traps_Deploy

Data Object SedimentTraps - Deployments

contact PIs:

name	title
Dr Scott Nodder	Principal Investigator
Dr Matthew A Charette	Co-Principal Investigator
Dr Tom W. Trull	Co-Principal Investigator
Dr Anya Waite	Co-Principal Investigator

Dataset description

SOIREE Sediment Trap - Deloyments

SOIREE traps - logistics
(Nodder, Charette, Waite, Trull)

Note this T1, T0 for Sediment Traps
Day T1 = 0000 h NZST 10/02/99 + 24 hours to 0000 h NZST 11/02/99
with the nominal start of SOIREE (T0) at 0000 h NZST 10/02/99;
NZST = UTC + 12 hours

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

Note: traps were deployed with a 1-D high density brine solution
(excess 50 ppt NaCl) which would alter trap AR

Flux calculations:
Flux (mg/m2/d) = Wt sample/(trap collection area x days deployed)

Wt sample = Wtfiltered - Wtblank

METHOD
Free-floating arrays of baffled, cylindrical MULTI-sediment traps.
Twelve traps deployed on each cross-frame, 9 back-filled with a 1-trap
diameter thick (7 cm), 50‰ excess NaCl basal brine (50 g NaCl/l) and 3
with polyacrylimide gels mounted on base

For all deployments and all depths:
traps 1-3 = gel samples (Anya Waite)
traps 4-6 = POC/PN/13Corg or mass/PSi (Scott Nodder, Tom Trull)
traps 7-9 = phytopigments (Scott Nodder)

For all deployments and 100 m only: traps 10-12 = Th samples (Matt Charette)

For all deployments and 300 m only: traps 10-12 = POC/PN samples (Scott Nodder)

Refer to Nodder & Waite in DSRII

Acquisition description

See SOIREE Preliminary Voyage Report
See comments in dataset description as well

Processing description

See SOIREE Preliminary Voyage Report
See comments in dataset description as well

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

BCO-DMO Edits
- parameter names modified to conform to BCO-DMO convention
- date formatted as YYYYMMDD
- time formatted as HHMM
- Lat/Lon padded to three decimal places and '–' sign added to lat
- Blank rows in original sheet removed
- 'nd' added to blank cells
- Made column header record one line
- Filled in mostly blank cells for deeper array with data from shallower array (should be the same)
- Added 'Notes' column

Field Names List

Parameter	Description	Units
Patch	Patch Location (In/Out)	text
Buoy_ID	Buoy Id	integer
SOIREE_Day	SOIREE Day of experiment Note this T1, T0 for Sediment Traps Day T1 = 0000 h NZST 10/02/99 + 24 hours to 0000 h NZST 11/02/99 with the nominal start of SOIREE (T0) at 0000 h NZST 10/02/99; NZST = UTC + 12 hours	text
Array	Sediment trap array number	integer
depth	Nominal depths only, actual depths were 10 m deeper	meters
Array_ID	Array Id - Single Letter	text
Temp_Sensors	Temperature sensor ids	integer
Date_Start_NZST	Start date of trap deployment (NZST)	YYYYMMDD
Julian_Day_Start	Start Julian day of year of trap deployment	DD
Time_Start_NZST	Start time of trap deployment (NZST)	HHMM
lat_Start	Start latitude of trap deployment negative denotes South	decimal degrees
lon_Start	Start longitude of trap deployment negative denotes West	decimal degrees
lat_End	End latitude of trap deployment negative denotes South	decimal degrees
lon_End	End longitude of trap deployment negative denotes West	decimal degrees
Date_End_NZST	End date of trap deployment (NZST)	YYYYMMDD
Time_End_NZST	End time of trap deployment (NZST)	HHMM
Julian_Day_End	End Julian day of trap deployment	DD
Distance_x	X Drift distance in meters	meters
Distance_y	Y Drift distance in meters	meters
Total_distance	Total drift distance in kilometers	kilometers
Total_time_days	Total trap deployment time in days	decimal days
Drift_rate_km_per_d	Drift rate in km/day	km/day
Drift_rate_cm_per_s	Drift rate in cm/sec	cm/sec
Notes	Notes column	text

Platforms List

R/V Tangaroa 61TG_3052

Instruments List

Sediment Trap:
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

This document is created from the content of the BCO-DMO metadata database. 2010-09-02 21:51:12

info app: /home/bco/dbase-v2 v.100108 CLC
Data URL: http://data.bco-dmo.org/jg/serv/BCO/Fe_Synthesis/SOIREE/61TG_3052/traps_Deploy.