Dataset: FNPP_F1_sed_trap

Name: Sediment trap flux data from two traps deployed from R/V MIRAI at the F1 mooring site offshore from the Fukushima Nuclear Power Plant (FNPP), in the western North Pacific from 2011-2012 (Fukushima Sediment Radionuclides project)
Published: 2014-05-06
Keywords: oceans

Cite This Dataset

Spatial Extent: N:36.4417 E:141.475 S:36.4417 W:141.475

Project:

RAPID: Time Series Sampling for Radionuclide and Biogeochemical Fluxes at F1 Time-series Station, Offshore Fukushima Dai-ichi Nuclear Power Facility (Fukushima Sediment Radionuclides)

Principal Investigator:

Christopher R. German (Woods Hole Oceanographic Institution, WHOI)

Contact:

Steven Manganini (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

06 May 2014

Version Date:

2014-05-06

Validated:

Yes

Current State:

Preliminary and in progress

Sediment trap flux data from two traps deployed from R/V MIRAI at the F1 mooring site offshore from the Fukushima Nuclear Power Plant (FNPP), in the western North Pacific from 2011-2012 (Fukushima Sediment Radionuclides project)

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Description

Sediment trap flux data from two traps, at 500 m and 1000 m depth, deployed at the F1 mooring site offshore from the Fukushima Nuclear Power Plant (FNPP), 2011-2012.

Note (06 May 2014): Additional data from this sediment trap will be made available upon completion of futher analyses and manuscript publication.

Methods & Sampling

Time-series sampling (from 19-July-2011 to 08-May-2012; refer to data for sampling interval) was undertaken using a standard McLane PARFLUX Mk8 sediment trap. All data were generated in the WHOI PARFLUX laboratory following standard procedures (Eggiman et al., 1980; Honjo et al., 1995). Samples were processed through a 10-positon sample splitter and aliquots dried and weighed to obtain mass flux data. Further samples were then digested using standard methods to obtain concentrations per known mass of sample.

Data Processing Description

Sample concentrations (mass/mass) have been multiplied by mass flux results (mass/area/time) to obtain fluxes of different chemical species. Thus concentration of parameter X, is multiplied by mass flux (F-mass) to obtain flux of parameter X (F-X): F-X = F-mass x [X].

There is one area where processing has led to questionable derived results because [Ca] values were used, instead of direct analysis, to calculate % inorganic C contents. The offending cells are highlighted in red in the original Excel file at cell AN10 and cell AX10.

Data Files

File
F1_sed_trap.csv (Comma Separated Values (.csv), 1.64 KB) MD5:b783226130d2208d6d8d79a562659810 Primary data file for dataset ID 514188

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1139902

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
Fukushima_F1_mooring	F1 Mooring; Fukushima Dai-ichi Nuclear Power Plant	2011-07-18	F1 Mooring	Makio C Honda (Chief Scientist) Christopher R. German (Contact)	data info
MR11-05_Leg_2	MR11-05	2011-07-17	R/V MIRAI	Makio C Honda (Chief Scientist)	data info
MR12-02_Leg_2	MR12-02	2012-06-24	R/V MIRAI	Makio C Honda (Chief Scientist)	data info

Instruments

McLane PARFLUX Mark 8 Sediment Trap

Supplied Name: McLane PARFLUX Mark 8

Supplied Description:

Instrument Type

Generic Name: McLane PARFLUX Mark 8 Sediment Trap

Acronym: McLane PARFLUX Mark 8

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/33/

Generic Description:

The Mark 8 Sediment Trap is a time-series instrument that autonomously collects the flux of settling particles on an operator-defined schedule. The wide top funnel accumulates particulate specimens into individual sample bottles. The cone interior is natural polyethylene. Deploys from a stand-alone mooring or a large high-tension vertical array.

McLane Mark 8 Data Sheet (PDF)
McLane website: http://www.mclanelabs.com/master_page/product-type/samplers/sediment-traps

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
sample	Sample number.	integer	sample
date_open	Date the sample cup was opened.	mm/dd/yyyy	date_begin
sampling_period	Sampling interval (number of days open).	days	days_open
trap_depth	Depth of the sediment trap.	meters	depth_trap
site	Name of the site.	text	site
lat	Latitude of the sediment trap.	decimal degrees	lat
lon	Longitude of the sediment trap.	decimal degrees	lon

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Database

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Dataset: FNPP_F1_sed_trap