Dataset: sed_trap_carbos
Deployment: EqPac-Array

Particulate C, N and carbohydrates from moored sediment traps

Principal Investigator:

Dr John Hedges (University of Washington, UW)

Co-Principal Investigator:

Cindy Lee (Stony Brook University, SUNY Stony Brook)

Stuart Wakeham (Skidaway Institute of Oceanography, SkIO)

BCO-DMO Data Manager:

Cynthia L. Chandler (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

U.S. JGOFS Equatorial Pacific (EqPac)

Version:

June, 1996

Deployment Synonyms:

W9201B, EqPac-1, sediment trap

Version Date:

1996-06-15

Data URL:

https://www.bco-dmo.org/dataset-deployment/450800/data

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Description

Particulate C, N and carbohydrates from moored sediment traps

Methods & Sampling

Dataset acquisition description

   PI:              John Hedges (Hedges/Lee/Wakeham)
   of:              University of Washington
   dataset:         Particulate C, N and carbohydrates from moored sediment traps
   dates:           February 3, 1992 to December 13, 1992
   location:        N: 9  S: 0  W: -140  E: -140
   project/cruise:  Mooring Deployment EQPAC-1 along 140 West W9201B
   ship:            R/V Wecoma
 
   PI Notes
   Note on Peter Hernes carbohydrate sediment trap data - EQPAC
 
   IRS Traps refer to "Indented Rotating Sphere Traps".
   The IRS traps had one poison diffuser with approximately
   400 g NaCl and 400 mg mercuric chloride.
   NVC Traps refer to  "No Valve Control Traps",
   these traps did not have the indented rotating sphere
   valves.  The NVC traps had two poison diffusers, each with
   approximately 400 g NaCl and 400 mg mercuric chloride.
 
   For more detail on sediment trap arrays see:
   Cruise Report, EQPAC - 1, The First Leg of A JGOFS Study 
   of the Equatorial Pacific, R/V Wecoma W9201B,
   January 12, 1992 to February 8, 1992,  
   Chief Scientist: Jack Dymond, Oregon State University
 
   Sampling Protocols
 
   Reference:  Wilford Gardner (Texas A&M University) report on the use of sediment
   traps in upper 200m of the water column originally written as minutes for the
   meeting on the subject at the First International JGOFS Symposium held in
   Villefranche-sur-Mer, France in May, 1995, and eventually published as:
 
   Gardner, W. D., 2000. Sediment Trap Technology and Sampling in Surface Waters
   In: Hanson, R. B., Ducklow, H.W., and Field, J.G., The Changing Ocean Carbon Cycle:
   A midterm synthesis of the Joint Global Ocean Flux Study. pp 240-281.
   Cambridge University Press, U.S. JGOFS Contribution No. 362.

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

Instruments

Sediment Trap

Supplied Description:

Instrument Type

Generic Name: Sediment Trap

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

Generic Description:

Sediment Trap - IRS

Supplied Name: IRS Sediment Trap

Supplied Description:

Instrument Type

Generic Name: Sediment Trap - IRS

Acronym: Sed Trap - IRS

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. The Indented Rotating Sphere (IRS) Sediment Trap is described in Peterson et al. (Field evaluation of a valved sediment trap. 1993. Limnology and Oceanography, 38, pp. 1741-1761 and Novel techniques for collection of sinking particles in the ocean and determining their settling rates. 2005. Limnology and Oceanography Methods 3, pp. 520-532). The IRS trap consists of four cylindrical modules; a particle interceptor, an IRS valve; a skewed funnel, and an eleven sample carousel (designated IRSC trap). The key to the trap design is the patented IRS valve located between the particle interceptor and particle accumulator portions of the trap. The valve and carousel are regulated by a TattleTale IVA (manufactured by Onset Computer Corp.) microprocessor and custom software. The IRS sediment trap was specifically designed to exclude zooplankton (Trull et al. 2008. Deep-Sea Research II v.55 pp. 1684-1695).

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
mooring	mooring identification from Wecoma Cruise Report		mooring
trap_type	sediment trap type, IRS or NVC (see PI Notes for more details)		no_bcodmo_term
lat_n	nominal latitude of mooring in whole degrees (negative = south)	degrees	no_bcodmo_term
lon_n	nominal longitude of mooring in whole degrees (negative = west)	degrees	no_bcodmo_term
depth_t	position of trap in water column as measured from surface	meters	no_bcodmo_term
pm_f	total particulate mass flux defined as amount of sinking particulate matter passing through a depth level in the water column	mg/m^2/day	no_bcodmo_term
POC	weight percent of organic carbon in total particulates determined by aqueous acidification (salt-corrected wt.)	percent	POC
N_p_tot	weight percent of total nitrogen in total particulates (salt-corrected wt.)	percent	no_bcodmo_term
PIC	weight percent of inorganic carbon in total particulates determined by deducting POC from total particulate carbon (salt-corrected)	percent	no_bcodmo_term
lyxose	weight percent lyxose monomer of total carbohydrates	percent	no_bcodmo_term
arabinose	weight percent arabinose monomer of total carbohydrates	percent	no_bcodmo_term
rhamnose	weight percent rhamnose monomer of total carbohydrates	percent	no_bcodmo_term
ribose	weight percent ribose monomer of total carbohydrates	percent	no_bcodmo_term
xylose	weight percent xylose monomer of total carbohydrates	percent	no_bcodmo_term
fucose	weight percent fucose monomer of total carbohydrates	percent	no_bcodmo_term
mannose	weight percent mannose monomer of total carbohydrates	percent	no_bcodmo_term
galactose	weight percent galactose monomer of total carbohydrates	percent	no_bcodmo_term
glucose	weight percent glucose monomer of total carbohydrates	percent	no_bcodmo_term
carb_tot_POC_ratio	weight ratio of mg total carbohydrates per 100mg of organic carbon in particulate matter	mg per 100mg	no_bcodmo_term

Database

Contribute Data

Dataset: sed_trap_carbos
Deployment: EqPac-Array

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: sed_trap_carbosDeployment: EqPac-Array

Dataset acquisition description

Dataset Processing Description

Dataset: sed_trap_carbos
Deployment: EqPac-Array