Dataset: carbFST
Deployment: TT011

Particulate C, N and carbohydrates from floating 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:

EqPac Fall Survey

Version Date:

1996-06-15

Data URL:

https://www.bco-dmo.org/dataset-deployment/450909/data

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Description

Particulate C, N and carbohydrates from floating sediment traps

Methods & Sampling

Dataset acquisition description

See Platform deployments for cruise specific documentation

Deployment-specific acquisition description

   PI:              John Hedges (Hedges/Lee/Wakeham)
   dataset:         Particulate C, N and carbohydrates from floating sediment traps
   dates:           August 10, 1992 to September 12, 1992
   location:        N: 12.0133  S: -12.0016  W: -140.0498  E: -134.9744
   project/cruise:  EQPAC/TT011 - Fall Survey
   ship:            Thomas Thompson
 
   Sampling Protocols
 
   References:  Sediment Trap Technology and Sampling in Surface Waters
   by Wilford Gardner (Texas A&M University), a 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.
 
   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.

A variety of particle samples will be collected in the water column, including: 1) large volume in-situ filtration samples in surface waters near the chlorophyll maximum at each survey station (coordinated with J. K. B. Bishop), 2) particulate matter sinking out of the euphotic zone (100 m depth) collected by floating sediment traps (coordinated with J. W. Murray and J. Newton), and 3) particles collected in moored sediment traps at about 1,000 m below the sea surface and 1,000 m off the bottom (coordinated with S. Honjo and J. Dymond). The large-volume filtration samples and floating sediment trap samples will be collected on both survey cruises, while the moored trap samples will be collected at stations located at 9ï¿½ and 5ï¿½N and at the equator (coordinated with M. Leinen). Bottom sediments will be collected from box cores at all sites of the benthic cruise. Depending on time available, we also hope to obtain vertical profiles of size-fractionated large-volume filtration samples at the three moored-trap sites (with J. K. B. Bishop).

Data Processing Description

Dataset Processing Description

Analyses: Particle and sediment samples will be analyzed for a wide range of major biochemical properties: 1) lipids by extraction, fractionation, and gas chromatography and gas chromatography/mass spectrometry (Wakeham); 2) amino acids by hydrolysis and HPLC analysis of OPA fluorescent derivatives (Lee); 3) aldoses and cyclitols by acid hydrolysis and GC and GC/MS analysis of peracetate or TMS derivatives (Hedges); 4) elemental composition by CHN analysis (Hedges). We plan to provide aliquots of particle and trap samples to J. K. B. Bishop (elemental composition), J. R. Murray/J. Newton (pigments, elemental composition, radionuclides), and R. Bidigare (isotopic composition of pigments) if sample sizes are adequate.
QA/QC: An intercomparison of elemental compositions of samples will be made with other EqPac investigators. We also intend to archive large amounts of sediment for eventual use as organic geochemical ``reference materials.'' However, because the molecular organic measurements to be carried out by our groups are practiced in a limited number of laboratories worldwide and because standard reference materials are not available, the corresponding QC strategies must be individualistic at this point pending the development of protocols and reference materials as suggested by the recent FRECLES Workshop.

Deployment-specific processing description

<ol>
<li>
Analyses: Particle and sediment samples will be analyzed for a wide range of major biochemical properties: 1) lipids by extraction, fractionation, and gas chromatography and gas chromatography/mass spectrometry (Wakeham); 2) amino acids by hydrolysis and HPLC analysis of OPA fluorescent derivatives (Lee); 3) aldoses and cyclitols by acid hydrolysis and GC and GC/MS analysis of peracetate or TMS derivatives (Hedges); 4) elemental composition by CHN analysis (Hedges). We plan to provide aliquots of particle and trap samples to J. K. B. Bishop (elemental composition), J. R. Murray/J. Newton (pigments, elemental composition, radionuclides), and R. Bidigare (isotopic composition of pigments) if sample sizes are adequate.
</li>
<li>
QA/QC: An intercomparison of elemental compositions of samples will be made with other EqPac investigators. We also intend to archive large amounts of sediment for eventual use as organic geochemical ``reference materials.'' However, because the molecular organic measurements to be carried out by our groups are practiced in a limited number of laboratories worldwide and because standard reference materials are not available, the corresponding QC strategies must be individualistic at this point pending the development of protocols and reference materials as suggested by the recent FRECLES Workshop.
</li>
</ol>

More information about this dataset deployment

Instruments

Sediment Trap - Floating

Supplied Name: Floating Sediment Trap

Supplied Description:

Instrument Type

Generic Name: Sediment Trap - Floating

Acronym: Sed Trap - Float

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

Generic Description:

Floating sediment traps are specially designed sampling devices deployed to float in the water column (as opposed to being secured to a mooring at a fixed depth) for periods of time to collect particles from the water column that are falling toward the sea floor. In general a sediment trap has a container 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 'Sediment Trap -Floating' designation is used for a floating type of sediment trap about which no other design details are known.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
sta	station number from event log		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
event	event/operation number from event log		event
depth_t	depth of trap	meters	no_bcodmo_term
pm_f	total particulate mass flux; amount of sinking particulate matter passing through a depth level in the water column	mg/m^2/day	no_bcodmo_term
POC	organic carbon in total particulates determined by aqueous acidification (salt-corrected wt.)	weight percent	POC
N_p_tot	total nitrogen in total particulates salt-corrected wt.)	weight percent	no_bcodmo_term
PIC	inorganic carbon in total determined by deducting POC from total particulate carbon (salt-corrected)	particulates	no_bcodmo_term
lyxose	lyxose monomer of total carbohydrates	weight percent	no_bcodmo_term
arabinose	arabinose monomer of total carbohydrates	weight percent	no_bcodmo_term
rhamnose	rhamnose monomer of total carbohydrates	weight percent	no_bcodmo_term
ribose	ribose monomer of total carbohydrates	weight percent	no_bcodmo_term
xylose	xylose monomer of total carbohydrates	weight percent	no_bcodmo_term
fucose	fucose monomer of total carbohydrates	weight percent	no_bcodmo_term
mannose	mannose monomer of total carbohydrates	weight percent	no_bcodmo_term
galactose	galactose monomer of total carbohydrates	weight percent	no_bcodmo_term
glucose	glucose monomer of total carbohydrates	weight percent	no_bcodmo_term
carb_tot_POC_ratio	weight ratio of mg total carbohydrates per 100mg organic carbon in particulate matter	mg per 100mg	no_bcodmo_term

Database

Contribute Data

Dataset: carbFST
Deployment: TT011

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Deployment-specific processing description

Database

Contribute Data

Dataset: carbFSTDeployment: TT011

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Deployment-specific processing description

Dataset: carbFST
Deployment: TT011