cruise specific documentation

Deployment-specific acquisition description

   PI:              James Kirk Cochran
   of:              State University of New York, Stony Brook
   dataset:         Thorium-234 activity in particulate and dissolved phases
   dates:           September 26, 1992 to October 21, 1992
   location:        N: 0.0217  S: -11.9897  W: -145.403  E: -139.965
   project/cruise:  EQPAC/TT012 - Fall Time Series
   ship:            Thomas Thompson
 
   PI-NOTES
 
   Date: Wed, 29 May 1996 
   From: James K Cochran 
 
   "0.5 micron cartridge PF" refers to particulate Th-234 retained
   on a 0.5 micrometer-equivalent pore size wound polypropylene fiber
   cartridge.  These cartridges were used throughout this work.

   The most appropriate reference to methodology is: 

   Buesseler, K.O., J.K. Cochran, M.P. Bacon, H.D. Livingston, S.A. Casso,
   D. Hirschberg, M.C. Hartman and A.P. Fleer (1992).  Determination of
   thorium isotopes in seawater by non-destructive and radiochemical
   procedures.  Deep-Sea Res. 39, 1103-1114.

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

Instruments

GO-FLO Bottle

Supplied Name: Go-flo Bottle

Supplied Description:

30-l Go-Flo bottles used to collect seawater.

Instrument Type

Generic Name: GO-FLO Bottle

Acronym: GO-FLO

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/30/

Generic Description:

GO-FLO bottle cast used to collect water samples for pigment, nutrient, plankton, etc. The GO-FLO sampling bottle is specially designed to avoid sample contamination at the surface, internal spring contamination, loss of sample on deck (internal seals), and exchange of water from different depths.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
lat_n	nominal latitude with hemisphere label	whole degrees	lat_n
event	event number from event log		event
sta	station number from event log		sta
cast	pumping cast number from event log		cast
depth_n	nominal depth of wire out	meters	depth_n
Th234_p_d7to1	particulate Thorium-234 activity in the size fraction between 0.7 and 1 microns	dpm (disintegrations per minute)/liter	Th234_p_d7to1
err_Th234_p_d7to1	error of particulate Thorium-234 analysis in size fraction between 0.7 to 1 microns	+/- dpm/liter	Th234_p_d7to1_err
Th234_p_1to53	particulate Thorium-234 activity in the size fraction between 1 and 53 microns	dpm/liter	Th234_p_1to53
err_Th234_p_1to53	error of particulate Thorium-234 analysis in size fraction between 1 and 53 microns	+/- dpm/liter	Th234_p_1to53_err
Th234_p_gt_53	particulate Thorium-234 activity in the size fraction greater than 53 microns	dpm/liter	Th234_p_gt_53
err_Th234_p_gt_53	error of particulate Thorium-234 analysis in size fraction greater than 53 microns	+/- dpm/liter	Th234_p_gt_53_err
Th234_p_tot	total particulate Thorium-234 activity from all size fractions	dpm/liter	Th234_p_tot
err_Th234_p_tot	error total particulate Thorium-234 analyses from all size fractions	+/- dpm/liter	Th234_p_tot_err
Th234_d_tot	total dissolved Thorium-234 activity from all size fractions	dpm/liter	Th234_d_tot
err_Th234_d_tot	error total dissolved Thorium-234 activity from all size fractions	+/- dpm/liter	Th234_d_tot_err
Th234_p_d_tot	total Thorium-234 activity in both particulate and dissolved phases	dpm/liter	Th234_p_d_tot
err_Th234_p_d_tot	error total Thorium-234 activity in both particulate and dissolved phases	+/- dpm/liter	Th234_p_d_tot_err
comment	indication of where 0.5 micron polypropylene fiber cartridge filter was used. See PI-NOTES.		comment

Database

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Dataset: thor
Deployment: TT012

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: thorDeployment: TT012

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Dataset: thor
Deployment: TT012