Dataset: Thorium-234

Name: Thorium 234, POC and biogenic silica from R/V Melville, USCGC Polar Star cruises COOK19MV, PS02_2002 from the Southern Ocean, south of New Zealand in 2002 (SOFeX project)
Published: 2007-04-18
Keywords: oceans

Cite This Dataset

Spatial Extent: N:-65.25 E:-170.6 S:-66.91 W:-172.99

Project:

Southern Ocean Iron Experiment (SOFeX)

Program:

Ocean Carbon and Biogeochemistry (OCB)

Iron Synthesis (FeSynth)

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:

18 April 2007

Version Date:

2007-04-18

Validated:

Yes

Current State:

Final no updates expected

Thorium 234, POC and biogenic silica from R/V Melville, USCGC Polar Star cruises COOK19MV, PS02_2002 from the Southern Ocean, south of New Zealand in 2002 (SOFeX project)

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2007-04-18	National Oceanographic Data Center (NODC)	0086464	2012-03-12

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'.

Methods & Sampling

 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'.

Data 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)

Data Files

File
thorium.csv (Comma Separated Values (.csv), 4.67 KB) MD5:2e5277d02f77a20937cf09c07c2f7b27 Primary data file for dataset ID 2927

More Information about this dataset

Funding Sources

None available yet

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
COOK19MV	SOFeX MV	2002-01-19	R/V Melville	Kenneth H. Coale (Chief Scientist)	data info
PS02_2002	PS_2002_SOFeX	2002-02-11	USCGC Polar Star	Kenneth O. Buesseler (Chief Scientist)	data info

Instruments

None available yet

Parameters

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

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

Status message

Database

Contribute Data

Dataset: Thorium-234

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