thorium_B_WB

Dataset description

Total Thorium-234 and Uranium-238 from Niskin bottle samples taken on all EDDIES WB cruises

 dates:           24 June 2004 to 25 August 2004  (20040624-20050825) 
 location:        N: 31.928  S: 29.779  W: -69.410  E: -64.082 
 project/cruise:  EDDIES/WB0409 2004 Transect 1 (EDT1 or E1)
                  EDDIES/WB0413 2004 Transect 2 (EDT2 or E2)
                  EDDIES/WB0506 2005 Transect 1 (EDT3 or E3)
                  EDDIES/WB0508 2005 Transect 2 (EDT4 or E4)
 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: Thorium-234 data reported in units of dpm/l filtered, 
    with propagated error as % and as +/- error on a dpm/L basis; 
    Uranium-238 reported in units of dpm/L as calculated from salinity from 
    Chen et al., 1986 (*) and described in Buesseler et al., 2008
    CTD locations shown in Figure 1 of Buesseler et al. DSDRII 2008
    (*) Chen, J.H., Edwards, R.L., Wasserburg, G.J., 1986. 238U, 234U and 232Th
        in seawater. Earth and Planetary Science Letters 80, 241-251.
 
Acquisition description
Processing description


Field Names List
 

Parameter
Description
Units
Cruise_ID
cruise designation; name
dimensionless
sta
station number
dimensionless
year_dec
decimal year
dimensionless
yrday
day of year sampling began (GMT)
dimensionless
lat
latitude, negative denotes South
decimal degrees
lon
longitude, negative denotes West
decimal degrees
date
date sampling began (UTC)
YYYYMMDD
time
start time sampling began (GMT)
hhmm
press
pressure; from CTD
dimensionless
depth_n
nominal depth of sample
meters
234Th
thorium-234
dpm/liter
234Th_err
thorium-234, propagated net error
dpm/liter
U238
uranium-238
dpm/liter
depth
depth calculated from pressure
meters
Nis_WB
Niskin bottle order number, Weatherbird
dimensionless
QF
integer quality flag indicator
dimensionless
SID_234Th
sample ID; Thorium-234
dimensionless
234Th_err_pct
Thorium-234 propagated error as percent
percent

Platforms List
R/V Weatherbird II WB0409
	
R/V Weatherbird II WB0413
	
R/V Weatherbird II WB0506
	
R/V Weatherbird II WB0508
	

Instruments List

Niskin Bottle :



This document is created from the content of the BCO-DMO metadata database.    2009-11-22  09:41:11
info app: /home/ocb/dbase  v.090827 CLC 
Data URL: http://ocb.whoi.edu/jg/serv/OCB/EDDIES/multi-ship/thorium_B_WB.