Dataset: carbFST

Name: Particulate C, N and carbohydrates from floating sediment traps from cruises TT007, TT011 in the Equatorial Pacific in 1992 during the U.S. JGOFS Equatorial Pacific (EqPac) project
Published: 1996-06-01
Keywords: oceans

View Data: to access data, check the deployments below

Cite This Dataset

Project:

U.S. JGOFS Equatorial Pacific (EqPac)

Program:

U.S. Joint Global Ocean Flux Study (U.S. JGOFS)

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)

Version:

June, 1996

Version Date:

1996-06-01

Validated:

Yes

Current State:

Final no updates expected

Particulate C, N and carbohydrates from floating sediment traps from cruises TT007, TT011 in the Equatorial Pacific in 1992 during the U.S. JGOFS Equatorial Pacific (EqPac) project

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Description

Particulate C, N and carbohydrates from floating sediment traps

Methods & Sampling

See Platform deployments for cruise specific documentation

Data 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.

More Information about this dataset

Funding Sources

None available yet

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
TT007	EqPac Spring Survey	1992-01-30	R/V Thomas G. Thompson	James W. Murray (Chief Scientist)	data info
TT011	EqPac Fall Survey	1992-08-05	R/V Thomas G. Thompson	Richard Barber (Chief Scientist)	data info

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

Date and time formats are described in python strftime() syntax.

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

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Dataset: carbFST