Dataset: OFP Elemental
Deployment: OFP_Time-Series

Mass flux and concentrations of bulk components (Carbonate, Organic Carbon/Nitrogen, Lithogenics, Opal and elements) in the flux at 500m, 1500m and 3200m depths

Principal Investigator:

Maureen H. Conte (Bermuda Institute of Ocean Sciences, BIOS)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Time Series Particle Flux Measurements in the Sargasso Sea (OFP Sargasso Sea)

Current State:

Final no updates expected

Deployment Synonyms:

Ocean Flux Program, SCIFF, Seasonal Changes in Isotopes and Flux of Foraminifera

Data URL:

https://www.bco-dmo.org/dataset-deployment/784427/data

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Description

Mass flux and concentrations of bulk components (Carbonate, Organic Carbon/Nitrogen, Lithogenics, Opal) and elements in the flux at 500m, 1500m and 3200m depths from the OFP sediment trap time-series in the northern Sargasso Sea.

Access restrictions:
If you plan to use this data, please contact me, Maureen H. Conte @ mconte@mbl.edu. For the OFP time-series records, it is extremely important that we have a record of how the data are utilized, and by whom to support continued OFP funding. Also, talking with me will ensure that you are clear about the data naming conventions, etc., and let you know if there are others using the data for similar research. I also can give you some valuable insights that should be valuable concerning the OFP flux data in general. Thank you! Maureen Conte, principal Investigator OFP time-series

Methods & Sampling

Dataset acquisition description

Sampling and analytical methodology for carbonate, and organic carbon/nitrogen are described in detail in the "2019_OFP_Methodologies" document (see Supplemental Files).

Analytical methodology for the element data are described in detail in Conte et al. (2019).

The LiBO2 fusion method is described in detail in Huang et al. (2007).

Briefly, the dried <1mm sediment trap material is processed by fusion with high purity lithium metaborate (LiBO2) flux at 1000 C in a dedicated combustion furnace. The sample to LiBO2 flux ratio for fusion is approximately1:2.5. The fused sample bead is subsequently dissolved in 1M HNO3 for ICPMS analysis. From 2000 to 2004, we used 1–2 mg of flux material for analysis, but in 2005 we increased this to ~6 mg to reduce analytical variability associated with particle heterogeneity. Blank analyses of the LiBO2 flux are run with each sample set to assess contamination. The final sample solution was analyzed on a high-resolution Finnigan Element 2 ICPMS. A matrix-matching multi-element external standard solution was used for determination of the trace element concentrations.

Data Processing Description

Dataset Processing Description

Processing information is described in detail in the "2019_OFP_methodologies" document (see Supplemental Files).

BCO-DMO Processing:
- modified parameter names: replaced % with "pcnt", > with "gt", < with "lt", and hyphens with underscores;
- replaced missing data and values of "-999" with "nd" (no data).

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1536644	NSF Division of Ocean Sciences

Instruments

McLane PARFLUX Mark 8 Sediment Trap

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: McLane PARFLUX Mark 8 Sediment Trap

Acronym: McLane PARFLUX Mark 8

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

Generic Description:

The Mark 8 Sediment Trap is a time-series instrument that autonomously collects the flux of settling particles on an operator-defined schedule. The wide top funnel accumulates particulate specimens into individual sample bottles. The cone interior is natural polyethylene. Deploys from a stand-alone mooring or a large high-tension vertical array.

McLane Mark 8 Data Sheet (PDF)
McLane website: http://www.mclanelabs.com/master_page/product-type/samplers/sediment-traps

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
depth	sampling depth in meters	meters (m)	depth
SampleID	The OFP naming convention uses the month of the mooring recovery cruise, the sequential number of the trap cup, and trap depth. E.g. %11/10-4 1500 denotes the sample was recovered in Nov 2010, was the fourth trap cup in the sampling rotation during the deployment and the sediment trap was located at 1500m depth. Samples collected using the single cup trap (prior to 1989), are named by the recovery date only (Please note: The Sample ID does NOT indicate the date of sample collection!! The start date of the sample collection is provided by the sequence day (Sequence Day 1 = 4 Apr 1978) and the start calendar date.	unitless	sample
SeqDay	Number of days since the beginning of the OFP time-series (SeqDay 1=4 April 1978). The SeqDay is the first day of the sample collection period.	unitless	time_elapsed
midSeqDay	Sequence day of the middle of the sample collection period	unitless	time_sample
StartYr	Start year for sample	unitless	year
StartMo	Start month for sample	unitless	month
StartDay	Start day for sample	unitless	day
MidJDay	Mid Julian Day is the Julian Day (Day of Year) of the midpoint of the sample collection period.	unitless	time_sample
MassFlux	Total mass Flux	milligrams per square meter per day (mg/m2/day)	flux
pcnt_Carb_lt_125	percent carbonate by weight	unitless (percent)	carbonate
pcnt_Corg_lt_125	percent organic carbon by weight	unitless (percent)	C
pcnt_N_lt_125	percent nitrogen by weight	unitless (percent)	N
pcnt_Lith_lt_1000est	estimated mass percent lithogenic material	unitless (percent)	mass
pcnt_Opal_lt_1000est	estimated mass percent opal	unitless (percent)	mass
Mg_lt_1000	Mg concentration by weight	milligrams per kilogram	Mg
Al_lt_1000	Al concentration by weight	milligrams per kilogram	Al
Total_Si_lt_1000	Total Si (Biogenic Si + lithogenic Si) concentration by weight	milligrams per kilogram	Si
P_lt_1000	P concentration by weight	milligrams per kilogram	P
Ca_lt_1000	Ca concentration by weight	milligrams per kilogram	Ca
Sc_lt_1000	Sc concentration by weight	milligrams per kilogram	Sc
Ti_lt_1000	Ti concentration by weight	milligrams per kilogram	Ti
V_lt_1000	V concentration by weight	milligrams per kilogram	V
Cr_lt_1000	Cr concentration by weight	milligrams per kilogram	Cr
Mn_lt_1000	Mn concentration by weight	milligrams per kilogram	Mn
Fe_lt_1000	Fe concentration by weight	milligrams per kilogram	Fe
Co_lt_1000	Co concentration by weight	milligrams per kilogram	Co
Ni_lt_1000	Ni concentration by weight	milligrams per kilogram	Ni
Cu_lt_1000	Cu concentration by weight	milligrams per kilogram	Cu
Zn_lt_1000	Zn concentration by weight	milligrams per kilogram	Zn
Sr_lt_1000	Sr concentration by weight	milligrams per kilogram	Sr
Cd_lt_1000	Cd concentration by weight	milligrams per kilogram	Cd
Ba_lt_1000	Ba concentration by weight	milligrams per kilogram	Ba
Pb_lt_1000	Pb concentration by weight	milligrams per kilogram	Pb
Comments	notes/comments	unitless	comment

Database

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Dataset: OFP Elemental
Deployment: OFP_Time-Series

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: OFP ElementalDeployment: OFP_Time-Series

Dataset acquisition description

Dataset Processing Description

Dataset: OFP Elemental
Deployment: OFP_Time-Series