Dataset: SedimentTraps - Total PN Flux
Deployment: 61TG_3052

Sediment Traps - Total PN flux

Principal Investigator:

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

Co-Principal Investigator:

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:

25August2009

Deployment Synonyms:

SOIREE

Version Date:

2009-08-25

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/451444/data

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Description

SOIREE Sediment Traps - Total PN flux

Methods & Sampling

Dataset acquisition description

See SOIREE Preliminary Voyage Report

METHOD:

POC/PON determined on a CHN analyser after treating filtered samples (pre-weighed and

pre-combusted GF/F) with 8% sulphurous acid (Verardo et al., 1990; JGOFS Report 29, 1994).

PIC content was estimated by measuring the weight loss from selected half-filters.

Original samples from traps 4-6 inadvertantly rinsed with 1 M ammonium formate,

so 1/2 filters from traps 7-9 were used for POC/PN determinations

Detection Limit: 0.01

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: TrapPNFlux

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

- Formatted Date to YYYYMMDD

- Dates, Times, Lat, Lons added from file: SOIREE_SedimentTraps_TrapDeploy.xls

- Deleted duplicate TotPN column

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
Corrected_PN	Corrected PN	ug/filter	no_bcodmo_term
PN_Blk	PN Blk	mg	no_bcodmo_term
TotPN	PN-PN_Blk (TotPN)	mg	no_bcodmo_term
Tot_PN_flux	Total PN flux	mg/m2/d	no_bcodmo_term
Av_PN_flux	Average PN flux	mg/m2/d	no_bcodmo_term
SD_Av_PN_flux	Std Dev Average PN flux	mg/m2/d	no_bcodmo_term
CV_pct	CV %	percentage	no_bcodmo_term
Av_Mass_flux	Average Mass flux	mg/m2/d	no_bcodmo_term
PON_to_Mass_pct	PON/Mass %	percentage	no_bcodmo_term
PON_flux	PON flux	mmol/m2/d	no_bcodmo_term
POC	POC	ug/filter	POC
PN	PN	ug/filter	no_bcodmo_term
Av_PC_Blk	Average PC Blk	mg/m2/d	no_bcodmo_term
SD_Av_PC_Blk	Std Dev Average PC Blk	mg/m2/d	no_bcodmo_term
Av_PN_Blk	Average PN Blk	mg/m2/d	no_bcodmo_term
SD_Av_PN_Blk	Std Dev Average PN Blk	mg/m2/d	no_bcodmo_term

Database

Contribute Data

Dataset: SedimentTraps - Total PN Flux
Deployment: 61TG_3052

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: SedimentTraps - Total PN FluxDeployment: 61TG_3052

Dataset acquisition description

Dataset Processing Description

Dataset: SedimentTraps - Total PN Flux
Deployment: 61TG_3052