Dataset: thorium WB pumps

Name: Large volume pump particulate data: 234Th, POC, PON, Si from R/V Weatherbird II WB0409, WB0413, WB0506, WB0508 cruises in the Sargasso Sea, 2004-2005 (EDDIES project)
Published: 2008-07-14
Keywords: oceans

Cite This Dataset

Spatial Extent: N:31.761 E:-64.082 S:29.779 W:-69.41

Project:

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

Program:

Ocean Carbon and Biogeochemistry (OCB)

Principal Investigator:

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

BCO-DMO Data Manager:

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

Version:

14 July 2008

Version Date:

2008-07-14

Validated:

Yes

Current State:

Final no updates expected

Large volume pump particulate data: 234Th, POC, PON, Si from R/V Weatherbird II WB0409, WB0413, WB0506, WB0508 cruises in the Sargasso Sea, 2004-2005 (EDDIES project)

Expand/Collapse All

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

Data Files

File
thorium_LV_WB.csv (Comma Separated Values (.csv), 18.01 KB) MD5:047e9c7c7c476541f5f788c32a3884d0 Primary data file for dataset ID 3178

More Information about this dataset

Funding Sources

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

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
WB0409	EDT1 2004 Transect 1	2004-06-23	R/V Weatherbird II	Nicholas Bates (Chief Scientist)	data info
WB0413	EDT2 2004 Transect 2	2004-08-02	R/V Weatherbird II	Nicholas Bates (Chief Scientist)	data info
WB0506	EDT3 2005 Transect 1	2005-07-06	R/V Weatherbird II	Nicholas Bates (Chief Scientist)	data info
WB0508	EDT4 2005 Transect 2	2005-08-17	R/V Weatherbird II	Nicholas Bates (Chief Scientist)	data info

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

Date and time formats are described in python strftime() syntax.

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

Status message

Database

Contribute Data

Dataset: thorium WB pumps