thorium

Data Object Thorium-234

contact PIs:

name	title
Dr Ken O. Buesseler	Principal Investigator

Dataset description

Thorium 234, POC and biogenic silica from the 2002 SOFeX project South Patch experiment


 dates:           29 January 2002 to 20 February 2002  (20020129-20020220) 
 location:        N: -65.25  S: -66.91  W: -172.99  E: -170.60 
 project/cruise:  SOFeX/MV and SOFeX/PS
 platform:        SOFeX multi-ship: R/V Melville and USCGC Polar Star
 
 
 Methodology: Buesseler, et al. 2005

    "Particle export during the Southern Ocean Iron Experiment (SOFeX)". Limnol. 
    Oceanogr., 50(1). American Society of Limnology and Oceanography, Inc. pp.311-327. 
 
 Change history: YYMMDD 
    070323: data contributed by Ken Buesseler as emailed PDF file
    070418: added to OCB database by Cyndy Chandler, OCB DMO, (cchandler@whoi.edu) 
 
 PI note: POC blank greater than 75% for 50-100 m in patch POC_gt54 observations
    on 9 and 11 February 2002

In the data set, bd indicates observed value is 'below detection'.

Acquisition description

 Methodology: Buesseler, et al. 2005

    "Particle export during the Southern Ocean Iron Experiment (SOFeX)". Limnol. 
    Oceanogr., 50(1). American Society of Limnology and Oceanography, Inc. pp.311-327. 
 
 PI note: POC blank greater than 75% for 50-100 m in patch POC_gt54 observations
    on 9 and 11 February 2002

In the data set, bd indicates observed value is 'below detection'.

Processing description

 Change history: YYMMDD 
    070323: data contributed by Ken Buesseler as emailed PDF file
    070418: added to OCB database by Cyndy Chandler, OCB DMO, (cchandler@whoi.edu)

Field Names List

Parameter	Description	Units
patch_loc	sampling location relative to patch	dimensionless
depth_r	depth range	dimensionless
lat	latitude, negative denotes South	decimal degrees
lon	longitude, negative denotes West	decimal degrees
date	date sampling began (UTC)	YYYYMMDD
time	time sampling began (UTC)	hhmm
depth	depth of sample	meters
Th234_gt54	Thorium 234 greater than 54 micro m	dpm per liter
Th_gt54_err	Thorium 234 gt54 error	dpm per liter
Th234_lt54	Thorium 234 less than 54 micro m	dpm per liter
Th234_lt54_err	Thorium 234 lt54 error	dpm per liter
POC_gt54	POC greater than 54 micro m	micromolar
POC_gt54_err	POC gt 54 error	micromolar
POC_lt54	POC less than 54 micro m	micromolar
C_to_N	carbon to nitrogen ratio gt 54 um	molar
POC_Th_gt54	POC to Thorium ratio gt 54 um	micromol per dpm
POC_Th_gt54_err	POC to Thorium ratio gt 54 um, error	micromol per dpm
POC_Th_lt54	POC to Thorium ratio lt 54 um	micromol per dpm
bSiO2_gt54	biogenic silica greater than 54 um	micromolar
bSiO2_Th	biogenic silica to Thorium ratio greater than 54 micro m	micromol per dpm

Platforms List

R/V Melville COOK19MV

USCGC Polar Star PS02_2002

This document is created from the content of the BCO-DMO metadata database. 2009-11-22 09:23:08

info app: /home/ocb/dbase v.090827 CLC
Data URL: http://ocb.whoi.edu/jg/serv/OCB/SOFeX/multi-ship/thorium.