thorium_trap_WB

Dataset 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)

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.

Processing description

1. Sediment Trap:

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

This document is created from the content of the BCO-DMO metadata database.    2009-11-22  09:41:36