Dataset: thorium WB pumps
Deployment: WB0508

Large volume pump particulate data: 234Th, POC, PON, Si

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:

14 July 2008

Deployment Synonyms:

EDT4 2005 Transect 2

Version Date:

2008-07-14

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/452721/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;  
 
 Analysis Note: Data collected using McLane style in-situ battery powered pumps;
    Thorium-234 data reported in units of dpm/l filtered, with propagated error
    as % and as +/- error on a dpm/L basis; Samples passed through 142mm diameter
    53 micron screen followed by 1 micron nominal pore size quartz filter. 
    Summary of pump cast data, position and closest CTD in space and time in
    Table 2 of Buesseler et al. DSRII 2008

Methods & Sampling

Dataset acquisition description

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

McLane Large Volume Pumping System WTS-LV

Supplied Name: Large Volume Pumping System

Supplied Description:

Instrument Type

Generic Name: McLane Large Volume Pumping System WTS-LV

Acronym: WTS-LV

Generic Description:

The WTS-LV is a Water Transfer System (WTS) Large Volume (LV) pumping instrument designed and manufactured by McLane Research Labs (Falmouth, MA, USA). It is a large-volume, single-event sampler that collects suspended and dissolved particulate samples in situ.

Ambient water is drawn through a modular filter holder onto a 142-millimeter (mm) membrane without passing through the pump. The standard two-tier filter holder provides prefiltering and size fractioning. Collection targets include chlorophyll maximum, particulate trace metals, and phytoplankton. It features different flow rates and filter porosity to support a range of specimen collection. Sampling can be programmed to start at a scheduled time or begin with a countdown delay. It also features a dynamic pump speed algorithm that adjusts flow to protect the sample as material accumulates on the filter. Several pump options range from 0.5 to 30 liters per minute, with a max volume of 2,500 to 36,000 liters depending on the pump and battery pack used. The standard model is depth rated to 5,500 meters, with a deeper 7,000-meter option available. The operating temperature is -4 to 35 degrees Celsius.

The WTS-LV is available in four different configurations: Standard, Upright, Bore Hole, and Dual Filter Sampler. The high-capacity upright WTS-LV model provides three times the battery life of the standard model. The Bore-Hole WTS-LV is designed to fit through a narrow opening such as a 30-centimeter borehole. The dual filter WTS-LV features two vertical intake 142 mm filter holders to allow simultaneous filtering using two different porosities.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Cruise_ID	cruise designation; name	dimensionless	cruise_id
cast	pump cast number	dimensionless	cast
lat	latitude, negative denotes South	decimal degrees	lat
lon	longitude, negative denotes West	decimal degrees	lon
vol_sample	sample volume	milliliters	no_bcodmo_term
POC_uM	particulate organic carbon	micromoles/liter	POC_JG
SiO4_uM	Silicate	micromoles/liter	SiO4
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
PON_uM	particulate organic nitrogen	micromoles/liter	PON_JG
filter_pore	filter pore size, either 1 or 54	microns	no_bcodmo_term
Th234_err_pct	Thorium-234 propagated error as percent	percent	no_bcodmo_term

Database

Contribute Data

Dataset: thorium WB pumps
Deployment: WB0508

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: thorium WB pumpsDeployment: WB0508

Dataset acquisition description

Dataset Processing Description

Dataset: thorium WB pumps
Deployment: WB0508