Dataset: thorium WB traps
Deployment: WB0508

Sediment trap flux data with Thorium-234

Principal Investigator:

Kenneth O. Buesseler (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

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

Project:

Eddies Dynamics, Mixing, Export, and Species composition (EDDIES)

Version:

11 July 2008

Deployment Synonyms:

EDT4 2005 Transect 2

Version Date:

2008-07-11

Data URL:

https://www.bco-dmo.org/dataset-deployment/452725/data

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Description

 dates:           24 June 2004 to 25 August 2005  (20040624-20050825)            
 location:        N: 31.761  S: 29.779  W: -69.410  E: -64.082 
 project/cruise:  EDDIES/WB0409 2004 Transect 1 (EDT1)
                  EDDIES/WB0413 2004 Transect 2 (EDT2)
                  EDDIES/WB0506 2005 Transect 1 (EDT3)
                  EDDIES/WB0508 2005 Transect 2 (EDT4)
 platform:        R/V Weatherbird II


 Methodology: see PI-NOTES file

    also see Chapter 20: Sediment Traps in U.S. JGOFS BATS Method Manual
    Version 4 (1997).  Bermuda Atlantic Time-Series Study April 1997.
    Anthony H. Knap, Anthony F. Michaels et al., 136 pp.
    (link to BATS Method Manual version 4 local copy)
    Methods also detailed in Buesseler et al., DSRII 2008: 
        Buesseler, K.O., C. Lamborg, P. Cai, R. Escoube, R. Johnson, S. Pike, 
        P. Masque, D. McGillicuddy and E. Verdeny (2008). Particle fluxes associated
    with mesoscale eddies in the Sargasso Sea. Deep-Sea Research II, 55: 1426-1444.

 Change history: YYMMDD
    080703: received original data from K. Buesseler;
    080728: data prepared by Nancy copley (WHOI);
    090806: added to OCB database by Cyndy Chandler, OCB DMO;

 PI notes:  Mass flux for EDT1 arrays A&B have been estimated from the
            weight of the bolus since these samples were compromised
            following a drying oven problem. Estimate was calculated
            by assuming 89% of total mass transfer to bolus.

            Sediment trap position data is available separately.
            Both traps were within the eddy; trap locations shown in Figure 1 of 
            Buesseler et al. DSRII 2008 (see above)

Methods & Sampling

Dataset acquisition description

VERTEX style sediment traps (Knauer et al. 1979; Martin et al. 1987) were deployed during EDDIES to directly capture sinking particles for flux analyses.

Knauer, G. A., J. H. Martin, and K. W. Bruland. 1979. Fluxes of particulate carbon, nitrogen, and phosphorous in the upper water column of the northeast Pacific. Deep-Sea Research A 26: 97-108.

Martin, J. H., G. A. Knauer, D. M. Karl, and W. W. Broenkow. 1987. VERTEX: carbon cycling in the northeast Pacific. Deep-Sea Research A 34: 267-285.

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-0241310	NSF Division of Ocean Sciences

Instruments

Sediment Trap

Supplied Description:

VERTEX style sediment traps (Knauer et al. 1979; Martin et al. 1987)

Instrument Type

Generic Name: Sediment Trap

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/33/

Generic Description:

Sediment traps are specially designed containers deployed in the water column for periods of time to collect particles from the water column falling toward the sea floor. In general a sediment trap has a jar at the bottom to collect the sample and a broad funnel-shaped opening at the top with baffles to keep out very large objects and help prevent the funnel from clogging. This designation is used when the specific type of sediment trap was not specified by the contributing investigator.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Cruise_ID	cruise designation; name	dimensionless	cruise_id
staName	name of station	dimensionless	sta_name
depth_n	nominal depth of sample	meters	depth_n
Th234	thorium-234	dpm/liter	Th234_tot
Th234_err	thorium-234, propagated net error	dpm/liter	no_bcodmo_term
array_name	sediment trap array name	dimensionless	no_bcodmo_term
location	replicate trap arrays A & B	dimensionless	no_bcodmo_term
duration	duration of trap deployment	days	no_bcodmo_term
flux_mass	Mass flux	mg/m^2/day	no_bcodmo_term
filter_ID	filter ID	dimensionless	no_bcodmo_term
flux_Corg	organic Carbon flux	mg/m^2/day	no_bcodmo_term
flux_N	Nitrogen flux	mg/m^2/day	no_bcodmo_term

Database

Contribute Data

Dataset: thorium WB traps
Deployment: WB0508

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: thorium WB trapsDeployment: WB0508

Dataset acquisition description

Dataset Processing Description

Dataset: thorium WB traps
Deployment: WB0508