Dataset: SedimentTraps - Total PSi Flux
Deployment: 61TG_3052

Sediment Traps - Total PSi flux

Principal Investigator:

Scott Nodder (New Zealand National Institute of Water and Atmospheric Research, NIWA)

Dr Anya Waite (Centre for Water Research, University of Western Australia, CWR)

Contact:

Doug Mackie (University of Otago)

BCO-DMO Data Manager:

Stephen R. Gegg (Woods Hole Oceanographic Institution, WHOI)

Project:

Southern Ocean Iron Release Experiment (SOIREE)

Current State:

Final no updates expected

Version:

31August2009

Deployment Synonyms:

SOIREE

Version Date:

2009-08-31

Data URL:

https://www.bco-dmo.org/dataset-deployment/451429/data

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Description

SOIREE Sediment Traps - Total PSi flux

Methods & Sampling

Dataset acquisition description

See SOIREE Preliminary Voyage Report

METHOD:
Biogenic silica content was determined on mass flux samples after digestion in 0.2 M NaOH,
following the methods of Ragueneau and Tréguer (1994).

Estimated accuracy of replicate analyses: ±5-10%

Refer to Nodder & Waite in DSRII

Data Processing Description

Dataset Processing Description

See SOIREE Preliminary Voyage Report

BCO-DMO Processing Notes
Generated from original file SOIREE_Export_final.xls, Tab: TrapPSiFlux
provided on the Deep-Sea Research II 48 (2001) accompanying CD-Rom

BCO-DMO Edits
- parameter names modified to conform to BCO-DMO convention
- Blank rows in original sheet removed
- 'nd' added to blank cells
- Made column header record one line
- Dates, Times, Lat, Lons added from file: SOIREE_SedimentTraps_TrapDeploy.xls
- Deleted duplicate TotPSi column
- Silica dissolution estimates deleted from this sheet and made into separate dataset

More information about this dataset deployment

Instruments

Sediment Trap

Supplied Description:

MULTI-trap dimensions:

Length (L, m): 0.58 Trap length with baffles inserted;

L without baffles: 0.525 m

AR without baffles: 7.50

Trap volume without baffles: 2.021 litres

Inside diameter (Di, m): 0.07

Outside diameter (Do, m): 0.08

Aspect ratio (AR): 8.29

Aspect ratio with salt (AR): 7.29 Basal brine added to a height of 1-trap diameter (7 cm)

Collection area (A, m2): 0.00385

Trap volume (V, m3): 0.00223

Trap volume (V, litres): 2.232

Baffle length (Lb, m): 0.08

Baffle diameter (Dib, m): 0.01

Baffle aspect ratio (ARb): 5.77

Instrument Type

Generic Name: Sediment Trap

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

Generic Description:

Sediment traps are specially designed containers deployed in the water column for periods of time to collect particles from the water column falling toward the sea floor. In general a sediment trap has a jar at the bottom to collect the sample and a broad funnel-shaped opening at the top with baffles to keep out very large objects and help prevent the funnel from clogging. This designation is used when the specific type of sediment trap was not specified by the contributing investigator.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Patch	Patch Location (In/Out)	text	no_bcodmo_term
TIME_STATION	SOIREE Experiment Day T1 = 0000 h NZST 10/02/99 + 24 hours and Trap Id Used here as station identifier	text	no_bcodmo_term
Date_Start_NZST	Start date of trap deployment (NZST)	YYYYMMDD	date_begin
Time_Start_NZST	Start time of trap deployment (NZST)	HHMM	time_begin
lat_Start	Start latitude of trap deployment negative denotes South	decimal degrees	lat_begin
lon_Start	Start longitude of trap deployment negative denotes West	decimal degrees	lon_begin
lat_End	End latitude of trap deployment negative denotes South	decimal degrees	lat_end
lon_End	End longitude of trap deployment negative denotes West	decimal degrees	lon_end
Date_End_NZST	End date of trap deployment (NZST)	YYYYMMDD	date_end
Time_End_NZST	End time of trap deployment (NZST)	HHMM	time_end
Deployment_T	Deployment time	decimal days	no_bcodmo_term
Trap_Area	Trap area	meters2	no_bcodmo_term
T_times_A	T * A	(tbd)	no_bcodmo_term
Psi_Blk	Psi Blk	mg	no_bcodmo_term
TotPSi	Psi-Psi_Blk (TotPsi)	mg	no_bcodmo_term
Tot_PSi_flux_mg	Total Psi flux in mg	mg/m2/d	no_bcodmo_term
Av_PSi_flux	Average Psi flux	mg/m2/d	no_bcodmo_term
SD_AvPSi_flux	Std Dev Average Psi flux	mg/m2/d	no_bcodmo_term
CV_pct	CV %	percentage	no_bcodmo_term
Psi_to_Mass_pct	Psi/Mass %	percentage	no_bcodmo_term
PON_flux	PON flux	mmol/m2/d	no_bcodmo_term
Psi	Psi	ug/filter	no_bcodmo_term
POC_flux	POC flux	mmol/m2/d	no_bcodmo_term
C_to_Si	C:Si molar ratio	dimensionless ratio	no_bcodmo_term
Tot_PSi_flux_mmol	Total Psi flux in mmol	mmol/m2/d	no_bcodmo_term
Tot_Mass_flux	Total Mass flux	mg/m2/d	no_bcodmo_term
Si_to_N	Si/N molar	dimensionless ratio	no_bcodmo_term
Si_to_C	Si/C molar	dimensionless ratio	no_bcodmo_term
Filter_num	Filter Number	text	no_bcodmo_term

Database

Contribute Data

Dataset: SedimentTraps - Total PSi Flux
Deployment: 61TG_3052

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: SedimentTraps - Total PSi FluxDeployment: 61TG_3052

Dataset acquisition description

Dataset Processing Description

Dataset: SedimentTraps - Total PSi Flux
Deployment: 61TG_3052